Apache Hadoop qbt Report: trunk+JDK11 on Linux/x86_64

[Apache Jenkins Server]

For more details, see 
https://ci-hadoop.apache.org/job/hadoop-qbt-trunk-java11-linux-x86_64/66/

[Nov 22, 2020 1:49:56 AM] (noreply) HDFS-15690. Add lz4-java as test dependency 
(#2481)




-1 overall


The following subsystems voted -1:
    blanks findbugs mvnsite pathlen unit xml


The following subsystems voted -1 but
were configured to be filtered/ignored:
    cc checkstyle javac javadoc pylint shellcheck shelldocs


The following subsystems are considered long running:
(runtime bigger than 1h  0m  0s)
    unit


Specific tests:

    XML :

       Parsing Error(s): 
       
hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/src/test/resources/nvidia-smi-output-excerpt.xml
 
       
hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/src/test/resources/nvidia-smi-output-missing-tags.xml
 
       
hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/src/test/resources/nvidia-smi-output-missing-tags2.xml
 
       
hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/src/test/resources/nvidia-smi-sample-output.xml
 
       
hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/test/resources/fair-scheduler-invalid.xml
 
       
hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/test/resources/yarn-site-with-invalid-allocation-file-ref.xml
 

    findbugs :

       module:hadoop-common-project/hadoop-common 
       Nullcheck of cc at line 457 of value previously dereferenced in 
org.apache.hadoop.crypto.key.KeyProviderCryptoExtension$DefaultCryptoExtension.decryptEncryptedKey(KeyProviderCryptoExtension$EncryptedKeyVersion)
 At KeyProviderCryptoExtension.java:457 of value previously dereferenced in 
org.apache.hadoop.crypto.key.KeyProviderCryptoExtension$DefaultCryptoExtension.decryptEncryptedKey(KeyProviderCryptoExtension$EncryptedKeyVersion)
 At KeyProviderCryptoExtension.java:[line 457] 
       Nullcheck of cc at line 368 of value previously dereferenced in 
org.apache.hadoop.crypto.key.KeyProviderCryptoExtension$DefaultCryptoExtension.reencryptEncryptedKeys(List)
 At KeyProviderCryptoExtension.java:368 of value previously dereferenced in 
org.apache.hadoop.crypto.key.KeyProviderCryptoExtension$DefaultCryptoExtension.reencryptEncryptedKeys(List)
 At KeyProviderCryptoExtension.java:[line 368] 
       Nullcheck of scope at line 3457 of value previously dereferenced in 
org.apache.hadoop.fs.FileSystem.createFileSystem(URI, Configuration) At 
FileSystem.java:3457 of value previously dereferenced in 
org.apache.hadoop.fs.FileSystem.createFileSystem(URI, Configuration) At 
FileSystem.java:[line 3457] 
       Nullcheck of out at line 1834 of value previously dereferenced in 
org.apache.hadoop.fs.FileUtil.write(FileContext, Path, CharSequence, Charset) 
At FileUtil.java:1834 of value previously dereferenced in 
org.apache.hadoop.fs.FileUtil.write(FileContext, Path, CharSequence, Charset) 
At FileUtil.java:[line 1834] 
       Nullcheck of out at line 1769 of value previously dereferenced in 
org.apache.hadoop.fs.FileUtil.write(FileContext, Path, Iterable, Charset) At 
FileUtil.java:1769 of value previously dereferenced in 
org.apache.hadoop.fs.FileUtil.write(FileContext, Path, Iterable, Charset) At 
FileUtil.java:[line 1769] 
       Nullcheck of out at line 1697 of value previously dereferenced in 
org.apache.hadoop.fs.FileUtil.write(FileContext, Path, byte[]) At 
FileUtil.java:1697 of value previously dereferenced in 
org.apache.hadoop.fs.FileUtil.write(FileContext, Path, byte[]) At 
FileUtil.java:[line 1697] 
       Nullcheck of out at line 1803 of value previously dereferenced in 
org.apache.hadoop.fs.FileUtil.write(FileSystem, Path, CharSequence, Charset) At 
FileUtil.java:1803 of value previously dereferenced in 
org.apache.hadoop.fs.FileUtil.write(FileSystem, Path, CharSequence, Charset) At 
FileUtil.java:[line 1803] 
       Nullcheck of out at line 1731 of value previously dereferenced in 
org.apache.hadoop.fs.FileUtil.write(FileSystem, Path, Iterable, Charset) At 
FileUtil.java:1731 of value previously dereferenced in 
org.apache.hadoop.fs.FileUtil.write(FileSystem, Path, Iterable, Charset) At 
FileUtil.java:[line 1731] 
       Nullcheck of out at line 1669 of value previously dereferenced in 
org.apache.hadoop.fs.FileUtil.write(FileSystem, Path, byte[]) At 
FileUtil.java:1669 of value previously dereferenced in 
org.apache.hadoop.fs.FileUtil.write(FileSystem, Path, byte[]) At 
FileUtil.java:[line 1669] 
       Nullcheck of in at line 376 of value previously dereferenced in 
org.apache.hadoop.fs.RawLocalFileSystem.concat(Path, Path[]) At 
RawLocalFileSystem.java:376 of value previously dereferenced in 
org.apache.hadoop.fs.RawLocalFileSystem.concat(Path, Path[]) At 
RawLocalFileSystem.java:[line 376] 
       Nullcheck of in at line 106 of value previously dereferenced in 
org.apache.hadoop.fs.shell.CopyCommands$Merge.processArguments(LinkedList) At 
CopyCommands.java:106 of value previously dereferenced in 
org.apache.hadoop.fs.shell.CopyCommands$Merge.processArguments(LinkedList) At 
CopyCommands.java:[line 106] 
       Nullcheck of fs at line 65 of value previously dereferenced in 
org.apache.hadoop.fs.viewfs.HCFSMountTableConfigLoader.load(String, 
Configuration) At HCFSMountTableConfigLoader.java:65 of value previously 
dereferenced in 
org.apache.hadoop.fs.viewfs.HCFSMountTableConfigLoader.load(String, 
Configuration) At HCFSMountTableConfigLoader.java:[line 65] 
       Nullcheck of channel at line 430 of value previously dereferenced in 
org.apache.hadoop.io.IOUtils.fsync(File) At IOUtils.java:430 of value 
previously dereferenced in org.apache.hadoop.io.IOUtils.fsync(File) At 
IOUtils.java:[line 430] 
       Nullcheck of stream at line 389 of value previously dereferenced in 
org.apache.hadoop.io.IOUtils.listDirectory(File, FilenameFilter) At 
IOUtils.java:389 of value previously dereferenced in 
org.apache.hadoop.io.IOUtils.listDirectory(File, FilenameFilter) At 
IOUtils.java:[line 389] 
       Redundant nullcheck of is, which is known to be non-null in 
org.apache.hadoop.util.ApplicationClassLoader.<static initializer for 
ApplicationClassLoader>() Redundant null check at 
ApplicationClassLoader.java:is known to be non-null in 
org.apache.hadoop.util.ApplicationClassLoader.<static initializer for 
ApplicationClassLoader>() Redundant null check at 
ApplicationClassLoader.java:[line 79] 
       Redundant nullcheck of resStream, which is known to be non-null in 
org.apache.hadoop.util.JsonSerialization.fromResource(String) Redundant null 
check at JsonSerialization.java:is known to be non-null in 
org.apache.hadoop.util.JsonSerialization.fromResource(String) Redundant null 
check at JsonSerialization.java:[line 213] 
       Nullcheck of dataInputStream at line 248 of value previously 
dereferenced in org.apache.hadoop.util.JsonSerialization.load(FileSystem, Path) 
At JsonSerialization.java:248 of value previously dereferenced in 
org.apache.hadoop.util.JsonSerialization.load(FileSystem, Path) At 
JsonSerialization.java:[line 248] 
       Nullcheck of in at line 204 of value previously dereferenced in 
org.apache.hadoop.util.RunJar.unJar(File, File, Pattern) At RunJar.java:204 of 
value previously dereferenced in org.apache.hadoop.util.RunJar.unJar(File, 
File, Pattern) At RunJar.java:[line 204] 

    findbugs :

       module:hadoop-common-project 
       Nullcheck of cc at line 457 of value previously dereferenced in 
org.apache.hadoop.crypto.key.KeyProviderCryptoExtension$DefaultCryptoExtension.decryptEncryptedKey(KeyProviderCryptoExtension$EncryptedKeyVersion)
 At KeyProviderCryptoExtension.java:457 of value previously dereferenced in 
org.apache.hadoop.crypto.key.KeyProviderCryptoExtension$DefaultCryptoExtension.decryptEncryptedKey(KeyProviderCryptoExtension$EncryptedKeyVersion)
 At KeyProviderCryptoExtension.java:[line 457] 
       Nullcheck of cc at line 368 of value previously dereferenced in 
org.apache.hadoop.crypto.key.KeyProviderCryptoExtension$DefaultCryptoExtension.reencryptEncryptedKeys(List)
 At KeyProviderCryptoExtension.java:368 of value previously dereferenced in 
org.apache.hadoop.crypto.key.KeyProviderCryptoExtension$DefaultCryptoExtension.reencryptEncryptedKeys(List)
 At KeyProviderCryptoExtension.java:[line 368] 
       Nullcheck of scope at line 3457 of value previously dereferenced in 
org.apache.hadoop.fs.FileSystem.createFileSystem(URI, Configuration) At 
FileSystem.java:3457 of value previously dereferenced in 
org.apache.hadoop.fs.FileSystem.createFileSystem(URI, Configuration) At 
FileSystem.java:[line 3457] 
       Nullcheck of out at line 1834 of value previously dereferenced in 
org.apache.hadoop.fs.FileUtil.write(FileContext, Path, CharSequence, Charset) 
At FileUtil.java:1834 of value previously dereferenced in 
org.apache.hadoop.fs.FileUtil.write(FileContext, Path, CharSequence, Charset) 
At FileUtil.java:[line 1834] 
       Nullcheck of out at line 1769 of value previously dereferenced in 
org.apache.hadoop.fs.FileUtil.write(FileContext, Path, Iterable, Charset) At 
FileUtil.java:1769 of value previously dereferenced in 
org.apache.hadoop.fs.FileUtil.write(FileContext, Path, Iterable, Charset) At 
FileUtil.java:[line 1769] 
       Nullcheck of out at line 1697 of value previously dereferenced in 
org.apache.hadoop.fs.FileUtil.write(FileContext, Path, byte[]) At 
FileUtil.java:1697 of value previously dereferenced in 
org.apache.hadoop.fs.FileUtil.write(FileContext, Path, byte[]) At 
FileUtil.java:[line 1697] 
       Nullcheck of out at line 1803 of value previously dereferenced in 
org.apache.hadoop.fs.FileUtil.write(FileSystem, Path, CharSequence, Charset) At 
FileUtil.java:1803 of value previously dereferenced in 
org.apache.hadoop.fs.FileUtil.write(FileSystem, Path, CharSequence, Charset) At 
FileUtil.java:[line 1803] 
       Nullcheck of out at line 1731 of value previously dereferenced in 
org.apache.hadoop.fs.FileUtil.write(FileSystem, Path, Iterable, Charset) At 
FileUtil.java:1731 of value previously dereferenced in 
org.apache.hadoop.fs.FileUtil.write(FileSystem, Path, Iterable, Charset) At 
FileUtil.java:[line 1731] 
       Nullcheck of out at line 1669 of value previously dereferenced in 
org.apache.hadoop.fs.FileUtil.write(FileSystem, Path, byte[]) At 
FileUtil.java:1669 of value previously dereferenced in 
org.apache.hadoop.fs.FileUtil.write(FileSystem, Path, byte[]) At 
FileUtil.java:[line 1669] 
       Nullcheck of in at line 376 of value previously dereferenced in 
org.apache.hadoop.fs.RawLocalFileSystem.concat(Path, Path[]) At 
RawLocalFileSystem.java:376 of value previously dereferenced in 
org.apache.hadoop.fs.RawLocalFileSystem.concat(Path, Path[]) At 
RawLocalFileSystem.java:[line 376] 
       Nullcheck of in at line 106 of value previously dereferenced in 
org.apache.hadoop.fs.shell.CopyCommands$Merge.processArguments(LinkedList) At 
CopyCommands.java:106 of value previously dereferenced in 
org.apache.hadoop.fs.shell.CopyCommands$Merge.processArguments(LinkedList) At 
CopyCommands.java:[line 106] 
       Nullcheck of fs at line 65 of value previously dereferenced in 
org.apache.hadoop.fs.viewfs.HCFSMountTableConfigLoader.load(String, 
Configuration) At HCFSMountTableConfigLoader.java:65 of value previously 
dereferenced in 
org.apache.hadoop.fs.viewfs.HCFSMountTableConfigLoader.load(String, 
Configuration) At HCFSMountTableConfigLoader.java:[line 65] 
       Nullcheck of channel at line 430 of value previously dereferenced in 
org.apache.hadoop.io.IOUtils.fsync(File) At IOUtils.java:430 of value 
previously dereferenced in org.apache.hadoop.io.IOUtils.fsync(File) At 
IOUtils.java:[line 430] 
       Nullcheck of stream at line 389 of value previously dereferenced in 
org.apache.hadoop.io.IOUtils.listDirectory(File, FilenameFilter) At 
IOUtils.java:389 of value previously dereferenced in 
org.apache.hadoop.io.IOUtils.listDirectory(File, FilenameFilter) At 
IOUtils.java:[line 389] 
       Redundant nullcheck of is, which is known to be non-null in 
org.apache.hadoop.util.ApplicationClassLoader.<static initializer for 
ApplicationClassLoader>() Redundant null check at 
ApplicationClassLoader.java:is known to be non-null in 
org.apache.hadoop.util.ApplicationClassLoader.<static initializer for 
ApplicationClassLoader>() Redundant null check at 
ApplicationClassLoader.java:[line 79] 
       Redundant nullcheck of resStream, which is known to be non-null in 
org.apache.hadoop.util.JsonSerialization.fromResource(String) Redundant null 
check at JsonSerialization.java:is known to be non-null in 
org.apache.hadoop.util.JsonSerialization.fromResource(String) Redundant null 
check at JsonSerialization.java:[line 213] 
       Nullcheck of dataInputStream at line 248 of value previously 
dereferenced in org.apache.hadoop.util.JsonSerialization.load(FileSystem, Path) 
At JsonSerialization.java:248 of value previously dereferenced in 
org.apache.hadoop.util.JsonSerialization.load(FileSystem, Path) At 
JsonSerialization.java:[line 248] 
       Nullcheck of in at line 204 of value previously dereferenced in 
org.apache.hadoop.util.RunJar.unJar(File, File, Pattern) At RunJar.java:204 of 
value previously dereferenced in org.apache.hadoop.util.RunJar.unJar(File, 
File, Pattern) At RunJar.java:[line 204] 

    findbugs :

       module:hadoop-hdfs-project/hadoop-hdfs-client 
       Nullcheck of in at line 236 of value previously dereferenced in 
org.apache.hadoop.hdfs.web.ByteRangeInputStream.read(long, byte[], int, int) At 
ByteRangeInputStream.java:236 of value previously dereferenced in 
org.apache.hadoop.hdfs.web.ByteRangeInputStream.read(long, byte[], int, int) At 
ByteRangeInputStream.java:[line 236] 

    findbugs :

       module:hadoop-hdfs-project/hadoop-hdfs 
       Nullcheck of iterator at line 302 of value previously dereferenced in 
org.apache.hadoop.hdfs.server.aliasmap.InMemoryAliasMap.createSnapshot(InMemoryAliasMap)
 At InMemoryAliasMap.java:302 of value previously dereferenced in 
org.apache.hadoop.hdfs.server.aliasmap.InMemoryAliasMap.createSnapshot(InMemoryAliasMap)
 At InMemoryAliasMap.java:[line 302] 
       Nullcheck of iterator at line 138 of value previously dereferenced in 
org.apache.hadoop.hdfs.server.aliasmap.InMemoryAliasMap.list(Optional) At 
InMemoryAliasMap.java:138 of value previously dereferenced in 
org.apache.hadoop.hdfs.server.aliasmap.InMemoryAliasMap.list(Optional) At 
InMemoryAliasMap.java:[line 138] 
       Nullcheck of dirStream at line 621 of value previously dereferenced in 
org.apache.hadoop.hdfs.server.common.Storage$StorageDirectory.checkEmptyCurrent()
 At Storage.java:621 of value previously dereferenced in 
org.apache.hadoop.hdfs.server.common.Storage$StorageDirectory.checkEmptyCurrent()
 At Storage.java:[line 621] 
       Nullcheck of pair at line 623 of value previously dereferenced in 
org.apache.hadoop.hdfs.server.datanode.BlockChecksumHelper$BlockGroupNonStripedChecksumComputer.checksumBlock(ExtendedBlock,
 int, Token, DatanodeInfo) At BlockChecksumHelper.java:623 of value previously 
dereferenced in 
org.apache.hadoop.hdfs.server.datanode.BlockChecksumHelper$BlockGroupNonStripedChecksumComputer.checksumBlock(ExtendedBlock,
 int, Token, DatanodeInfo) At BlockChecksumHelper.java:[line 623] 
       Nullcheck of instr at line 1182 of value previously dereferenced in 
org.apache.hadoop.hdfs.server.datanode.BlockReceiver.computePartialChunkCrc(long,
 long) At BlockReceiver.java:1182 of value previously dereferenced in 
org.apache.hadoop.hdfs.server.datanode.BlockReceiver.computePartialChunkCrc(long,
 long) At BlockReceiver.java:[line 1182] 
       Redundant nullcheck of oldLock, which is known to be non-null in 
org.apache.hadoop.hdfs.server.datanode.DataStorage.isPreUpgradableLayout(Storage$StorageDirectory)
 Redundant null check at DataStorage.java:is known to be non-null in 
org.apache.hadoop.hdfs.server.datanode.DataStorage.isPreUpgradableLayout(Storage$StorageDirectory)
 Redundant null check at DataStorage.java:[line 694] 
       Nullcheck of volumes at line 601 of value previously dereferenced in 
org.apache.hadoop.hdfs.server.datanode.DirectoryScanner.getVolumeReports() At 
DirectoryScanner.java:601 of value previously dereferenced in 
org.apache.hadoop.hdfs.server.datanode.DirectoryScanner.getVolumeReports() At 
DirectoryScanner.java:[line 601] 
       Nullcheck of volumeReferences at line 214 of value previously 
dereferenced in 
org.apache.hadoop.hdfs.server.datanode.DiskBalancer.getFsVolume(FsDatasetSpi, 
String) At DiskBalancer.java:214 of value previously dereferenced in 
org.apache.hadoop.hdfs.server.datanode.DiskBalancer.getFsVolume(FsDatasetSpi, 
String) At DiskBalancer.java:[line 214] 
       Nullcheck of dataIn at line 1233 of value previously dereferenced in 
org.apache.hadoop.hdfs.server.datanode.fsdataset.impl.FsDatasetImpl.computeChecksum(ReplicaInfo,
 File, int, Configuration) At FsDatasetImpl.java:1233 of value previously 
dereferenced in 
org.apache.hadoop.hdfs.server.datanode.fsdataset.impl.FsDatasetImpl.computeChecksum(ReplicaInfo,
 File, int, Configuration) At FsDatasetImpl.java:[line 1233] 
       Nullcheck of ref at line 243 of value previously dereferenced in 
org.apache.hadoop.hdfs.server.datanode.fsdataset.impl.RamDiskAsyncLazyPersistService$ReplicaLazyPersistTask.run()
 At RamDiskAsyncLazyPersistService.java:243 of value previously dereferenced in 
org.apache.hadoop.hdfs.server.datanode.fsdataset.impl.RamDiskAsyncLazyPersistService$ReplicaLazyPersistTask.run()
 At RamDiskAsyncLazyPersistService.java:[line 243] 
       Nullcheck of beforeStream at line 131 of value previously dereferenced 
in 
org.apache.hadoop.hdfs.server.diskbalancer.command.PlanCommand.execute(CommandLine)
 At PlanCommand.java:131 of value previously dereferenced in 
org.apache.hadoop.hdfs.server.diskbalancer.command.PlanCommand.execute(CommandLine)
 At PlanCommand.java:[line 131] 
       Nullcheck of planStream at line 162 of value previously dereferenced in 
org.apache.hadoop.hdfs.server.diskbalancer.command.PlanCommand.execute(CommandLine)
 At PlanCommand.java:162 of value previously dereferenced in 
org.apache.hadoop.hdfs.server.diskbalancer.command.PlanCommand.execute(CommandLine)
 At PlanCommand.java:[line 162] 

    findbugs :

       module:hadoop-hdfs-project 
       Nullcheck of iterator at line 302 of value previously dereferenced in 
org.apache.hadoop.hdfs.server.aliasmap.InMemoryAliasMap.createSnapshot(InMemoryAliasMap)
 At InMemoryAliasMap.java:302 of value previously dereferenced in 
org.apache.hadoop.hdfs.server.aliasmap.InMemoryAliasMap.createSnapshot(InMemoryAliasMap)
 At InMemoryAliasMap.java:[line 302] 
       Nullcheck of iterator at line 138 of value previously dereferenced in 
org.apache.hadoop.hdfs.server.aliasmap.InMemoryAliasMap.list(Optional) At 
InMemoryAliasMap.java:138 of value previously dereferenced in 
org.apache.hadoop.hdfs.server.aliasmap.InMemoryAliasMap.list(Optional) At 
InMemoryAliasMap.java:[line 138] 
       Nullcheck of dirStream at line 621 of value previously dereferenced in 
org.apache.hadoop.hdfs.server.common.Storage$StorageDirectory.checkEmptyCurrent()
 At Storage.java:621 of value previously dereferenced in 
org.apache.hadoop.hdfs.server.common.Storage$StorageDirectory.checkEmptyCurrent()
 At Storage.java:[line 621] 
       Nullcheck of pair at line 623 of value previously dereferenced in 
org.apache.hadoop.hdfs.server.datanode.BlockChecksumHelper$BlockGroupNonStripedChecksumComputer.checksumBlock(ExtendedBlock,
 int, Token, DatanodeInfo) At BlockChecksumHelper.java:623 of value previously 
dereferenced in 
org.apache.hadoop.hdfs.server.datanode.BlockChecksumHelper$BlockGroupNonStripedChecksumComputer.checksumBlock(ExtendedBlock,
 int, Token, DatanodeInfo) At BlockChecksumHelper.java:[line 623] 
       Nullcheck of instr at line 1182 of value previously dereferenced in 
org.apache.hadoop.hdfs.server.datanode.BlockReceiver.computePartialChunkCrc(long,
 long) At BlockReceiver.java:1182 of value previously dereferenced in 
org.apache.hadoop.hdfs.server.datanode.BlockReceiver.computePartialChunkCrc(long,
 long) At BlockReceiver.java:[line 1182] 
       Redundant nullcheck of oldLock, which is known to be non-null in 
org.apache.hadoop.hdfs.server.datanode.DataStorage.isPreUpgradableLayout(Storage$StorageDirectory)
 Redundant null check at DataStorage.java:is known to be non-null in 
org.apache.hadoop.hdfs.server.datanode.DataStorage.isPreUpgradableLayout(Storage$StorageDirectory)
 Redundant null check at DataStorage.java:[line 694] 
       Nullcheck of volumes at line 601 of value previously dereferenced in 
org.apache.hadoop.hdfs.server.datanode.DirectoryScanner.getVolumeReports() At 
DirectoryScanner.java:601 of value previously dereferenced in 
org.apache.hadoop.hdfs.server.datanode.DirectoryScanner.getVolumeReports() At 
DirectoryScanner.java:[line 601] 
       Nullcheck of volumeReferences at line 214 of value previously 
dereferenced in 
org.apache.hadoop.hdfs.server.datanode.DiskBalancer.getFsVolume(FsDatasetSpi, 
String) At DiskBalancer.java:214 of value previously dereferenced in 
org.apache.hadoop.hdfs.server.datanode.DiskBalancer.getFsVolume(FsDatasetSpi, 
String) At DiskBalancer.java:[line 214] 
       Nullcheck of dataIn at line 1233 of value previously dereferenced in 
org.apache.hadoop.hdfs.server.datanode.fsdataset.impl.FsDatasetImpl.computeChecksum(ReplicaInfo,
 File, int, Configuration) At FsDatasetImpl.java:1233 of value previously 
dereferenced in 
org.apache.hadoop.hdfs.server.datanode.fsdataset.impl.FsDatasetImpl.computeChecksum(ReplicaInfo,
 File, int, Configuration) At FsDatasetImpl.java:[line 1233] 
       Nullcheck of ref at line 243 of value previously dereferenced in 
org.apache.hadoop.hdfs.server.datanode.fsdataset.impl.RamDiskAsyncLazyPersistService$ReplicaLazyPersistTask.run()
 At RamDiskAsyncLazyPersistService.java:243 of value previously dereferenced in 
org.apache.hadoop.hdfs.server.datanode.fsdataset.impl.RamDiskAsyncLazyPersistService$ReplicaLazyPersistTask.run()
 At RamDiskAsyncLazyPersistService.java:[line 243] 
       Nullcheck of beforeStream at line 131 of value previously dereferenced 
in 
org.apache.hadoop.hdfs.server.diskbalancer.command.PlanCommand.execute(CommandLine)
 At PlanCommand.java:131 of value previously dereferenced in 
org.apache.hadoop.hdfs.server.diskbalancer.command.PlanCommand.execute(CommandLine)
 At PlanCommand.java:[line 131] 
       Nullcheck of planStream at line 162 of value previously dereferenced in 
org.apache.hadoop.hdfs.server.diskbalancer.command.PlanCommand.execute(CommandLine)
 At PlanCommand.java:162 of value previously dereferenced in 
org.apache.hadoop.hdfs.server.diskbalancer.command.PlanCommand.execute(CommandLine)
 At PlanCommand.java:[line 162] 
       Nullcheck of in at line 236 of value previously dereferenced in 
org.apache.hadoop.hdfs.web.ByteRangeInputStream.read(long, byte[], int, int) At 
ByteRangeInputStream.java:236 of value previously dereferenced in 
org.apache.hadoop.hdfs.web.ByteRangeInputStream.read(long, byte[], int, int) At 
ByteRangeInputStream.java:[line 236] 

    findbugs :

       module:hadoop-yarn-project/hadoop-yarn 
       Nullcheck of out at line 536 of value previously dereferenced in 
org.apache.hadoop.yarn.logaggregation.AggregatedLogFormat$LogWriter.append(AggregatedLogFormat$LogKey,
 AggregatedLogFormat$LogValue) At AggregatedLogFormat.java:536 of value 
previously dereferenced in 
org.apache.hadoop.yarn.logaggregation.AggregatedLogFormat$LogWriter.append(AggregatedLogFormat$LogKey,
 AggregatedLogFormat$LogValue) At AggregatedLogFormat.java:[line 536] 
       Nullcheck of out at line 519 of value previously dereferenced in 
org.apache.hadoop.yarn.logaggregation.AggregatedLogFormat$LogWriter.writeApplicationACLs(Map)
 At AggregatedLogFormat.java:519 of value previously dereferenced in 
org.apache.hadoop.yarn.logaggregation.AggregatedLogFormat$LogWriter.writeApplicationACLs(Map)
 At AggregatedLogFormat.java:[line 519] 
       Nullcheck of out at line 509 of value previously dereferenced in 
org.apache.hadoop.yarn.logaggregation.AggregatedLogFormat$LogWriter.writeApplicationOwner(String)
 At AggregatedLogFormat.java:509 of value previously dereferenced in 
org.apache.hadoop.yarn.logaggregation.AggregatedLogFormat$LogWriter.writeApplicationOwner(String)
 At AggregatedLogFormat.java:[line 509] 
       Nullcheck of out at line 512 of value previously dereferenced in 
org.apache.hadoop.yarn.logaggregation.AggregatedLogFormat$LogWriter.writeApplicationOwner(String)
 At AggregatedLogFormat.java:512 of value previously dereferenced in 
org.apache.hadoop.yarn.logaggregation.AggregatedLogFormat$LogWriter.writeApplicationOwner(String)
 At AggregatedLogFormat.java:[line 512] 
       Nullcheck of out at line 500 of value previously dereferenced in 
org.apache.hadoop.yarn.logaggregation.AggregatedLogFormat$LogWriter.writeVersion()
 At AggregatedLogFormat.java:500 of value previously dereferenced in 
org.apache.hadoop.yarn.logaggregation.AggregatedLogFormat$LogWriter.writeVersion()
 At AggregatedLogFormat.java:[line 500] 
       Nullcheck of out at line 503 of value previously dereferenced in 
org.apache.hadoop.yarn.logaggregation.AggregatedLogFormat$LogWriter.writeVersion()
 At AggregatedLogFormat.java:503 of value previously dereferenced in 
org.apache.hadoop.yarn.logaggregation.AggregatedLogFormat$LogWriter.writeVersion()
 At AggregatedLogFormat.java:[line 503] 
       Nullcheck of out at line 439 of value previously dereferenced in 
org.apache.hadoop.yarn.server.nodemanager.DefaultContainerExecutor$LocalWrapperScriptBuilder.writeLocalWrapperScript(Path,
 Path) At DefaultContainerExecutor.java:439 of value previously dereferenced in 
org.apache.hadoop.yarn.server.nodemanager.DefaultContainerExecutor$LocalWrapperScriptBuilder.writeLocalWrapperScript(Path,
 Path) At DefaultContainerExecutor.java:[line 439] 
       Nullcheck of out at line 510 of value previously dereferenced in 
org.apache.hadoop.yarn.server.nodemanager.DefaultContainerExecutor$UnixLocalWrapperScriptBuilder.writeSessionScript(Path,
 Path) At DefaultContainerExecutor.java:510 of value previously dereferenced in 
org.apache.hadoop.yarn.server.nodemanager.DefaultContainerExecutor$UnixLocalWrapperScriptBuilder.writeSessionScript(Path,
 Path) At DefaultContainerExecutor.java:[line 510] 
       Nullcheck of it at line 103 of value previously dereferenced in 
org.apache.hadoop.yarn.server.nodemanager.DeletionService.recover(NMStateStoreService$RecoveredDeletionServiceState)
 At DeletionService.java:103 of value previously dereferenced in 
org.apache.hadoop.yarn.server.nodemanager.DeletionService.recover(NMStateStoreService$RecoveredDeletionServiceState)
 At DeletionService.java:[line 103] 
       Nullcheck of rasIterator at line 371 of value previously dereferenced in 
org.apache.hadoop.yarn.server.nodemanager.containermanager.ContainerManagerImpl.recover()
 At ContainerManagerImpl.java:371 of value previously dereferenced in 
org.apache.hadoop.yarn.server.nodemanager.containermanager.ContainerManagerImpl.recover()
 At ContainerManagerImpl.java:[line 371] 
       Nullcheck of rcsIterator at line 380 of value previously dereferenced in 
org.apache.hadoop.yarn.server.nodemanager.containermanager.ContainerManagerImpl.recover()
 At ContainerManagerImpl.java:380 of value previously dereferenced in 
org.apache.hadoop.yarn.server.nodemanager.containermanager.ContainerManagerImpl.recover()
 At ContainerManagerImpl.java:[line 380] 
       Nullcheck of containerScriptOutStream at line 341 of value previously 
dereferenced in 
org.apache.hadoop.yarn.server.nodemanager.containermanager.launcher.ContainerLaunch.call()
 At ContainerLaunch.java:341 of value previously dereferenced in 
org.apache.hadoop.yarn.server.nodemanager.containermanager.launcher.ContainerLaunch.call()
 At ContainerLaunch.java:[line 341] 
       Nullcheck of keystoreOutStream at line 291 of value previously 
dereferenced in 
org.apache.hadoop.yarn.server.nodemanager.containermanager.launcher.ContainerLaunch.call()
 At ContainerLaunch.java:291 of value previously dereferenced in 
org.apache.hadoop.yarn.server.nodemanager.containermanager.launcher.ContainerLaunch.call()
 At ContainerLaunch.java:[line 291] 
       Nullcheck of truststoreOutStream at line 309 of value previously 
dereferenced in 
org.apache.hadoop.yarn.server.nodemanager.containermanager.launcher.ContainerLaunch.call()
 At ContainerLaunch.java:309 of value previously dereferenced in 
org.apache.hadoop.yarn.server.nodemanager.containermanager.launcher.ContainerLaunch.call()
 At ContainerLaunch.java:[line 309] 
       Nullcheck of stream at line 182 of value previously dereferenced in 
org.apache.hadoop.yarn.server.nodemanager.containermanager.linux.runtime.JavaSandboxLinuxContainerRuntime.initializePolicyDir()
 At JavaSandboxLinuxContainerRuntime.java:182 of value previously dereferenced 
in 
org.apache.hadoop.yarn.server.nodemanager.containermanager.linux.runtime.JavaSandboxLinuxContainerRuntime.initializePolicyDir()
 At JavaSandboxLinuxContainerRuntime.java:[line 182] 
       Redundant nullcheck of it, which is known to be non-null in 
org.apache.hadoop.yarn.server.nodemanager.containermanager.localizer.ResourceLocalizationService.recoverTrackerResources(LocalResourcesTracker,
 NMStateStoreService$LocalResourceTrackerState) Redundant null check at 
ResourceLocalizationService.java:is known to be non-null in 
org.apache.hadoop.yarn.server.nodemanager.containermanager.localizer.ResourceLocalizationService.recoverTrackerResources(LocalResourcesTracker,
 NMStateStoreService$LocalResourceTrackerState) Redundant null check at 
ResourceLocalizationService.java:[line 343] 
       Redundant nullcheck of it, which is known to be non-null in 
org.apache.hadoop.yarn.server.nodemanager.containermanager.localizer.ResourceLocalizationService.recoverTrackerResources(LocalResourcesTracker,
 NMStateStoreService$LocalResourceTrackerState) Redundant null check at 
ResourceLocalizationService.java:is known to be non-null in 
org.apache.hadoop.yarn.server.nodemanager.containermanager.localizer.ResourceLocalizationService.recoverTrackerResources(LocalResourcesTracker,
 NMStateStoreService$LocalResourceTrackerState) Redundant null check at 
ResourceLocalizationService.java:[line 356] 
       Nullcheck of it at line 307 of value previously dereferenced in 
org.apache.hadoop.yarn.server.nodemanager.containermanager.localizer.ResourceLocalizationService.recoverLocalizedResources(NMStateStoreService$RecoveredLocalizationState)
 At ResourceLocalizationService.java:307 of value previously dereferenced in 
org.apache.hadoop.yarn.server.nodemanager.containermanager.localizer.ResourceLocalizationService.recoverLocalizedResources(NMStateStoreService$RecoveredLocalizationState)
 At ResourceLocalizationService.java:[line 307] 
       Nullcheck of batch at line 1433 of value previously dereferenced in 
org.apache.hadoop.yarn.server.nodemanager.recovery.NMLeveldbStateStoreService.storeAssignedResources(Container,
 String, List) At NMLeveldbStateStoreService.java:1433 of value previously 
dereferenced in 
org.apache.hadoop.yarn.server.nodemanager.recovery.NMLeveldbStateStoreService.storeAssignedResources(Container,
 String, List) At NMLeveldbStateStoreService.java:[line 1433] 
       Nullcheck of batch at line 464 of value previously dereferenced in 
org.apache.hadoop.yarn.server.nodemanager.recovery.NMLeveldbStateStoreService.storeContainer(ContainerId,
 int, long, StartContainerRequest) At NMLeveldbStateStoreService.java:464 of 
value previously dereferenced in 
org.apache.hadoop.yarn.server.nodemanager.recovery.NMLeveldbStateStoreService.storeContainer(ContainerId,
 int, long, StartContainerRequest) At NMLeveldbStateStoreService.java:[line 
464] 
       Nullcheck of it at line 96 of value previously dereferenced in 
org.apache.hadoop.yarn.server.nodemanager.security.NMContainerTokenSecretManager.recover()
 At NMContainerTokenSecretManager.java:96 of value previously dereferenced in 
org.apache.hadoop.yarn.server.nodemanager.security.NMContainerTokenSecretManager.recover()
 At NMContainerTokenSecretManager.java:[line 96] 
       Nullcheck of it at line 94 of value previously dereferenced in 
org.apache.hadoop.yarn.server.nodemanager.security.NMTokenSecretManagerInNM.recover()
 At NMTokenSecretManagerInNM.java:94 of value previously dereferenced in 
org.apache.hadoop.yarn.server.nodemanager.security.NMTokenSecretManagerInNM.recover()
 At NMTokenSecretManagerInNM.java:[line 94] 
       Nullcheck of batch at line 596 of value previously dereferenced in 
org.apache.hadoop.yarn.server.resourcemanager.recovery.LeveldbRMStateStore.removeApplicationStateInternal(ApplicationStateData)
 At LeveldbRMStateStore.java:596 of value previously dereferenced in 
org.apache.hadoop.yarn.server.resourcemanager.recovery.LeveldbRMStateStore.removeApplicationStateInternal(ApplicationStateData)
 At LeveldbRMStateStore.java:[line 596] 
       Nullcheck of batch at line 637 of value previously dereferenced in 
org.apache.hadoop.yarn.server.resourcemanager.recovery.LeveldbRMStateStore.removeReservationState(String,
 String) At LeveldbRMStateStore.java:637 of value previously dereferenced in 
org.apache.hadoop.yarn.server.resourcemanager.recovery.LeveldbRMStateStore.removeReservationState(String,
 String) At LeveldbRMStateStore.java:[line 637] 
       Nullcheck of batch at line 655 of value previously dereferenced in 
org.apache.hadoop.yarn.server.resourcemanager.recovery.LeveldbRMStateStore.storeOrUpdateRMDT(RMDelegationTokenIdentifier,
 Long, boolean) At LeveldbRMStateStore.java:655 of value previously 
dereferenced in 
org.apache.hadoop.yarn.server.resourcemanager.recovery.LeveldbRMStateStore.storeOrUpdateRMDT(RMDelegationTokenIdentifier,
 Long, boolean) At LeveldbRMStateStore.java:[line 655] 
       Nullcheck of batch at line 746 of value previously dereferenced in 
org.apache.hadoop.yarn.server.resourcemanager.recovery.LeveldbRMStateStore.storeProxyCACertState(X509Certificate,
 PrivateKey) At LeveldbRMStateStore.java:746 of value previously dereferenced 
in 
org.apache.hadoop.yarn.server.resourcemanager.recovery.LeveldbRMStateStore.storeProxyCACertState(X509Certificate,
 PrivateKey) At LeveldbRMStateStore.java:[line 746] 
       Nullcheck of batch at line 622 of value previously dereferenced in 
org.apache.hadoop.yarn.server.resourcemanager.recovery.LeveldbRMStateStore.storeReservationState(YarnProtos$ReservationAllocationStateProto,
 String, String) At LeveldbRMStateStore.java:622 of value previously 
dereferenced in 
org.apache.hadoop.yarn.server.resourcemanager.recovery.LeveldbRMStateStore.storeReservationState(YarnProtos$ReservationAllocationStateProto,
 String, String) At LeveldbRMStateStore.java:[line 622] 
       Nullcheck of in at line 268 of value previously dereferenced in 
org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.conf.FSSchedulerConfigurationStore.getConfigVersion()
 At FSSchedulerConfigurationStore.java:268 of value previously dereferenced in 
org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.conf.FSSchedulerConfigurationStore.getConfigVersion()
 At FSSchedulerConfigurationStore.java:[line 268] 
       Nullcheck of out at line 258 of value previously dereferenced in 
org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.conf.FSSchedulerConfigurationStore.writeConfigVersion(long)
 At FSSchedulerConfigurationStore.java:258 of value previously dereferenced in 
org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.conf.FSSchedulerConfigurationStore.writeConfigVersion(long)
 At FSSchedulerConfigurationStore.java:[line 258] 
       Nullcheck of entityIterator at line 176 of value previously dereferenced 
in 
org.apache.hadoop.yarn.server.timeline.KeyValueBasedTimelineStore.getEntities(String,
 Long, Long, Long, String, Long, NameValuePair, Collection, EnumSet, 
TimelineDataManager$CheckAcl) At KeyValueBasedTimelineStore.java:176 of value 
previously dereferenced in 
org.apache.hadoop.yarn.server.timeline.KeyValueBasedTimelineStore.getEntities(String,
 Long, Long, Long, String, Long, NameValuePair, Collection, EnumSet, 
TimelineDataManager$CheckAcl) At KeyValueBasedTimelineStore.java:[line 131] 
       Nullcheck of iterator at line 1503 of value previously dereferenced in 
org.apache.hadoop.yarn.server.timeline.RollingLevelDBTimelineStore.evictOldStartTimes(long)
 At RollingLevelDBTimelineStore.java:1503 of value previously dereferenced in 
org.apache.hadoop.yarn.server.timeline.RollingLevelDBTimelineStore.evictOldStartTimes(long)
 At RollingLevelDBTimelineStore.java:[line 1503] 
       Nullcheck of iterator at line 1733 of value previously dereferenced in 
org.apache.hadoop.yarn.server.timeline.RollingLevelDBTimelineStore.getDomain(String)
 At RollingLevelDBTimelineStore.java:1733 of value previously dereferenced in 
org.apache.hadoop.yarn.server.timeline.RollingLevelDBTimelineStore.getDomain(String)
 At RollingLevelDBTimelineStore.java:[line 1733] 
       Nullcheck of iterator at line 1742 of value previously dereferenced in 
org.apache.hadoop.yarn.server.timeline.RollingLevelDBTimelineStore.getDomains(String)
 At RollingLevelDBTimelineStore.java:1742 of value previously dereferenced in 
org.apache.hadoop.yarn.server.timeline.RollingLevelDBTimelineStore.getDomains(String)
 At RollingLevelDBTimelineStore.java:[line 1742] 
       Nullcheck of iterator at line 429 of value previously dereferenced in 
org.apache.hadoop.yarn.server.timeline.RollingLevelDBTimelineStore.getEntity(String,
 String, EnumSet) At RollingLevelDBTimelineStore.java:429 of value previously 
dereferenced in 
org.apache.hadoop.yarn.server.timeline.RollingLevelDBTimelineStore.getEntity(String,
 String, EnumSet) At RollingLevelDBTimelineStore.java:[line 429] 
       Nullcheck of iterator at line 737 of value previously dereferenced in 
org.apache.hadoop.yarn.server.timeline.RollingLevelDBTimelineStore.getEntityByTime(byte[],
 String, Long, Long, Long, String, Long, Collection, EnumSet, 
TimelineDataManager$CheckAcl, boolean) At RollingLevelDBTimelineStore.java:737 
of value previously dereferenced in 
org.apache.hadoop.yarn.server.timeline.RollingLevelDBTimelineStore.getEntityByTime(byte[],
 String, Long, Long, Long, String, Long, Collection, EnumSet, 
TimelineDataManager$CheckAcl, boolean) At 
RollingLevelDBTimelineStore.java:[line 737] 
       Nullcheck of iterator at line 607 of value previously dereferenced in 
org.apache.hadoop.yarn.server.timeline.RollingLevelDBTimelineStore.getEntityTimelines(String,
 SortedSet, Long, Long, Long, Set) At RollingLevelDBTimelineStore.java:607 of 
value previously dereferenced in 
org.apache.hadoop.yarn.server.timeline.RollingLevelDBTimelineStore.getEntityTimelines(String,
 SortedSet, Long, Long, Long, Set) At RollingLevelDBTimelineStore.java:[line 
607] 
       Nullcheck of domainWriteBatch at line 1645 of value previously 
dereferenced in 
org.apache.hadoop.yarn.server.timeline.RollingLevelDBTimelineStore.put(TimelineDomain)
 At RollingLevelDBTimelineStore.java:1645 of value previously dereferenced in 
org.apache.hadoop.yarn.server.timeline.RollingLevelDBTimelineStore.put(TimelineDomain)
 At RollingLevelDBTimelineStore.java:[line 1645] 
       Nullcheck of ownerWriteBatch at line 1646 of value previously 
dereferenced in 
org.apache.hadoop.yarn.server.timeline.RollingLevelDBTimelineStore.put(TimelineDomain)
 At RollingLevelDBTimelineStore.java:1646 of value previously dereferenced in 
org.apache.hadoop.yarn.server.timeline.RollingLevelDBTimelineStore.put(TimelineDomain)
 At RollingLevelDBTimelineStore.java:[line 1646] 
       Nullcheck of localFS at line 294 of value previously dereferenced in 
org.apache.hadoop.yarn.server.timeline.RollingLevelDBTimelineStore.serviceInit(Configuration)
 At RollingLevelDBTimelineStore.java:294 of value previously dereferenced in 
org.apache.hadoop.yarn.server.timeline.RollingLevelDBTimelineStore.serviceInit(Configuration)
 At RollingLevelDBTimelineStore.java:[line 294] 
       Boxed value is unboxed and then immediately reboxed in 
org.apache.hadoop.yarn.server.timelineservice.storage.common.ColumnRWHelper.readResultsWithTimestamps(Result,
 byte[], byte[], KeyConverter, ValueConverter, boolean) At 
ColumnRWHelper.java:then immediately reboxed in 
org.apache.hadoop.yarn.server.timelineservice.storage.common.ColumnRWHelper.readResultsWithTimestamps(Result,
 byte[], byte[], KeyConverter, ValueConverter, boolean) At 
ColumnRWHelper.java:[line 333] 
       Nullcheck of fs at line 75 of value previously dereferenced in 
org.apache.hadoop.yarn.server.timelineservice.storage.common.HBaseTimelineStorageUtils.getTimelineServiceHBaseConf(Configuration)
 At HBaseTimelineStorageUtils.java:75 of value previously dereferenced in 
org.apache.hadoop.yarn.server.timelineservice.storage.common.HBaseTimelineStorageUtils.getTimelineServiceHBaseConf(Configuration)
 At HBaseTimelineStorageUtils.java:[line 75] 
       Nullcheck of results at line 95 of value previously dereferenced in 
org.apache.hadoop.yarn.server.timelineservice.storage.reader.EntityTypeReader.readEntityTypes(Configuration,
 Connection) At EntityTypeReader.java:95 of value previously dereferenced in 
org.apache.hadoop.yarn.server.timelineservice.storage.reader.EntityTypeReader.readEntityTypes(Configuration,
 Connection) At EntityTypeReader.java:[line 95] 
       Nullcheck of os at line 401 of value previously dereferenced in 
org.apache.hadoop.yarn.service.provider.ProviderUtils.resolvePropsInConfigFileAndSaveOnHdfs(SliderFileSystem,
 Map, ComponentInstance, ConfigFile, String, Path) At ProviderUtils.java:401 of 
value previously dereferenced in 
org.apache.hadoop.yarn.service.provider.ProviderUtils.resolvePropsInConfigFileAndSaveOnHdfs(SliderFileSystem,
 Map, ComponentInstance, ConfigFile, String, Path) At ProviderUtils.java:[line 
401] 
       Redundant nullcheck of resStream, which is known to be non-null in 
org.apache.hadoop.yarn.service.utils.JsonSerDeser.fromResource(String) 
Redundant null check at JsonSerDeser.java:is known to be non-null in 
org.apache.hadoop.yarn.service.utils.JsonSerDeser.fromResource(String) 
Redundant null check at JsonSerDeser.java:[line 123] 

    findbugs :

       module:hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common 
       Nullcheck of out at line 536 of value previously dereferenced in 
org.apache.hadoop.yarn.logaggregation.AggregatedLogFormat$LogWriter.append(AggregatedLogFormat$LogKey,
 AggregatedLogFormat$LogValue) At AggregatedLogFormat.java:536 of value 
previously dereferenced in 
org.apache.hadoop.yarn.logaggregation.AggregatedLogFormat$LogWriter.append(AggregatedLogFormat$LogKey,
 AggregatedLogFormat$LogValue) At AggregatedLogFormat.java:[line 536] 
       Nullcheck of out at line 519 of value previously dereferenced in 
org.apache.hadoop.yarn.logaggregation.AggregatedLogFormat$LogWriter.writeApplicationACLs(Map)
 At AggregatedLogFormat.java:519 of value previously dereferenced in 
org.apache.hadoop.yarn.logaggregation.AggregatedLogFormat$LogWriter.writeApplicationACLs(Map)
 At AggregatedLogFormat.java:[line 519] 
       Nullcheck of out at line 509 of value previously dereferenced in 
org.apache.hadoop.yarn.logaggregation.AggregatedLogFormat$LogWriter.writeApplicationOwner(String)
 At AggregatedLogFormat.java:509 of value previously dereferenced in 
org.apache.hadoop.yarn.logaggregation.AggregatedLogFormat$LogWriter.writeApplicationOwner(String)
 At AggregatedLogFormat.java:[line 509] 
       Nullcheck of out at line 512 of value previously dereferenced in 
org.apache.hadoop.yarn.logaggregation.AggregatedLogFormat$LogWriter.writeApplicationOwner(String)
 At AggregatedLogFormat.java:512 of value previously dereferenced in 
org.apache.hadoop.yarn.logaggregation.AggregatedLogFormat$LogWriter.writeApplicationOwner(String)
 At AggregatedLogFormat.java:[line 512] 
       Nullcheck of out at line 500 of value previously dereferenced in 
org.apache.hadoop.yarn.logaggregation.AggregatedLogFormat$LogWriter.writeVersion()
 At AggregatedLogFormat.java:500 of value previously dereferenced in 
org.apache.hadoop.yarn.logaggregation.AggregatedLogFormat$LogWriter.writeVersion()
 At AggregatedLogFormat.java:[line 500] 
       Nullcheck of out at line 503 of value previously dereferenced in 
org.apache.hadoop.yarn.logaggregation.AggregatedLogFormat$LogWriter.writeVersion()
 At AggregatedLogFormat.java:503 of value previously dereferenced in 
org.apache.hadoop.yarn.logaggregation.AggregatedLogFormat$LogWriter.writeVersion()
 At AggregatedLogFormat.java:[line 503] 

    findbugs :

       module:hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server 
       Nullcheck of out at line 439 of value previously dereferenced in 
org.apache.hadoop.yarn.server.nodemanager.DefaultContainerExecutor$LocalWrapperScriptBuilder.writeLocalWrapperScript(Path,
 Path) At DefaultContainerExecutor.java:439 of value previously dereferenced in 
org.apache.hadoop.yarn.server.nodemanager.DefaultContainerExecutor$LocalWrapperScriptBuilder.writeLocalWrapperScript(Path,
 Path) At DefaultContainerExecutor.java:[line 439] 
       Nullcheck of out at line 510 of value previously dereferenced in 
org.apache.hadoop.yarn.server.nodemanager.DefaultContainerExecutor$UnixLocalWrapperScriptBuilder.writeSessionScript(Path,
 Path) At DefaultContainerExecutor.java:510 of value previously dereferenced in 
org.apache.hadoop.yarn.server.nodemanager.DefaultContainerExecutor$UnixLocalWrapperScriptBuilder.writeSessionScript(Path,
 Path) At DefaultContainerExecutor.java:[line 510] 
       Nullcheck of it at line 103 of value previously dereferenced in 
org.apache.hadoop.yarn.server.nodemanager.DeletionService.recover(NMStateStoreService$RecoveredDeletionServiceState)
 At DeletionService.java:103 of value previously dereferenced in 
org.apache.hadoop.yarn.server.nodemanager.DeletionService.recover(NMStateStoreService$RecoveredDeletionServiceState)
 At DeletionService.java:[line 103] 
       Nullcheck of rasIterator at line 371 of value previously dereferenced in 
org.apache.hadoop.yarn.server.nodemanager.containermanager.ContainerManagerImpl.recover()
 At ContainerManagerImpl.java:371 of value previously dereferenced in 
org.apache.hadoop.yarn.server.nodemanager.containermanager.ContainerManagerImpl.recover()
 At ContainerManagerImpl.java:[line 371] 
       Nullcheck of rcsIterator at line 380 of value previously dereferenced in 
org.apache.hadoop.yarn.server.nodemanager.containermanager.ContainerManagerImpl.recover()
 At ContainerManagerImpl.java:380 of value previously dereferenced in 
org.apache.hadoop.yarn.server.nodemanager.containermanager.ContainerManagerImpl.recover()
 At ContainerManagerImpl.java:[line 380] 
       Nullcheck of containerScriptOutStream at line 341 of value previously 
dereferenced in 
org.apache.hadoop.yarn.server.nodemanager.containermanager.launcher.ContainerLaunch.call()
 At ContainerLaunch.java:341 of value previously dereferenced in 
org.apache.hadoop.yarn.server.nodemanager.containermanager.launcher.ContainerLaunch.call()
 At ContainerLaunch.java:[line 341] 
       Nullcheck of keystoreOutStream at line 291 of value previously 
dereferenced in 
org.apache.hadoop.yarn.server.nodemanager.containermanager.launcher.ContainerLaunch.call()
 At ContainerLaunch.java:291 of value previously dereferenced in 
org.apache.hadoop.yarn.server.nodemanager.containermanager.launcher.ContainerLaunch.call()
 At ContainerLaunch.java:[line 291] 
       Nullcheck of truststoreOutStream at line 309 of value previously 
dereferenced in 
org.apache.hadoop.yarn.server.nodemanager.containermanager.launcher.ContainerLaunch.call()
 At ContainerLaunch.java:309 of value previously dereferenced in 
org.apache.hadoop.yarn.server.nodemanager.containermanager.launcher.ContainerLaunch.call()
 At ContainerLaunch.java:[line 309] 
       Nullcheck of stream at line 182 of value previously dereferenced in 
org.apache.hadoop.yarn.server.nodemanager.containermanager.linux.runtime.JavaSandboxLinuxContainerRuntime.initializePolicyDir()
 At JavaSandboxLinuxContainerRuntime.java:182 of value previously dereferenced 
in 
org.apache.hadoop.yarn.server.nodemanager.containermanager.linux.runtime.JavaSandboxLinuxContainerRuntime.initializePolicyDir()
 At JavaSandboxLinuxContainerRuntime.java:[line 182] 
       Redundant nullcheck of it, which is known to be non-null in 
org.apache.hadoop.yarn.server.nodemanager.containermanager.localizer.ResourceLocalizationService.recoverTrackerResources(LocalResourcesTracker,
 NMStateStoreService$LocalResourceTrackerState) Redundant null check at 
ResourceLocalizationService.java:is known to be non-null in 
org.apache.hadoop.yarn.server.nodemanager.containermanager.localizer.ResourceLocalizationService.recoverTrackerResources(LocalResourcesTracker,
 NMStateStoreService$LocalResourceTrackerState) Redundant null check at 
ResourceLocalizationService.java:[line 343] 
       Redundant nullcheck of it, which is known to be non-null in 
org.apache.hadoop.yarn.server.nodemanager.containermanager.localizer.ResourceLocalizationService.recoverTrackerResources(LocalResourcesTracker,
 NMStateStoreService$LocalResourceTrackerState) Redundant null check at 
ResourceLocalizationService.java:is known to be non-null in 
org.apache.hadoop.yarn.server.nodemanager.containermanager.localizer.ResourceLocalizationService.recoverTrackerResources(LocalResourcesTracker,
 NMStateStoreService$LocalResourceTrackerState) Redundant null check at 
ResourceLocalizationService.java:[line 356] 
       Nullcheck of it at line 307 of value previously dereferenced in 
org.apache.hadoop.yarn.server.nodemanager.containermanager.localizer.ResourceLocalizationService.recoverLocalizedResources(NMStateStoreService$RecoveredLocalizationState)
 At ResourceLocalizationService.java:307 of value previously dereferenced in 
org.apache.hadoop.yarn.server.nodemanager.containermanager.localizer.ResourceLocalizationService.recoverLocalizedResources(NMStateStoreService$RecoveredLocalizationState)
 At ResourceLocalizationService.java:[line 307] 
       Nullcheck of batch at line 1433 of value previously dereferenced in 
org.apache.hadoop.yarn.server.nodemanager.recovery.NMLeveldbStateStoreService.storeAssignedResources(Container,
 String, List) At NMLeveldbStateStoreService.java:1433 of value previously 
dereferenced in 
org.apache.hadoop.yarn.server.nodemanager.recovery.NMLeveldbStateStoreService.storeAssignedResources(Container,
 String, List) At NMLeveldbStateStoreService.java:[line 1433] 
       Nullcheck of batch at line 464 of value previously dereferenced in 
org.apache.hadoop.yarn.server.nodemanager.recovery.NMLeveldbStateStoreService.storeContainer(ContainerId,
 int, long, StartContainerRequest) At NMLeveldbStateStoreService.java:464 of 
value previously dereferenced in 
org.apache.hadoop.yarn.server.nodemanager.recovery.NMLeveldbStateStoreService.storeContainer(ContainerId,
 int, long, StartContainerRequest) At NMLeveldbStateStoreService.java:[line 
464] 
       Nullcheck of it at line 96 of value previously dereferenced in 
org.apache.hadoop.yarn.server.nodemanager.security.NMContainerTokenSecretManager.recover()
 At NMContainerTokenSecretManager.java:96 of value previously dereferenced in 
org.apache.hadoop.yarn.server.nodemanager.security.NMContainerTokenSecretManager.recover()
 At NMContainerTokenSecretManager.java:[line 96] 
       Nullcheck of it at line 94 of value previously dereferenced in 
org.apache.hadoop.yarn.server.nodemanager.security.NMTokenSecretManagerInNM.recover()
 At NMTokenSecretManagerInNM.java:94 of value previously dereferenced in 
org.apache.hadoop.yarn.server.nodemanager.security.NMTokenSecretManagerInNM.recover()
 At NMTokenSecretManagerInNM.java:[line 94] 
       Nullcheck of batch at line 596 of value previously dereferenced in 
org.apache.hadoop.yarn.server.resourcemanager.recovery.LeveldbRMStateStore.removeApplicationStateInternal(ApplicationStateData)
 At LeveldbRMStateStore.java:596 of value previously dereferenced in 
org.apache.hadoop.yarn.server.resourcemanager.recovery.LeveldbRMStateStore.removeApplicationStateInternal(ApplicationStateData)
 At LeveldbRMStateStore.java:[line 596] 
       Nullcheck of batch at line 637 of value previously dereferenced in 
org.apache.hadoop.yarn.server.resourcemanager.recovery.LeveldbRMStateStore.removeReservationState(String,
 String) At LeveldbRMStateStore.java:637 of value previously dereferenced in 
org.apache.hadoop.yarn.server.resourcemanager.recovery.LeveldbRMStateStore.removeReservationState(String,
 String) At LeveldbRMStateStore.java:[line 637] 
       Nullcheck of batch at line 655 of value previously dereferenced in 
org.apache.hadoop.yarn.server.resourcemanager.recovery.LeveldbRMStateStore.storeOrUpdateRMDT(RMDelegationTokenIdentifier,
 Long, boolean) At LeveldbRMStateStore.java:655 of value previously 
dereferenced in 
org.apache.hadoop.yarn.server.resourcemanager.recovery.LeveldbRMStateStore.storeOrUpdateRMDT(RMDelegationTokenIdentifier,
 Long, boolean) At LeveldbRMStateStore.java:[line 655] 
       Nullcheck of batch at line 746 of value previously dereferenced in 
org.apache.hadoop.yarn.server.resourcemanager.recovery.LeveldbRMStateStore.storeProxyCACertState(X509Certificate,
 PrivateKey) At LeveldbRMStateStore.java:746 of value previously dereferenced 
in 
org.apache.hadoop.yarn.server.resourcemanager.recovery.LeveldbRMStateStore.storeProxyCACertState(X509Certificate,
 PrivateKey) At LeveldbRMStateStore.java:[line 746] 
       Nullcheck of batch at line 622 of value previously dereferenced in 
org.apache.hadoop.yarn.server.resourcemanager.recovery.LeveldbRMStateStore.storeReservationState(YarnProtos$ReservationAllocationStateProto,
 String, String) At LeveldbRMStateStore.java:622 of value previously 
dereferenced in 
org.apache.hadoop.yarn.server.resourcemanager.recovery.LeveldbRMStateStore.storeReservationState(YarnProtos$ReservationAllocationStateProto,
 String, String) At LeveldbRMStateStore.java:[line 622] 
       Nullcheck of in at line 268 of value previously dereferenced in 
org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.conf.FSSchedulerConfigurationStore.getConfigVersion()
 At FSSchedulerConfigurationStore.java:268 of value previously dereferenced in 
org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.conf.FSSchedulerConfigurationStore.getConfigVersion()
 At FSSchedulerConfigurationStore.java:[line 268] 
       Nullcheck of out at line 258 of value previously dereferenced in 
org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.conf.FSSchedulerConfigurationStore.writeConfigVersion(long)
 At FSSchedulerConfigurationStore.java:258 of value previously dereferenced in 
org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.conf.FSSchedulerConfigurationStore.writeConfigVersion(long)
 At FSSchedulerConfigurationStore.java:[line 258] 
       Nullcheck of entityIterator at line 176 of value previously dereferenced 
in 
org.apache.hadoop.yarn.server.timeline.KeyValueBasedTimelineStore.getEntities(String,
 Long, Long, Long, String, Long, NameValuePair, Collection, EnumSet, 
TimelineDataManager$CheckAcl) At KeyValueBasedTimelineStore.java:176 of value 
previously dereferenced in 
org.apache.hadoop.yarn.server.timeline.KeyValueBasedTimelineStore.getEntities(String,
 Long, Long, Long, String, Long, NameValuePair, Collection, EnumSet, 
TimelineDataManager$CheckAcl) At KeyValueBasedTimelineStore.java:[line 131] 
       Nullcheck of iterator at line 1503 of value previously dereferenced in 
org.apache.hadoop.yarn.server.timeline.RollingLevelDBTimelineStore.evictOldStartTimes(long)
 At RollingLevelDBTimelineStore.java:1503 of value previously dereferenced in 
org.apache.hadoop.yarn.server.timeline.RollingLevelDBTimelineStore.evictOldStartTimes(long)
 At RollingLevelDBTimelineStore.java:[line 1503] 
       Nullcheck of iterator at line 1733 of value previously dereferenced in 
org.apache.hadoop.yarn.server.timeline.RollingLevelDBTimelineStore.getDomain(String)
 At RollingLevelDBTimelineStore.java:1733 of value previously dereferenced in 
org.apache.hadoop.yarn.server.timeline.RollingLevelDBTimelineStore.getDomain(String)
 At RollingLevelDBTimelineStore.java:[line 1733] 
       Nullcheck of iterator at line 1742 of value previously dereferenced in 
org.apache.hadoop.yarn.server.timeline.RollingLevelDBTimelineStore.getDomains(String)
 At RollingLevelDBTimelineStore.java:1742 of value previously dereferenced in 
org.apache.hadoop.yarn.server.timeline.RollingLevelDBTimelineStore.getDomains(String)
 At RollingLevelDBTimelineStore.java:[line 1742] 
       Nullcheck of iterator at line 429 of value previously dereferenced in 
org.apache.hadoop.yarn.server.timeline.RollingLevelDBTimelineStore.getEntity(String,
 String, EnumSet) At RollingLevelDBTimelineStore.java:429 of value previously 
dereferenced in 
org.apache.hadoop.yarn.server.timeline.RollingLevelDBTimelineStore.getEntity(String,
 String, EnumSet) At RollingLevelDBTimelineStore.java:[line 429] 
       Nullcheck of iterator at line 737 of value previously dereferenced in 
org.apache.hadoop.yarn.server.timeline.RollingLevelDBTimelineStore.getEntityByTime(byte[],
 String, Long, Long, Long, String, Long, Collection, EnumSet, 
TimelineDataManager$CheckAcl, boolean) At RollingLevelDBTimelineStore.java:737 
of value previously dereferenced in 
org.apache.hadoop.yarn.server.timeline.RollingLevelDBTimelineStore.getEntityByTime(byte[],
 String, Long, Long, Long, String, Long, Collection, EnumSet, 
TimelineDataManager$CheckAcl, boolean) At 
RollingLevelDBTimelineStore.java:[line 737] 
       Nullcheck of iterator at line 607 of value previously dereferenced in 
org.apache.hadoop.yarn.server.timeline.RollingLevelDBTimelineStore.getEntityTimelines(String,
 SortedSet, Long, Long, Long, Set) At RollingLevelDBTimelineStore.java:607 of 
value previously dereferenced in 
org.apache.hadoop.yarn.server.timeline.RollingLevelDBTimelineStore.getEntityTimelines(String,
 SortedSet, Long, Long, Long, Set) At RollingLevelDBTimelineStore.java:[line 
607] 
       Nullcheck of domainWriteBatch at line 1645 of value previously 
dereferenced in 
org.apache.hadoop.yarn.server.timeline.RollingLevelDBTimelineStore.put(TimelineDomain)
 At RollingLevelDBTimelineStore.java:1645 of value previously dereferenced in 
org.apache.hadoop.yarn.server.timeline.RollingLevelDBTimelineStore.put(TimelineDomain)
 At RollingLevelDBTimelineStore.java:[line 1645] 
       Nullcheck of ownerWriteBatch at line 1646 of value previously 
dereferenced in 
org.apache.hadoop.yarn.server.timeline.RollingLevelDBTimelineStore.put(TimelineDomain)
 At RollingLevelDBTimelineStore.java:1646 of value previously dereferenced in 
org.apache.hadoop.yarn.server.timeline.RollingLevelDBTimelineStore.put(TimelineDomain)
 At RollingLevelDBTimelineStore.java:[line 1646] 
       Nullcheck of localFS at line 294 of value previously dereferenced in 
org.apache.hadoop.yarn.server.timeline.RollingLevelDBTimelineStore.serviceInit(Configuration)
 At RollingLevelDBTimelineStore.java:294 of value previously dereferenced in 
org.apache.hadoop.yarn.server.timeline.RollingLevelDBTimelineStore.serviceInit(Configuration)
 At RollingLevelDBTimelineStore.java:[line 294] 
       Boxed value is unboxed and then immediately reboxed in 
org.apache.hadoop.yarn.server.timelineservice.storage.common.ColumnRWHelper.readResultsWithTimestamps(Result,
 byte[], byte[], KeyConverter, ValueConverter, boolean) At 
ColumnRWHelper.java:then immediately reboxed in 
org.apache.hadoop.yarn.server.timelineservice.storage.common.ColumnRWHelper.readResultsWithTimestamps(Result,
 byte[], byte[], KeyConverter, ValueConverter, boolean) At 
ColumnRWHelper.java:[line 333] 
       Nullcheck of fs at line 75 of value previously dereferenced in 
org.apache.hadoop.yarn.server.timelineservice.storage.common.HBaseTimelineStorageUtils.getTimelineServiceHBaseConf(Configuration)
 At HBaseTimelineStorageUtils.java:75 of value previously dereferenced in 
org.apache.hadoop.yarn.server.timelineservice.storage.common.HBaseTimelineStorageUtils.getTimelineServiceHBaseConf(Configuration)
 At HBaseTimelineStorageUtils.java:[line 75] 
       Nullcheck of results at line 95 of value previously dereferenced in 
org.apache.hadoop.yarn.server.timelineservice.storage.reader.EntityTypeReader.readEntityTypes(Configuration,
 Connection) At EntityTypeReader.java:95 of value previously dereferenced in 
org.apache.hadoop.yarn.server.timelineservice.storage.reader.EntityTypeReader.readEntityTypes(Configuration,
 Connection) At EntityTypeReader.java:[line 95] 

    findbugs :

       
module:hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager
 
       Nullcheck of out at line 439 of value previously dereferenced in 
org.apache.hadoop.yarn.server.nodemanager.DefaultContainerExecutor$LocalWrapperScriptBuilder.writeLocalWrapperScript(Path,
 Path) At DefaultContainerExecutor.java:439 of value previously dereferenced in 
org.apache.hadoop.yarn.server.nodemanager.DefaultContainerExecutor$LocalWrapperScriptBuilder.writeLocalWrapperScript(Path,
 Path) At DefaultContainerExecutor.java:[line 439] 
       Nullcheck of out at line 510 of value previously dereferenced in 
org.apache.hadoop.yarn.server.nodemanager.DefaultContainerExecutor$UnixLocalWrapperScriptBuilder.writeSessionScript(Path,
 Path) At DefaultContainerExecutor.java:510 of value previously dereferenced in 
org.apache.hadoop.yarn.server.nodemanager.DefaultContainerExecutor$UnixLocalWrapperScriptBuilder.writeSessionScript(Path,
 Path) At DefaultContainerExecutor.java:[line 510] 
       Nullcheck of it at line 103 of value previously dereferenced in 
org.apache.hadoop.yarn.server.nodemanager.DeletionService.recover(NMStateStoreService$RecoveredDeletionServiceState)
 At DeletionService.java:103 of value previously dereferenced in 
org.apache.hadoop.yarn.server.nodemanager.DeletionService.recover(NMStateStoreService$RecoveredDeletionServiceState)
 At DeletionService.java:[line 103] 
       Nullcheck of rasIterator at line 371 of value previously dereferenced in 
org.apache.hadoop.yarn.server.nodemanager.containermanager.ContainerManagerImpl.recover()
 At ContainerManagerImpl.java:371 of value previously dereferenced in 
org.apache.hadoop.yarn.server.nodemanager.containermanager.ContainerManagerImpl.recover()
 At ContainerManagerImpl.java:[line 371] 
       Nullcheck of rcsIterator at line 380 of value previously dereferenced in 
org.apache.hadoop.yarn.server.nodemanager.containermanager.ContainerManagerImpl.recover()
 At ContainerManagerImpl.java:380 of value previously dereferenced in 
org.apache.hadoop.yarn.server.nodemanager.containermanager.ContainerManagerImpl.recover()
 At ContainerManagerImpl.java:[line 380] 
       Nullcheck of containerScriptOutStream at line 341 of value previously 
dereferenced in 
org.apache.hadoop.yarn.server.nodemanager.containermanager.launcher.ContainerLaunch.call()
 At ContainerLaunch.java:341 of value previously dereferenced in 
org.apache.hadoop.yarn.server.nodemanager.containermanager.launcher.ContainerLaunch.call()
 At ContainerLaunch.java:[line 341] 
       Nullcheck of keystoreOutStream at line 291 of value previously 
dereferenced in 
org.apache.hadoop.yarn.server.nodemanager.containermanager.launcher.ContainerLaunch.call()
 At ContainerLaunch.java:291 of value previously dereferenced in 
org.apache.hadoop.yarn.server.nodemanager.containermanager.launcher.ContainerLaunch.call()
 At ContainerLaunch.java:[line 291] 
       Nullcheck of truststoreOutStream at line 309 of value previously 
dereferenced in 
org.apache.hadoop.yarn.server.nodemanager.containermanager.launcher.ContainerLaunch.call()
 At ContainerLaunch.java:309 of value previously dereferenced in 
org.apache.hadoop.yarn.server.nodemanager.containermanager.launcher.ContainerLaunch.call()
 At ContainerLaunch.java:[line 309] 
       Nullcheck of stream at line 182 of value previously dereferenced in 
org.apache.hadoop.yarn.server.nodemanager.containermanager.linux.runtime.JavaSandboxLinuxContainerRuntime.initializePolicyDir()
 At JavaSandboxLinuxContainerRuntime.java:182 of value previously dereferenced 
in 
org.apache.hadoop.yarn.server.nodemanager.containermanager.linux.runtime.JavaSandboxLinuxContainerRuntime.initializePolicyDir()
 At JavaSandboxLinuxContainerRuntime.java:[line 182] 
       Redundant nullcheck of it, which is known to be non-null in 
org.apache.hadoop.yarn.server.nodemanager.containermanager.localizer.ResourceLocalizationService.recoverTrackerResources(LocalResourcesTracker,
 NMStateStoreService$LocalResourceTrackerState) Redundant null check at 
ResourceLocalizationService.java:is known to be non-null in 
org.apache.hadoop.yarn.server.nodemanager.containermanager.localizer.ResourceLocalizationService.recoverTrackerResources(LocalResourcesTracker,
 NMStateStoreService$LocalResourceTrackerState) Redundant null check at 
ResourceLocalizationService.java:[line 343] 
       Redundant nullcheck of it, which is known to be non-null in 
org.apache.hadoop.yarn.server.nodemanager.containermanager.localizer.ResourceLocalizationService.recoverTrackerResources(LocalResourcesTracker,
 NMStateStoreService$LocalResourceTrackerState) Redundant null check at 
ResourceLocalizationService.java:is known to be non-null in 
org.apache.hadoop.yarn.server.nodemanager.containermanager.localizer.ResourceLocalizationService.recoverTrackerResources(LocalResourcesTracker,
 NMStateStoreService$LocalResourceTrackerState) Redundant null check at 
ResourceLocalizationService.java:[line 356] 
       Nullcheck of it at line 307 of value previously dereferenced in 
org.apache.hadoop.yarn.server.nodemanager.containermanager.localizer.ResourceLocalizationService.recoverLocalizedResources(NMStateStoreService$RecoveredLocalizationState)
 At ResourceLocalizationService.java:307 of value previously dereferenced in 
org.apache.hadoop.yarn.server.nodemanager.containermanager.localizer.ResourceLocalizationService.recoverLocalizedResources(NMStateStoreService$RecoveredLocalizationState)
 At ResourceLocalizationService.java:[line 307] 
       Nullcheck of batch at line 1433 of value previously dereferenced in 
org.apache.hadoop.yarn.server.nodemanager.recovery.NMLeveldbStateStoreService.storeAssignedResources(Container,
 String, List) At NMLeveldbStateStoreService.java:1433 of value previously 
dereferenced in 
org.apache.hadoop.yarn.server.nodemanager.recovery.NMLeveldbStateStoreService.storeAssignedResources(Container,
 String, List) At NMLeveldbStateStoreService.java:[line 1433] 
       Nullcheck of batch at line 464 of value previously dereferenced in 
org.apache.hadoop.yarn.server.nodemanager.recovery.NMLeveldbStateStoreService.storeContainer(ContainerId,
 int, long, StartContainerRequest) At NMLeveldbStateStoreService.java:464 of 
value previously dereferenced in 
org.apache.hadoop.yarn.server.nodemanager.recovery.NMLeveldbStateStoreService.storeContainer(ContainerId,
 int, long, StartContainerRequest) At NMLeveldbStateStoreService.java:[line 
464] 
       Nullcheck of it at line 96 of value previously dereferenced in 
org.apache.hadoop.yarn.server.nodemanager.security.NMContainerTokenSecretManager.recover()
 At NMContainerTokenSecretManager.java:96 of value previously dereferenced in 
org.apache.hadoop.yarn.server.nodemanager.security.NMContainerTokenSecretManager.recover()
 At NMContainerTokenSecretManager.java:[line 96] 
       Nullcheck of it at line 94 of value previously dereferenced in 
org.apache.hadoop.yarn.server.nodemanager.security.NMTokenSecretManagerInNM.recover()
 At NMTokenSecretManagerInNM.java:94 of value previously dereferenced in 
org.apache.hadoop.yarn.server.nodemanager.security.NMTokenSecretManagerInNM.recover()
 At NMTokenSecretManagerInNM.java:[line 94] 

    findbugs :

       
module:hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-applicationhistoryservice
 
       Nullcheck of entityIterator at line 176 of value previously dereferenced 
in 
org.apache.hadoop.yarn.server.timeline.KeyValueBasedTimelineStore.getEntities(String,
 Long, Long, Long, String, Long, NameValuePair, Collection, EnumSet, 
TimelineDataManager$CheckAcl) At KeyValueBasedTimelineStore.java:176 of value 
previously dereferenced in 
org.apache.hadoop.yarn.server.timeline.KeyValueBasedTimelineStore.getEntities(String,
 Long, Long, Long, String, Long, NameValuePair, Collection, EnumSet, 
TimelineDataManager$CheckAcl) At KeyValueBasedTimelineStore.java:[line 131] 
       Nullcheck of iterator at line 1503 of value previously dereferenced in 
org.apache.hadoop.yarn.server.timeline.RollingLevelDBTimelineStore.evictOldStartTimes(long)
 At RollingLevelDBTimelineStore.java:1503 of value previously dereferenced in 
org.apache.hadoop.yarn.server.timeline.RollingLevelDBTimelineStore.evictOldStartTimes(long)
 At RollingLevelDBTimelineStore.java:[line 1503] 
       Nullcheck of iterator at line 1733 of value previously dereferenced in 
org.apache.hadoop.yarn.server.timeline.RollingLevelDBTimelineStore.getDomain(String)
 At RollingLevelDBTimelineStore.java:1733 of value previously dereferenced in 
org.apache.hadoop.yarn.server.timeline.RollingLevelDBTimelineStore.getDomain(String)
 At RollingLevelDBTimelineStore.java:[line 1733] 
       Nullcheck of iterator at line 1742 of value previously dereferenced in 
org.apache.hadoop.yarn.server.timeline.RollingLevelDBTimelineStore.getDomains(String)
 At RollingLevelDBTimelineStore.java:1742 of value previously dereferenced in 
org.apache.hadoop.yarn.server.timeline.RollingLevelDBTimelineStore.getDomains(String)
 At RollingLevelDBTimelineStore.java:[line 1742] 
       Nullcheck of iterator at line 429 of value previously dereferenced in 
org.apache.hadoop.yarn.server.timeline.RollingLevelDBTimelineStore.getEntity(String,
 String, EnumSet) At RollingLevelDBTimelineStore.java:429 of value previously 
dereferenced in 
org.apache.hadoop.yarn.server.timeline.RollingLevelDBTimelineStore.getEntity(String,
 String, EnumSet) At RollingLevelDBTimelineStore.java:[line 429] 
       Nullcheck of iterator at line 737 of value previously dereferenced in 
org.apache.hadoop.yarn.server.timeline.RollingLevelDBTimelineStore.getEntityByTime(byte[],
 String, Long, Long, Long, String, Long, Collection, EnumSet, 
TimelineDataManager$CheckAcl, boolean) At RollingLevelDBTimelineStore.java:737 
of value previously dereferenced in 
org.apache.hadoop.yarn.server.timeline.RollingLevelDBTimelineStore.getEntityByTime(byte[],
 String, Long, Long, Long, String, Long, Collection, EnumSet, 
TimelineDataManager$CheckAcl, boolean) At 
RollingLevelDBTimelineStore.java:[line 737] 
       Nullcheck of iterator at line 607 of value previously dereferenced in 
org.apache.hadoop.yarn.server.timeline.RollingLevelDBTimelineStore.getEntityTimelines(String,
 SortedSet, Long, Long, Long, Set) At RollingLevelDBTimelineStore.java:607 of 
value previously dereferenced in 
org.apache.hadoop.yarn.server.timeline.RollingLevelDBTimelineStore.getEntityTimelines(String,
 SortedSet, Long, Long, Long, Set) At RollingLevelDBTimelineStore.java:[line 
607] 
       Nullcheck of domainWriteBatch at line 1645 of value previously 
dereferenced in 
org.apache.hadoop.yarn.server.timeline.RollingLevelDBTimelineStore.put(TimelineDomain)
 At RollingLevelDBTimelineStore.java:1645 of value previously dereferenced in 
org.apache.hadoop.yarn.server.timeline.RollingLevelDBTimelineStore.put(TimelineDomain)
 At RollingLevelDBTimelineStore.java:[line 1645] 
       Nullcheck of ownerWriteBatch at line 1646 of value previously 
dereferenced in 
org.apache.hadoop.yarn.server.timeline.RollingLevelDBTimelineStore.put(TimelineDomain)
 At RollingLevelDBTimelineStore.java:1646 of value previously dereferenced in 
org.apache.hadoop.yarn.server.timeline.RollingLevelDBTimelineStore.put(TimelineDomain)
 At RollingLevelDBTimelineStore.java:[line 1646] 
       Nullcheck of localFS at line 294 of value previously dereferenced in 
org.apache.hadoop.yarn.server.timeline.RollingLevelDBTimelineStore.serviceInit(Configuration)
 At RollingLevelDBTimelineStore.java:294 of value previously dereferenced in 
org.apache.hadoop.yarn.server.timeline.RollingLevelDBTimelineStore.serviceInit(Configuration)
 At RollingLevelDBTimelineStore.java:[line 294] 

    findbugs :

       
module:hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager
 
       Nullcheck of batch at line 596 of value previously dereferenced in 
org.apache.hadoop.yarn.server.resourcemanager.recovery.LeveldbRMStateStore.removeApplicationStateInternal(ApplicationStateData)
 At LeveldbRMStateStore.java:596 of value previously dereferenced in 
org.apache.hadoop.yarn.server.resourcemanager.recovery.LeveldbRMStateStore.removeApplicationStateInternal(ApplicationStateData)
 At LeveldbRMStateStore.java:[line 596] 
       Nullcheck of batch at line 637 of value previously dereferenced in 
org.apache.hadoop.yarn.server.resourcemanager.recovery.LeveldbRMStateStore.removeReservationState(String,
 String) At LeveldbRMStateStore.java:637 of value previously dereferenced in 
org.apache.hadoop.yarn.server.resourcemanager.recovery.LeveldbRMStateStore.removeReservationState(String,
 String) At LeveldbRMStateStore.java:[line 637] 
       Nullcheck of batch at line 655 of value previously dereferenced in 
org.apache.hadoop.yarn.server.resourcemanager.recovery.LeveldbRMStateStore.storeOrUpdateRMDT(RMDelegationTokenIdentifier,
 Long, boolean) At LeveldbRMStateStore.java:655 of value previously 
dereferenced in 
org.apache.hadoop.yarn.server.resourcemanager.recovery.LeveldbRMStateStore.storeOrUpdateRMDT(RMDelegationTokenIdentifier,
 Long, boolean) At LeveldbRMStateStore.java:[line 655] 
       Nullcheck of batch at line 746 of value previously dereferenced in 
org.apache.hadoop.yarn.server.resourcemanager.recovery.LeveldbRMStateStore.storeProxyCACertState(X509Certificate,
 PrivateKey) At LeveldbRMStateStore.java:746 of value previously dereferenced 
in 
org.apache.hadoop.yarn.server.resourcemanager.recovery.LeveldbRMStateStore.storeProxyCACertState(X509Certificate,
 PrivateKey) At LeveldbRMStateStore.java:[line 746] 
       Nullcheck of batch at line 622 of value previously dereferenced in 
org.apache.hadoop.yarn.server.resourcemanager.recovery.LeveldbRMStateStore.storeReservationState(YarnProtos$ReservationAllocationStateProto,
 String, String) At LeveldbRMStateStore.java:622 of value previously 
dereferenced in 
org.apache.hadoop.yarn.server.resourcemanager.recovery.LeveldbRMStateStore.storeReservationState(YarnProtos$ReservationAllocationStateProto,
 String, String) At LeveldbRMStateStore.java:[line 622] 
       Nullcheck of in at line 268 of value previously dereferenced in 
org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.conf.FSSchedulerConfigurationStore.getConfigVersion()
 At FSSchedulerConfigurationStore.java:268 of value previously dereferenced in 
org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.conf.FSSchedulerConfigurationStore.getConfigVersion()
 At FSSchedulerConfigurationStore.java:[line 268] 
       Nullcheck of out at line 258 of value previously dereferenced in 
org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.conf.FSSchedulerConfigurationStore.writeConfigVersion(long)
 At FSSchedulerConfigurationStore.java:258 of value previously dereferenced in 
org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.conf.FSSchedulerConfigurationStore.writeConfigVersion(long)
 At FSSchedulerConfigurationStore.java:[line 258] 

    findbugs :

       
module:hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-timelineservice-hbase
 
       Boxed value is unboxed and then immediately reboxed in 
org.apache.hadoop.yarn.server.timelineservice.storage.common.ColumnRWHelper.readResultsWithTimestamps(Result,
 byte[], byte[], KeyConverter, ValueConverter, boolean) At 
ColumnRWHelper.java:then immediately reboxed in 
org.apache.hadoop.yarn.server.timelineservice.storage.common.ColumnRWHelper.readResultsWithTimestamps(Result,
 byte[], byte[], KeyConverter, ValueConverter, boolean) At 
ColumnRWHelper.java:[line 333] 
       Nullcheck of fs at line 75 of value previously dereferenced in 
org.apache.hadoop.yarn.server.timelineservice.storage.common.HBaseTimelineStorageUtils.getTimelineServiceHBaseConf(Configuration)
 At HBaseTimelineStorageUtils.java:75 of value previously dereferenced in 
org.apache.hadoop.yarn.server.timelineservice.storage.common.HBaseTimelineStorageUtils.getTimelineServiceHBaseConf(Configuration)
 At HBaseTimelineStorageUtils.java:[line 75] 
       Nullcheck of results at line 95 of value previously dereferenced in 
org.apache.hadoop.yarn.server.timelineservice.storage.reader.EntityTypeReader.readEntityTypes(Configuration,
 Connection) At EntityTypeReader.java:95 of value previously dereferenced in 
org.apache.hadoop.yarn.server.timelineservice.storage.reader.EntityTypeReader.readEntityTypes(Configuration,
 Connection) At EntityTypeReader.java:[line 95] 

    findbugs :

       
module:hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-timelineservice-hbase/hadoop-yarn-server-timelineservice-hbase-client
 
       Boxed value is unboxed and then immediately reboxed in 
org.apache.hadoop.yarn.server.timelineservice.storage.common.ColumnRWHelper.readResultsWithTimestamps(Result,
 byte[], byte[], KeyConverter, ValueConverter, boolean) At 
ColumnRWHelper.java:then immediately reboxed in 
org.apache.hadoop.yarn.server.timelineservice.storage.common.ColumnRWHelper.readResultsWithTimestamps(Result,
 byte[], byte[], KeyConverter, ValueConverter, boolean) At 
ColumnRWHelper.java:[line 333] 
       Nullcheck of fs at line 75 of value previously dereferenced in 
org.apache.hadoop.yarn.server.timelineservice.storage.common.HBaseTimelineStorageUtils.getTimelineServiceHBaseConf(Configuration)
 At HBaseTimelineStorageUtils.java:75 of value previously dereferenced in 
org.apache.hadoop.yarn.server.timelineservice.storage.common.HBaseTimelineStorageUtils.getTimelineServiceHBaseConf(Configuration)
 At HBaseTimelineStorageUtils.java:[line 75] 
       Nullcheck of results at line 95 of value previously dereferenced in 
org.apache.hadoop.yarn.server.timelineservice.storage.reader.EntityTypeReader.readEntityTypes(Configuration,
 Connection) At EntityTypeReader.java:95 of value previously dereferenced in 
org.apache.hadoop.yarn.server.timelineservice.storage.reader.EntityTypeReader.readEntityTypes(Configuration,
 Connection) At EntityTypeReader.java:[line 95] 

    findbugs :

       module:hadoop-yarn-project/hadoop-yarn/hadoop-yarn-applications 
       Nullcheck of os at line 401 of value previously dereferenced in 
org.apache.hadoop.yarn.service.provider.ProviderUtils.resolvePropsInConfigFileAndSaveOnHdfs(SliderFileSystem,
 Map, ComponentInstance, ConfigFile, String, Path) At ProviderUtils.java:401 of 
value previously dereferenced in 
org.apache.hadoop.yarn.service.provider.ProviderUtils.resolvePropsInConfigFileAndSaveOnHdfs(SliderFileSystem,
 Map, ComponentInstance, ConfigFile, String, Path) At ProviderUtils.java:[line 
401] 
       Redundant nullcheck of resStream, which is known to be non-null in 
org.apache.hadoop.yarn.service.utils.JsonSerDeser.fromResource(String) 
Redundant null check at JsonSerDeser.java:is known to be non-null in 
org.apache.hadoop.yarn.service.utils.JsonSerDeser.fromResource(String) 
Redundant null check at JsonSerDeser.java:[line 123] 

    findbugs :

       
module:hadoop-yarn-project/hadoop-yarn/hadoop-yarn-applications/hadoop-yarn-services
 
       Nullcheck of os at line 401 of value previously dereferenced in 
org.apache.hadoop.yarn.service.provider.ProviderUtils.resolvePropsInConfigFileAndSaveOnHdfs(SliderFileSystem,
 Map, ComponentInstance, ConfigFile, String, Path) At ProviderUtils.java:401 of 
value previously dereferenced in 
org.apache.hadoop.yarn.service.provider.ProviderUtils.resolvePropsInConfigFileAndSaveOnHdfs(SliderFileSystem,
 Map, ComponentInstance, ConfigFile, String, Path) At ProviderUtils.java:[line 
401] 
       Redundant nullcheck of resStream, which is known to be non-null in 
org.apache.hadoop.yarn.service.utils.JsonSerDeser.fromResource(String) 
Redundant null check at JsonSerDeser.java:is known to be non-null in 
org.apache.hadoop.yarn.service.utils.JsonSerDeser.fromResource(String) 
Redundant null check at JsonSerDeser.java:[line 123] 

    findbugs :

       
module:hadoop-yarn-project/hadoop-yarn/hadoop-yarn-applications/hadoop-yarn-services/hadoop-yarn-services-core
 
       Nullcheck of os at line 401 of value previously dereferenced in 
org.apache.hadoop.yarn.service.provider.ProviderUtils.resolvePropsInConfigFileAndSaveOnHdfs(SliderFileSystem,
 Map, ComponentInstance, ConfigFile, String, Path) At ProviderUtils.java:401 of 
value previously dereferenced in 
org.apache.hadoop.yarn.service.provider.ProviderUtils.resolvePropsInConfigFileAndSaveOnHdfs(SliderFileSystem,
 Map, ComponentInstance, ConfigFile, String, Path) At ProviderUtils.java:[line 
401] 
       Redundant nullcheck of resStream, which is known to be non-null in 
org.apache.hadoop.yarn.service.utils.JsonSerDeser.fromResource(String) 
Redundant null check at JsonSerDeser.java:is known to be non-null in 
org.apache.hadoop.yarn.service.utils.JsonSerDeser.fromResource(String) 
Redundant null check at JsonSerDeser.java:[line 123] 

    findbugs :

       module:hadoop-yarn-project 
       Nullcheck of out at line 536 of value previously dereferenced in 
org.apache.hadoop.yarn.logaggregation.AggregatedLogFormat$LogWriter.append(AggregatedLogFormat$LogKey,
 AggregatedLogFormat$LogValue) At AggregatedLogFormat.java:536 of value 
previously dereferenced in 
org.apache.hadoop.yarn.logaggregation.AggregatedLogFormat$LogWriter.append(AggregatedLogFormat$LogKey,
 AggregatedLogFormat$LogValue) At AggregatedLogFormat.java:[line 536] 
       Nullcheck of out at line 519 of value previously dereferenced in 
org.apache.hadoop.yarn.logaggregation.AggregatedLogFormat$LogWriter.writeApplicationACLs(Map)
 At AggregatedLogFormat.java:519 of value previously dereferenced in 
org.apache.hadoop.yarn.logaggregation.AggregatedLogFormat$LogWriter.writeApplicationACLs(Map)
 At AggregatedLogFormat.java:[line 519] 
       Nullcheck of out at line 509 of value previously dereferenced in 
org.apache.hadoop.yarn.logaggregation.AggregatedLogFormat$LogWriter.writeApplicationOwner(String)
 At AggregatedLogFormat.java:509 of value previously dereferenced in 
org.apache.hadoop.yarn.logaggregation.AggregatedLogFormat$LogWriter.writeApplicationOwner(String)
 At AggregatedLogFormat.java:[line 509] 
       Nullcheck of out at line 512 of value previously dereferenced in 
org.apache.hadoop.yarn.logaggregation.AggregatedLogFormat$LogWriter.writeApplicationOwner(String)
 At AggregatedLogFormat.java:512 of value previously dereferenced in 
org.apache.hadoop.yarn.logaggregation.AggregatedLogFormat$LogWriter.writeApplicationOwner(String)
 At AggregatedLogFormat.java:[line 512] 
       Nullcheck of out at line 500 of value previously dereferenced in 
org.apache.hadoop.yarn.logaggregation.AggregatedLogFormat$LogWriter.writeVersion()
 At AggregatedLogFormat.java:500 of value previously dereferenced in 
org.apache.hadoop.yarn.logaggregation.AggregatedLogFormat$LogWriter.writeVersion()
 At AggregatedLogFormat.java:[line 500] 
       Nullcheck of out at line 503 of value previously dereferenced in 
org.apache.hadoop.yarn.logaggregation.AggregatedLogFormat$LogWriter.writeVersion()
 At AggregatedLogFormat.java:503 of value previously dereferenced in 
org.apache.hadoop.yarn.logaggregation.AggregatedLogFormat$LogWriter.writeVersion()
 At AggregatedLogFormat.java:[line 503] 
       Nullcheck of out at line 439 of value previously dereferenced in 
org.apache.hadoop.yarn.server.nodemanager.DefaultContainerExecutor$LocalWrapperScriptBuilder.writeLocalWrapperScript(Path,
 Path) At DefaultContainerExecutor.java:439 of value previously dereferenced in 
org.apache.hadoop.yarn.server.nodemanager.DefaultContainerExecutor$LocalWrapperScriptBuilder.writeLocalWrapperScript(Path,
 Path) At DefaultContainerExecutor.java:[line 439] 
       Nullcheck of out at line 510 of value previously dereferenced in 
org.apache.hadoop.yarn.server.nodemanager.DefaultContainerExecutor$UnixLocalWrapperScriptBuilder.writeSessionScript(Path,
 Path) At DefaultContainerExecutor.java:510 of value previously dereferenced in 
org.apache.hadoop.yarn.server.nodemanager.DefaultContainerExecutor$UnixLocalWrapperScriptBuilder.writeSessionScript(Path,
 Path) At DefaultContainerExecutor.java:[line 510] 
       Nullcheck of it at line 103 of value previously dereferenced in 
org.apache.hadoop.yarn.server.nodemanager.DeletionService.recover(NMStateStoreService$RecoveredDeletionServiceState)
 At DeletionService.java:103 of value previously dereferenced in 
org.apache.hadoop.yarn.server.nodemanager.DeletionService.recover(NMStateStoreService$RecoveredDeletionServiceState)
 At DeletionService.java:[line 103] 
       Nullcheck of rasIterator at line 371 of value previously dereferenced in 
org.apache.hadoop.yarn.server.nodemanager.containermanager.ContainerManagerImpl.recover()
 At ContainerManagerImpl.java:371 of value previously dereferenced in 
org.apache.hadoop.yarn.server.nodemanager.containermanager.ContainerManagerImpl.recover()
 At ContainerManagerImpl.java:[line 371] 
       Nullcheck of rcsIterator at line 380 of value previously dereferenced in 
org.apache.hadoop.yarn.server.nodemanager.containermanager.ContainerManagerImpl.recover()
 At ContainerManagerImpl.java:380 of value previously dereferenced in 
org.apache.hadoop.yarn.server.nodemanager.containermanager.ContainerManagerImpl.recover()
 At ContainerManagerImpl.java:[line 380] 
       Nullcheck of containerScriptOutStream at line 341 of value previously 
dereferenced in 
org.apache.hadoop.yarn.server.nodemanager.containermanager.launcher.ContainerLaunch.call()
 At ContainerLaunch.java:341 of value previously dereferenced in 
org.apache.hadoop.yarn.server.nodemanager.containermanager.launcher.ContainerLaunch.call()
 At ContainerLaunch.java:[line 341] 
       Nullcheck of keystoreOutStream at line 291 of value previously 
dereferenced in 
org.apache.hadoop.yarn.server.nodemanager.containermanager.launcher.ContainerLaunch.call()
 At ContainerLaunch.java:291 of value previously dereferenced in 
org.apache.hadoop.yarn.server.nodemanager.containermanager.launcher.ContainerLaunch.call()
 At ContainerLaunch.java:[line 291] 
       Nullcheck of truststoreOutStream at line 309 of value previously 
dereferenced in 
org.apache.hadoop.yarn.server.nodemanager.containermanager.launcher.ContainerLaunch.call()
 At ContainerLaunch.java:309 of value previously dereferenced in 
org.apache.hadoop.yarn.server.nodemanager.containermanager.launcher.ContainerLaunch.call()
 At ContainerLaunch.java:[line 309] 
       Nullcheck of stream at line 182 of value previously dereferenced in 
org.apache.hadoop.yarn.server.nodemanager.containermanager.linux.runtime.JavaSandboxLinuxContainerRuntime.initializePolicyDir()
 At JavaSandboxLinuxContainerRuntime.java:182 of value previously dereferenced 
in 
org.apache.hadoop.yarn.server.nodemanager.containermanager.linux.runtime.JavaSandboxLinuxContainerRuntime.initializePolicyDir()
 At JavaSandboxLinuxContainerRuntime.java:[line 182] 
       Redundant nullcheck of it, which is known to be non-null in 
org.apache.hadoop.yarn.server.nodemanager.containermanager.localizer.ResourceLocalizationService.recoverTrackerResources(LocalResourcesTracker,
 NMStateStoreService$LocalResourceTrackerState) Redundant null check at 
ResourceLocalizationService.java:is known to be non-null in 
org.apache.hadoop.yarn.server.nodemanager.containermanager.localizer.ResourceLocalizationService.recoverTrackerResources(LocalResourcesTracker,
 NMStateStoreService$LocalResourceTrackerState) Redundant null check at 
ResourceLocalizationService.java:[line 343] 
       Redundant nullcheck of it, which is known to be non-null in 
org.apache.hadoop.yarn.server.nodemanager.containermanager.localizer.ResourceLocalizationService.recoverTrackerResources(LocalResourcesTracker,
 NMStateStoreService$LocalResourceTrackerState) Redundant null check at 
ResourceLocalizationService.java:is known to be non-null in 
org.apache.hadoop.yarn.server.nodemanager.containermanager.localizer.ResourceLocalizationService.recoverTrackerResources(LocalResourcesTracker,
 NMStateStoreService$LocalResourceTrackerState) Redundant null check at 
ResourceLocalizationService.java:[line 356] 
       Nullcheck of it at line 307 of value previously dereferenced in 
org.apache.hadoop.yarn.server.nodemanager.containermanager.localizer.ResourceLocalizationService.recoverLocalizedResources(NMStateStoreService$RecoveredLocalizationState)
 At ResourceLocalizationService.java:307 of value previously dereferenced in 
org.apache.hadoop.yarn.server.nodemanager.containermanager.localizer.ResourceLocalizationService.recoverLocalizedResources(NMStateStoreService$RecoveredLocalizationState)
 At ResourceLocalizationService.java:[line 307] 
       Nullcheck of batch at line 1433 of value previously dereferenced in 
org.apache.hadoop.yarn.server.nodemanager.recovery.NMLeveldbStateStoreService.storeAssignedResources(Container,
 String, List) At NMLeveldbStateStoreService.java:1433 of value previously 
dereferenced in 
org.apache.hadoop.yarn.server.nodemanager.recovery.NMLeveldbStateStoreService.storeAssignedResources(Container,
 String, List) At NMLeveldbStateStoreService.java:[line 1433] 
       Nullcheck of batch at line 464 of value previously dereferenced in 
org.apache.hadoop.yarn.server.nodemanager.recovery.NMLeveldbStateStoreService.storeContainer(ContainerId,
 int, long, StartContainerRequest) At NMLeveldbStateStoreService.java:464 of 
value previously dereferenced in 
org.apache.hadoop.yarn.server.nodemanager.recovery.NMLeveldbStateStoreService.storeContainer(ContainerId,
 int, long, StartContainerRequest) At NMLeveldbStateStoreService.java:[line 
464] 
       Nullcheck of it at line 96 of value previously dereferenced in 
org.apache.hadoop.yarn.server.nodemanager.security.NMContainerTokenSecretManager.recover()
 At NMContainerTokenSecretManager.java:96 of value previously dereferenced in 
org.apache.hadoop.yarn.server.nodemanager.security.NMContainerTokenSecretManager.recover()
 At NMContainerTokenSecretManager.java:[line 96] 
       Nullcheck of it at line 94 of value previously dereferenced in 
org.apache.hadoop.yarn.server.nodemanager.security.NMTokenSecretManagerInNM.recover()
 At NMTokenSecretManagerInNM.java:94 of value previously dereferenced in 
org.apache.hadoop.yarn.server.nodemanager.security.NMTokenSecretManagerInNM.recover()
 At NMTokenSecretManagerInNM.java:[line 94] 
       Nullcheck of batch at line 596 of value previously dereferenced in 
org.apache.hadoop.yarn.server.resourcemanager.recovery.LeveldbRMStateStore.removeApplicationStateInternal(ApplicationStateData)
 At LeveldbRMStateStore.java:596 of value previously dereferenced in 
org.apache.hadoop.yarn.server.resourcemanager.recovery.LeveldbRMStateStore.removeApplicationStateInternal(ApplicationStateData)
 At LeveldbRMStateStore.java:[line 596] 
       Nullcheck of batch at line 637 of value previously dereferenced in 
org.apache.hadoop.yarn.server.resourcemanager.recovery.LeveldbRMStateStore.removeReservationState(String,
 String) At LeveldbRMStateStore.java:637 of value previously dereferenced in 
org.apache.hadoop.yarn.server.resourcemanager.recovery.LeveldbRMStateStore.removeReservationState(String,
 String) At LeveldbRMStateStore.java:[line 637] 
       Nullcheck of batch at line 655 of value previously dereferenced in 
org.apache.hadoop.yarn.server.resourcemanager.recovery.LeveldbRMStateStore.storeOrUpdateRMDT(RMDelegationTokenIdentifier,
 Long, boolean) At LeveldbRMStateStore.java:655 of value previously 
dereferenced in 
org.apache.hadoop.yarn.server.resourcemanager.recovery.LeveldbRMStateStore.storeOrUpdateRMDT(RMDelegationTokenIdentifier,
 Long, boolean) At LeveldbRMStateStore.java:[line 655] 
       Nullcheck of batch at line 746 of value previously dereferenced in 
org.apache.hadoop.yarn.server.resourcemanager.recovery.LeveldbRMStateStore.storeProxyCACertState(X509Certificate,
 PrivateKey) At LeveldbRMStateStore.java:746 of value previously dereferenced 
in 
org.apache.hadoop.yarn.server.resourcemanager.recovery.LeveldbRMStateStore.storeProxyCACertState(X509Certificate,
 PrivateKey) At LeveldbRMStateStore.java:[line 746] 
       Nullcheck of batch at line 622 of value previously dereferenced in 
org.apache.hadoop.yarn.server.resourcemanager.recovery.LeveldbRMStateStore.storeReservationState(YarnProtos$ReservationAllocationStateProto,
 String, String) At LeveldbRMStateStore.java:622 of value previously 
dereferenced in 
org.apache.hadoop.yarn.server.resourcemanager.recovery.LeveldbRMStateStore.storeReservationState(YarnProtos$ReservationAllocationStateProto,
 String, String) At LeveldbRMStateStore.java:[line 622] 
       Nullcheck of in at line 268 of value previously dereferenced in 
org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.conf.FSSchedulerConfigurationStore.getConfigVersion()
 At FSSchedulerConfigurationStore.java:268 of value previously dereferenced in 
org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.conf.FSSchedulerConfigurationStore.getConfigVersion()
 At FSSchedulerConfigurationStore.java:[line 268] 
       Nullcheck of out at line 258 of value previously dereferenced in 
org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.conf.FSSchedulerConfigurationStore.writeConfigVersion(long)
 At FSSchedulerConfigurationStore.java:258 of value previously dereferenced in 
org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.conf.FSSchedulerConfigurationStore.writeConfigVersion(long)
 At FSSchedulerConfigurationStore.java:[line 258] 
       Nullcheck of entityIterator at line 176 of value previously dereferenced 
in 
org.apache.hadoop.yarn.server.timeline.KeyValueBasedTimelineStore.getEntities(String,
 Long, Long, Long, String, Long, NameValuePair, Collection, EnumSet, 
TimelineDataManager$CheckAcl) At KeyValueBasedTimelineStore.java:176 of value 
previously dereferenced in 
org.apache.hadoop.yarn.server.timeline.KeyValueBasedTimelineStore.getEntities(String,
 Long, Long, Long, String, Long, NameValuePair, Collection, EnumSet, 
TimelineDataManager$CheckAcl) At KeyValueBasedTimelineStore.java:[line 131] 
       Nullcheck of iterator at line 1503 of value previously dereferenced in 
org.apache.hadoop.yarn.server.timeline.RollingLevelDBTimelineStore.evictOldStartTimes(long)
 At RollingLevelDBTimelineStore.java:1503 of value previously dereferenced in 
org.apache.hadoop.yarn.server.timeline.RollingLevelDBTimelineStore.evictOldStartTimes(long)
 At RollingLevelDBTimelineStore.java:[line 1503] 
       Nullcheck of iterator at line 1733 of value previously dereferenced in 
org.apache.hadoop.yarn.server.timeline.RollingLevelDBTimelineStore.getDomain(String)
 At RollingLevelDBTimelineStore.java:1733 of value previously dereferenced in 
org.apache.hadoop.yarn.server.timeline.RollingLevelDBTimelineStore.getDomain(String)
 At RollingLevelDBTimelineStore.java:[line 1733] 
       Nullcheck of iterator at line 1742 of value previously dereferenced in 
org.apache.hadoop.yarn.server.timeline.RollingLevelDBTimelineStore.getDomains(String)
 At RollingLevelDBTimelineStore.java:1742 of value previously dereferenced in 
org.apache.hadoop.yarn.server.timeline.RollingLevelDBTimelineStore.getDomains(String)
 At RollingLevelDBTimelineStore.java:[line 1742] 
       Nullcheck of iterator at line 429 of value previously dereferenced in 
org.apache.hadoop.yarn.server.timeline.RollingLevelDBTimelineStore.getEntity(String,
 String, EnumSet) At RollingLevelDBTimelineStore.java:429 of value previously 
dereferenced in 
org.apache.hadoop.yarn.server.timeline.RollingLevelDBTimelineStore.getEntity(String,
 String, EnumSet) At RollingLevelDBTimelineStore.java:[line 429] 
       Nullcheck of iterator at line 737 of value previously dereferenced in 
org.apache.hadoop.yarn.server.timeline.RollingLevelDBTimelineStore.getEntityByTime(byte[],
 String, Long, Long, Long, String, Long, Collection, EnumSet, 
TimelineDataManager$CheckAcl, boolean) At RollingLevelDBTimelineStore.java:737 
of value previously dereferenced in 
org.apache.hadoop.yarn.server.timeline.RollingLevelDBTimelineStore.getEntityByTime(byte[],
 String, Long, Long, Long, String, Long, Collection, EnumSet, 
TimelineDataManager$CheckAcl, boolean) At 
RollingLevelDBTimelineStore.java:[line 737] 
       Nullcheck of iterator at line 607 of value previously dereferenced in 
org.apache.hadoop.yarn.server.timeline.RollingLevelDBTimelineStore.getEntityTimelines(String,
 SortedSet, Long, Long, Long, Set) At RollingLevelDBTimelineStore.java:607 of 
value previously dereferenced in 
org.apache.hadoop.yarn.server.timeline.RollingLevelDBTimelineStore.getEntityTimelines(String,
 SortedSet, Long, Long, Long, Set) At RollingLevelDBTimelineStore.java:[line 
607] 
       Nullcheck of domainWriteBatch at line 1645 of value previously 
dereferenced in 
org.apache.hadoop.yarn.server.timeline.RollingLevelDBTimelineStore.put(TimelineDomain)
 At RollingLevelDBTimelineStore.java:1645 of value previously dereferenced in 
org.apache.hadoop.yarn.server.timeline.RollingLevelDBTimelineStore.put(TimelineDomain)
 At RollingLevelDBTimelineStore.java:[line 1645] 
       Nullcheck of ownerWriteBatch at line 1646 of value previously 
dereferenced in 
org.apache.hadoop.yarn.server.timeline.RollingLevelDBTimelineStore.put(TimelineDomain)
 At RollingLevelDBTimelineStore.java:1646 of value previously dereferenced in 
org.apache.hadoop.yarn.server.timeline.RollingLevelDBTimelineStore.put(TimelineDomain)
 At RollingLevelDBTimelineStore.java:[line 1646] 
       Nullcheck of localFS at line 294 of value previously dereferenced in 
org.apache.hadoop.yarn.server.timeline.RollingLevelDBTimelineStore.serviceInit(Configuration)
 At RollingLevelDBTimelineStore.java:294 of value previously dereferenced in 
org.apache.hadoop.yarn.server.timeline.RollingLevelDBTimelineStore.serviceInit(Configuration)
 At RollingLevelDBTimelineStore.java:[line 294] 
       Boxed value is unboxed and then immediately reboxed in 
org.apache.hadoop.yarn.server.timelineservice.storage.common.ColumnRWHelper.readResultsWithTimestamps(Result,
 byte[], byte[], KeyConverter, ValueConverter, boolean) At 
ColumnRWHelper.java:then immediately reboxed in 
org.apache.hadoop.yarn.server.timelineservice.storage.common.ColumnRWHelper.readResultsWithTimestamps(Result,
 byte[], byte[], KeyConverter, ValueConverter, boolean) At 
ColumnRWHelper.java:[line 333] 
       Nullcheck of fs at line 75 of value previously dereferenced in 
org.apache.hadoop.yarn.server.timelineservice.storage.common.HBaseTimelineStorageUtils.getTimelineServiceHBaseConf(Configuration)
 At HBaseTimelineStorageUtils.java:75 of value previously dereferenced in 
org.apache.hadoop.yarn.server.timelineservice.storage.common.HBaseTimelineStorageUtils.getTimelineServiceHBaseConf(Configuration)
 At HBaseTimelineStorageUtils.java:[line 75] 
       Nullcheck of results at line 95 of value previously dereferenced in 
org.apache.hadoop.yarn.server.timelineservice.storage.reader.EntityTypeReader.readEntityTypes(Configuration,
 Connection) At EntityTypeReader.java:95 of value previously dereferenced in 
org.apache.hadoop.yarn.server.timelineservice.storage.reader.EntityTypeReader.readEntityTypes(Configuration,
 Connection) At EntityTypeReader.java:[line 95] 
       Nullcheck of os at line 401 of value previously dereferenced in 
org.apache.hadoop.yarn.service.provider.ProviderUtils.resolvePropsInConfigFileAndSaveOnHdfs(SliderFileSystem,
 Map, ComponentInstance, ConfigFile, String, Path) At ProviderUtils.java:401 of 
value previously dereferenced in 
org.apache.hadoop.yarn.service.provider.ProviderUtils.resolvePropsInConfigFileAndSaveOnHdfs(SliderFileSystem,
 Map, ComponentInstance, ConfigFile, String, Path) At ProviderUtils.java:[line 
401] 
       Redundant nullcheck of resStream, which is known to be non-null in 
org.apache.hadoop.yarn.service.utils.JsonSerDeser.fromResource(String) 
Redundant null check at JsonSerDeser.java:is known to be non-null in 
org.apache.hadoop.yarn.service.utils.JsonSerDeser.fromResource(String) 
Redundant null check at JsonSerDeser.java:[line 123] 

    findbugs :

       module:hadoop-tools/hadoop-dynamometer/hadoop-dynamometer-infra 
       Nullcheck of fsdis at line 152 of value previously dereferenced in 
org.apache.hadoop.tools.dynamometer.SimulatedDataNodes.run(String[]) At 
SimulatedDataNodes.java:152 of value previously dereferenced in 
org.apache.hadoop.tools.dynamometer.SimulatedDataNodes.run(String[]) At 
SimulatedDataNodes.java:[line 152] 

    findbugs :

       module:hadoop-tools/hadoop-dynamometer 
       Nullcheck of fsdis at line 152 of value previously dereferenced in 
org.apache.hadoop.tools.dynamometer.SimulatedDataNodes.run(String[]) At 
SimulatedDataNodes.java:152 of value previously dereferenced in 
org.apache.hadoop.tools.dynamometer.SimulatedDataNodes.run(String[]) At 
SimulatedDataNodes.java:[line 152] 

    findbugs :

       module:hadoop-tools/hadoop-openstack 
       Load of known null value in 
org.apache.hadoop.fs.swift.util.HttpResponseUtils.getResponseBody(HttpResponse) 
At HttpResponseUtils.java:in 
org.apache.hadoop.fs.swift.util.HttpResponseUtils.getResponseBody(HttpResponse) 
At HttpResponseUtils.java:[line 70] 
       Redundant nullcheck of instream, which is known to be non-null in 
org.apache.hadoop.fs.swift.util.HttpResponseUtils.getResponseBody(HttpResponse) 
Redundant null check at HttpResponseUtils.java:is known to be non-null in 
org.apache.hadoop.fs.swift.util.HttpResponseUtils.getResponseBody(HttpResponse) 
Redundant null check at HttpResponseUtils.java:[line 52] 
       Redundant nullcheck of instream which is known to be null in 
org.apache.hadoop.fs.swift.util.HttpResponseUtils.getResponseBody(HttpResponse) 
Redundant null check at HttpResponseUtils.java:is known to be null in 
org.apache.hadoop.fs.swift.util.HttpResponseUtils.getResponseBody(HttpResponse) 
Redundant null check at HttpResponseUtils.java:[line 70] 

    findbugs :

       module:hadoop-tools/hadoop-aws 
       Nullcheck of s3AFileSystem at line 304 of value previously dereferenced 
in org.apache.hadoop.fs.s3a.s3guard.S3GuardTool.checkIfS3BucketIsGuarded(List) 
At S3GuardTool.java:304 of value previously dereferenced in 
org.apache.hadoop.fs.s3a.s3guard.S3GuardTool.checkIfS3BucketIsGuarded(List) At 
S3GuardTool.java:[line 304] 

    findbugs :

       module:hadoop-tools/hadoop-azure 
       Load of known null value in 
org.apache.hadoop.fs.azurebfs.services.AbfsHttpOperation.processStorageErrorResponse()
 At AbfsHttpOperation.java:in 
org.apache.hadoop.fs.azurebfs.services.AbfsHttpOperation.processStorageErrorResponse()
 At AbfsHttpOperation.java:[line 469] 
       Redundant nullcheck of stream, which is known to be non-null in 
org.apache.hadoop.fs.azurebfs.services.AbfsHttpOperation.processStorageErrorResponse()
 Redundant null check at AbfsHttpOperation.java:is known to be non-null in 
org.apache.hadoop.fs.azurebfs.services.AbfsHttpOperation.processStorageErrorResponse()
 Redundant null check at AbfsHttpOperation.java:[line 436] 
       Redundant nullcheck of stream which is known to be null in 
org.apache.hadoop.fs.azurebfs.services.AbfsHttpOperation.processStorageErrorResponse()
 Redundant null check at AbfsHttpOperation.java:is known to be null in 
org.apache.hadoop.fs.azurebfs.services.AbfsHttpOperation.processStorageErrorResponse()
 Redundant null check at AbfsHttpOperation.java:[line 469] 
       Nullcheck of jp at line 443 of value previously dereferenced in 
org.apache.hadoop.fs.azurebfs.services.AbfsHttpOperation.processStorageErrorResponse()
 At AbfsHttpOperation.java:443 of value previously dereferenced in 
org.apache.hadoop.fs.azurebfs.services.AbfsHttpOperation.processStorageErrorResponse()
 At AbfsHttpOperation.java:[line 443] 

    findbugs :

       module:hadoop-tools/hadoop-fs2img 
       Nullcheck of out at line 328 of value previously dereferenced in 
org.apache.hadoop.hdfs.server.namenode.ImageWriter.writeMD5(String) At 
ImageWriter.java:328 of value previously dereferenced in 
org.apache.hadoop.hdfs.server.namenode.ImageWriter.writeMD5(String) At 
ImageWriter.java:[line 328] 

    findbugs :

       module:hadoop-tools 
       Load of known null value in 
org.apache.hadoop.fs.azurebfs.services.AbfsHttpOperation.processStorageErrorResponse()
 At AbfsHttpOperation.java:in 
org.apache.hadoop.fs.azurebfs.services.AbfsHttpOperation.processStorageErrorResponse()
 At AbfsHttpOperation.java:[line 469] 
       Redundant nullcheck of stream, which is known to be non-null in 
org.apache.hadoop.fs.azurebfs.services.AbfsHttpOperation.processStorageErrorResponse()
 Redundant null check at AbfsHttpOperation.java:is known to be non-null in 
org.apache.hadoop.fs.azurebfs.services.AbfsHttpOperation.processStorageErrorResponse()
 Redundant null check at AbfsHttpOperation.java:[line 436] 
       Redundant nullcheck of stream which is known to be null in 
org.apache.hadoop.fs.azurebfs.services.AbfsHttpOperation.processStorageErrorResponse()
 Redundant null check at AbfsHttpOperation.java:is known to be null in 
org.apache.hadoop.fs.azurebfs.services.AbfsHttpOperation.processStorageErrorResponse()
 Redundant null check at AbfsHttpOperation.java:[line 469] 
       Nullcheck of jp at line 443 of value previously dereferenced in 
org.apache.hadoop.fs.azurebfs.services.AbfsHttpOperation.processStorageErrorResponse()
 At AbfsHttpOperation.java:443 of value previously dereferenced in 
org.apache.hadoop.fs.azurebfs.services.AbfsHttpOperation.processStorageErrorResponse()
 At AbfsHttpOperation.java:[line 443] 
       Nullcheck of s3AFileSystem at line 304 of value previously dereferenced 
in org.apache.hadoop.fs.s3a.s3guard.S3GuardTool.checkIfS3BucketIsGuarded(List) 
At S3GuardTool.java:304 of value previously dereferenced in 
org.apache.hadoop.fs.s3a.s3guard.S3GuardTool.checkIfS3BucketIsGuarded(List) At 
S3GuardTool.java:[line 304] 
       Load of known null value in 
org.apache.hadoop.fs.swift.util.HttpResponseUtils.getResponseBody(HttpResponse) 
At HttpResponseUtils.java:in 
org.apache.hadoop.fs.swift.util.HttpResponseUtils.getResponseBody(HttpResponse) 
At HttpResponseUtils.java:[line 70] 
       Redundant nullcheck of instream, which is known to be non-null in 
org.apache.hadoop.fs.swift.util.HttpResponseUtils.getResponseBody(HttpResponse) 
Redundant null check at HttpResponseUtils.java:is known to be non-null in 
org.apache.hadoop.fs.swift.util.HttpResponseUtils.getResponseBody(HttpResponse) 
Redundant null check at HttpResponseUtils.java:[line 52] 
       Redundant nullcheck of instream which is known to be null in 
org.apache.hadoop.fs.swift.util.HttpResponseUtils.getResponseBody(HttpResponse) 
Redundant null check at HttpResponseUtils.java:is known to be null in 
org.apache.hadoop.fs.swift.util.HttpResponseUtils.getResponseBody(HttpResponse) 
Redundant null check at HttpResponseUtils.java:[line 70] 
       Nullcheck of out at line 328 of value previously dereferenced in 
org.apache.hadoop.hdfs.server.namenode.ImageWriter.writeMD5(String) At 
ImageWriter.java:328 of value previously dereferenced in 
org.apache.hadoop.hdfs.server.namenode.ImageWriter.writeMD5(String) At 
ImageWriter.java:[line 328] 
       Nullcheck of fsdis at line 152 of value previously dereferenced in 
org.apache.hadoop.tools.dynamometer.SimulatedDataNodes.run(String[]) At 
SimulatedDataNodes.java:152 of value previously dereferenced in 
org.apache.hadoop.tools.dynamometer.SimulatedDataNodes.run(String[]) At 
SimulatedDataNodes.java:[line 152] 

    findbugs :

       module:root 
       Nullcheck of cc at line 457 of value previously dereferenced in 
org.apache.hadoop.crypto.key.KeyProviderCryptoExtension$DefaultCryptoExtension.decryptEncryptedKey(KeyProviderCryptoExtension$EncryptedKeyVersion)
 At KeyProviderCryptoExtension.java:457 of value previously dereferenced in 
org.apache.hadoop.crypto.key.KeyProviderCryptoExtension$DefaultCryptoExtension.decryptEncryptedKey(KeyProviderCryptoExtension$EncryptedKeyVersion)
 At KeyProviderCryptoExtension.java:[line 457] 
       Nullcheck of cc at line 368 of value previously dereferenced in 
org.apache.hadoop.crypto.key.KeyProviderCryptoExtension$DefaultCryptoExtension.reencryptEncryptedKeys(List)
 At KeyProviderCryptoExtension.java:368 of value previously dereferenced in 
org.apache.hadoop.crypto.key.KeyProviderCryptoExtension$DefaultCryptoExtension.reencryptEncryptedKeys(List)
 At KeyProviderCryptoExtension.java:[line 368] 
       Nullcheck of scope at line 3457 of value previously dereferenced in 
org.apache.hadoop.fs.FileSystem.createFileSystem(URI, Configuration) At 
FileSystem.java:3457 of value previously dereferenced in 
org.apache.hadoop.fs.FileSystem.createFileSystem(URI, Configuration) At 
FileSystem.java:[line 3457] 
       Nullcheck of out at line 1834 of value previously dereferenced in 
org.apache.hadoop.fs.FileUtil.write(FileContext, Path, CharSequence, Charset) 
At FileUtil.java:1834 of value previously dereferenced in 
org.apache.hadoop.fs.FileUtil.write(FileContext, Path, CharSequence, Charset) 
At FileUtil.java:[line 1834] 
       Nullcheck of out at line 1769 of value previously dereferenced in 
org.apache.hadoop.fs.FileUtil.write(FileContext, Path, Iterable, Charset) At 
FileUtil.java:1769 of value previously dereferenced in 
org.apache.hadoop.fs.FileUtil.write(FileContext, Path, Iterable, Charset) At 
FileUtil.java:[line 1769] 
       Nullcheck of out at line 1697 of value previously dereferenced in 
org.apache.hadoop.fs.FileUtil.write(FileContext, Path, byte[]) At 
FileUtil.java:1697 of value previously dereferenced in 
org.apache.hadoop.fs.FileUtil.write(FileContext, Path, byte[]) At 
FileUtil.java:[line 1697] 
       Nullcheck of out at line 1803 of value previously dereferenced in 
org.apache.hadoop.fs.FileUtil.write(FileSystem, Path, CharSequence, Charset) At 
FileUtil.java:1803 of value previously dereferenced in 
org.apache.hadoop.fs.FileUtil.write(FileSystem, Path, CharSequence, Charset) At 
FileUtil.java:[line 1803] 
       Nullcheck of out at line 1731 of value previously dereferenced in 
org.apache.hadoop.fs.FileUtil.write(FileSystem, Path, Iterable, Charset) At 
FileUtil.java:1731 of value previously dereferenced in 
org.apache.hadoop.fs.FileUtil.write(FileSystem, Path, Iterable, Charset) At 
FileUtil.java:[line 1731] 
       Nullcheck of out at line 1669 of value previously dereferenced in 
org.apache.hadoop.fs.FileUtil.write(FileSystem, Path, byte[]) At 
FileUtil.java:1669 of value previously dereferenced in 
org.apache.hadoop.fs.FileUtil.write(FileSystem, Path, byte[]) At 
FileUtil.java:[line 1669] 
       Nullcheck of in at line 376 of value previously dereferenced in 
org.apache.hadoop.fs.RawLocalFileSystem.concat(Path, Path[]) At 
RawLocalFileSystem.java:376 of value previously dereferenced in 
org.apache.hadoop.fs.RawLocalFileSystem.concat(Path, Path[]) At 
RawLocalFileSystem.java:[line 376] 
       Load of known null value in 
org.apache.hadoop.fs.azurebfs.services.AbfsHttpOperation.processStorageErrorResponse()
 At AbfsHttpOperation.java:in 
org.apache.hadoop.fs.azurebfs.services.AbfsHttpOperation.processStorageErrorResponse()
 At AbfsHttpOperation.java:[line 469] 
       Redundant nullcheck of stream, which is known to be non-null in 
org.apache.hadoop.fs.azurebfs.services.AbfsHttpOperation.processStorageErrorResponse()
 Redundant null check at AbfsHttpOperation.java:is known to be non-null in 
org.apache.hadoop.fs.azurebfs.services.AbfsHttpOperation.processStorageErrorResponse()
 Redundant null check at AbfsHttpOperation.java:[line 436] 
       Redundant nullcheck of stream which is known to be null in 
org.apache.hadoop.fs.azurebfs.services.AbfsHttpOperation.processStorageErrorResponse()
 Redundant null check at AbfsHttpOperation.java:is known to be null in 
org.apache.hadoop.fs.azurebfs.services.AbfsHttpOperation.processStorageErrorResponse()
 Redundant null check at AbfsHttpOperation.java:[line 469] 
       Nullcheck of jp at line 443 of value previously dereferenced in 
org.apache.hadoop.fs.azurebfs.services.AbfsHttpOperation.processStorageErrorResponse()
 At AbfsHttpOperation.java:443 of value previously dereferenced in 
org.apache.hadoop.fs.azurebfs.services.AbfsHttpOperation.processStorageErrorResponse()
 At AbfsHttpOperation.java:[line 443] 
       Nullcheck of s3AFileSystem at line 304 of value previously dereferenced 
in org.apache.hadoop.fs.s3a.s3guard.S3GuardTool.checkIfS3BucketIsGuarded(List) 
At S3GuardTool.java:304 of value previously dereferenced in 
org.apache.hadoop.fs.s3a.s3guard.S3GuardTool.checkIfS3BucketIsGuarded(List) At 
S3GuardTool.java:[line 304] 
       Nullcheck of in at line 106 of value previously dereferenced in 
org.apache.hadoop.fs.shell.CopyCommands$Merge.processArguments(LinkedList) At 
CopyCommands.java:106 of value previously dereferenced in 
org.apache.hadoop.fs.shell.CopyCommands$Merge.processArguments(LinkedList) At 
CopyCommands.java:[line 106] 
       Load of known null value in 
org.apache.hadoop.fs.swift.util.HttpResponseUtils.getResponseBody(HttpResponse) 
At HttpResponseUtils.java:in 
org.apache.hadoop.fs.swift.util.HttpResponseUtils.getResponseBody(HttpResponse) 
At HttpResponseUtils.java:[line 70] 
       Redundant nullcheck of instream, which is known to be non-null in 
org.apache.hadoop.fs.swift.util.HttpResponseUtils.getResponseBody(HttpResponse) 
Redundant null check at HttpResponseUtils.java:is known to be non-null in 
org.apache.hadoop.fs.swift.util.HttpResponseUtils.getResponseBody(HttpResponse) 
Redundant null check at HttpResponseUtils.java:[line 52] 
       Redundant nullcheck of instream which is known to be null in 
org.apache.hadoop.fs.swift.util.HttpResponseUtils.getResponseBody(HttpResponse) 
Redundant null check at HttpResponseUtils.java:is known to be null in 
org.apache.hadoop.fs.swift.util.HttpResponseUtils.getResponseBody(HttpResponse) 
Redundant null check at HttpResponseUtils.java:[line 70] 
       Nullcheck of fs at line 65 of value previously dereferenced in 
org.apache.hadoop.fs.viewfs.HCFSMountTableConfigLoader.load(String, 
Configuration) At HCFSMountTableConfigLoader.java:65 of value previously 
dereferenced in 
org.apache.hadoop.fs.viewfs.HCFSMountTableConfigLoader.load(String, 
Configuration) At HCFSMountTableConfigLoader.java:[line 65] 
       Nullcheck of iterator at line 302 of value previously dereferenced in 
org.apache.hadoop.hdfs.server.aliasmap.InMemoryAliasMap.createSnapshot(InMemoryAliasMap)
 At InMemoryAliasMap.java:302 of value previously dereferenced in 
org.apache.hadoop.hdfs.server.aliasmap.InMemoryAliasMap.createSnapshot(InMemoryAliasMap)
 At InMemoryAliasMap.java:[line 302] 
       Nullcheck of iterator at line 138 of value previously dereferenced in 
org.apache.hadoop.hdfs.server.aliasmap.InMemoryAliasMap.list(Optional) At 
InMemoryAliasMap.java:138 of value previously dereferenced in 
org.apache.hadoop.hdfs.server.aliasmap.InMemoryAliasMap.list(Optional) At 
InMemoryAliasMap.java:[line 138] 
       Nullcheck of dirStream at line 621 of value previously dereferenced in 
org.apache.hadoop.hdfs.server.common.Storage$StorageDirectory.checkEmptyCurrent()
 At Storage.java:621 of value previously dereferenced in 
org.apache.hadoop.hdfs.server.common.Storage$StorageDirectory.checkEmptyCurrent()
 At Storage.java:[line 621] 
       Nullcheck of pair at line 623 of value previously dereferenced in 
org.apache.hadoop.hdfs.server.datanode.BlockChecksumHelper$BlockGroupNonStripedChecksumComputer.checksumBlock(ExtendedBlock,
 int, Token, DatanodeInfo) At BlockChecksumHelper.java:623 of value previously 
dereferenced in 
org.apache.hadoop.hdfs.server.datanode.BlockChecksumHelper$BlockGroupNonStripedChecksumComputer.checksumBlock(ExtendedBlock,
 int, Token, DatanodeInfo) At BlockChecksumHelper.java:[line 623] 
       Nullcheck of instr at line 1182 of value previously dereferenced in 
org.apache.hadoop.hdfs.server.datanode.BlockReceiver.computePartialChunkCrc(long,
 long) At BlockReceiver.java:1182 of value previously dereferenced in 
org.apache.hadoop.hdfs.server.datanode.BlockReceiver.computePartialChunkCrc(long,
 long) At BlockReceiver.java:[line 1182] 
       Redundant nullcheck of oldLock, which is known to be non-null in 
org.apache.hadoop.hdfs.server.datanode.DataStorage.isPreUpgradableLayout(Storage$StorageDirectory)
 Redundant null check at DataStorage.java:is known to be non-null in 
org.apache.hadoop.hdfs.server.datanode.DataStorage.isPreUpgradableLayout(Storage$StorageDirectory)
 Redundant null check at DataStorage.java:[line 694] 
       Nullcheck of volumes at line 601 of value previously dereferenced in 
org.apache.hadoop.hdfs.server.datanode.DirectoryScanner.getVolumeReports() At 
DirectoryScanner.java:601 of value previously dereferenced in 
org.apache.hadoop.hdfs.server.datanode.DirectoryScanner.getVolumeReports() At 
DirectoryScanner.java:[line 601] 
       Nullcheck of volumeReferences at line 214 of value previously 
dereferenced in 
org.apache.hadoop.hdfs.server.datanode.DiskBalancer.getFsVolume(FsDatasetSpi, 
String) At DiskBalancer.java:214 of value previously dereferenced in 
org.apache.hadoop.hdfs.server.datanode.DiskBalancer.getFsVolume(FsDatasetSpi, 
String) At DiskBalancer.java:[line 214] 
       Nullcheck of dataIn at line 1233 of value previously dereferenced in 
org.apache.hadoop.hdfs.server.datanode.fsdataset.impl.FsDatasetImpl.computeChecksum(ReplicaInfo,
 File, int, Configuration) At FsDatasetImpl.java:1233 of value previously 
dereferenced in 
org.apache.hadoop.hdfs.server.datanode.fsdataset.impl.FsDatasetImpl.computeChecksum(ReplicaInfo,
 File, int, Configuration) At FsDatasetImpl.java:[line 1233] 
       Nullcheck of ref at line 243 of value previously dereferenced in 
org.apache.hadoop.hdfs.server.datanode.fsdataset.impl.RamDiskAsyncLazyPersistService$ReplicaLazyPersistTask.run()
 At RamDiskAsyncLazyPersistService.java:243 of value previously dereferenced in 
org.apache.hadoop.hdfs.server.datanode.fsdataset.impl.RamDiskAsyncLazyPersistService$ReplicaLazyPersistTask.run()
 At RamDiskAsyncLazyPersistService.java:[line 243] 
       Nullcheck of beforeStream at line 131 of value previously dereferenced 
in 
org.apache.hadoop.hdfs.server.diskbalancer.command.PlanCommand.execute(CommandLine)
 At PlanCommand.java:131 of value previously dereferenced in 
org.apache.hadoop.hdfs.server.diskbalancer.command.PlanCommand.execute(CommandLine)
 At PlanCommand.java:[line 131] 
       Nullcheck of planStream at line 162 of value previously dereferenced in 
org.apache.hadoop.hdfs.server.diskbalancer.command.PlanCommand.execute(CommandLine)
 At PlanCommand.java:162 of value previously dereferenced in 
org.apache.hadoop.hdfs.server.diskbalancer.command.PlanCommand.execute(CommandLine)
 At PlanCommand.java:[line 162] 
       Nullcheck of out at line 328 of value previously dereferenced in 
org.apache.hadoop.hdfs.server.namenode.ImageWriter.writeMD5(String) At 
ImageWriter.java:328 of value previously dereferenced in 
org.apache.hadoop.hdfs.server.namenode.ImageWriter.writeMD5(String) At 
ImageWriter.java:[line 328] 
       Nullcheck of in at line 236 of value previously dereferenced in 
org.apache.hadoop.hdfs.web.ByteRangeInputStream.read(long, byte[], int, int) At 
ByteRangeInputStream.java:236 of value previously dereferenced in 
org.apache.hadoop.hdfs.web.ByteRangeInputStream.read(long, byte[], int, int) At 
ByteRangeInputStream.java:[line 236] 
       Nullcheck of channel at line 430 of value previously dereferenced in 
org.apache.hadoop.io.IOUtils.fsync(File) At IOUtils.java:430 of value 
previously dereferenced in org.apache.hadoop.io.IOUtils.fsync(File) At 
IOUtils.java:[line 430] 
       Nullcheck of stream at line 389 of value previously dereferenced in 
org.apache.hadoop.io.IOUtils.listDirectory(File, FilenameFilter) At 
IOUtils.java:389 of value previously dereferenced in 
org.apache.hadoop.io.IOUtils.listDirectory(File, FilenameFilter) At 
IOUtils.java:[line 389] 
       Nullcheck of fsdis at line 152 of value previously dereferenced in 
org.apache.hadoop.tools.dynamometer.SimulatedDataNodes.run(String[]) At 
SimulatedDataNodes.java:152 of value previously dereferenced in 
org.apache.hadoop.tools.dynamometer.SimulatedDataNodes.run(String[]) At 
SimulatedDataNodes.java:[line 152] 
       Redundant nullcheck of is, which is known to be non-null in 
org.apache.hadoop.util.ApplicationClassLoader.<static initializer for 
ApplicationClassLoader>() Redundant null check at 
ApplicationClassLoader.java:is known to be non-null in 
org.apache.hadoop.util.ApplicationClassLoader.<static initializer for 
ApplicationClassLoader>() Redundant null check at 
ApplicationClassLoader.java:[line 79] 
       Redundant nullcheck of resStream, which is known to be non-null in 
org.apache.hadoop.util.JsonSerialization.fromResource(String) Redundant null 
check at JsonSerialization.java:is known to be non-null in 
org.apache.hadoop.util.JsonSerialization.fromResource(String) Redundant null 
check at JsonSerialization.java:[line 213] 
       Nullcheck of dataInputStream at line 248 of value previously 
dereferenced in org.apache.hadoop.util.JsonSerialization.load(FileSystem, Path) 
At JsonSerialization.java:248 of value previously dereferenced in 
org.apache.hadoop.util.JsonSerialization.load(FileSystem, Path) At 
JsonSerialization.java:[line 248] 
       Nullcheck of in at line 204 of value previously dereferenced in 
org.apache.hadoop.util.RunJar.unJar(File, File, Pattern) At RunJar.java:204 of 
value previously dereferenced in org.apache.hadoop.util.RunJar.unJar(File, 
File, Pattern) At RunJar.java:[line 204] 
       Nullcheck of out at line 536 of value previously dereferenced in 
org.apache.hadoop.yarn.logaggregation.AggregatedLogFormat$LogWriter.append(AggregatedLogFormat$LogKey,
 AggregatedLogFormat$LogValue) At AggregatedLogFormat.java:536 of value 
previously dereferenced in 
org.apache.hadoop.yarn.logaggregation.AggregatedLogFormat$LogWriter.append(AggregatedLogFormat$LogKey,
 AggregatedLogFormat$LogValue) At AggregatedLogFormat.java:[line 536] 
       Nullcheck of out at line 519 of value previously dereferenced in 
org.apache.hadoop.yarn.logaggregation.AggregatedLogFormat$LogWriter.writeApplicationACLs(Map)
 At AggregatedLogFormat.java:519 of value previously dereferenced in 
org.apache.hadoop.yarn.logaggregation.AggregatedLogFormat$LogWriter.writeApplicationACLs(Map)
 At AggregatedLogFormat.java:[line 519] 
       Nullcheck of out at line 509 of value previously dereferenced in 
org.apache.hadoop.yarn.logaggregation.AggregatedLogFormat$LogWriter.writeApplicationOwner(String)
 At AggregatedLogFormat.java:509 of value previously dereferenced in 
org.apache.hadoop.yarn.logaggregation.AggregatedLogFormat$LogWriter.writeApplicationOwner(String)
 At AggregatedLogFormat.java:[line 509] 
       Nullcheck of out at line 512 of value previously dereferenced in 
org.apache.hadoop.yarn.logaggregation.AggregatedLogFormat$LogWriter.writeApplicationOwner(String)
 At AggregatedLogFormat.java:512 of value previously dereferenced in 
org.apache.hadoop.yarn.logaggregation.AggregatedLogFormat$LogWriter.writeApplicationOwner(String)
 At AggregatedLogFormat.java:[line 512] 
       Nullcheck of out at line 500 of value previously dereferenced in 
org.apache.hadoop.yarn.logaggregation.AggregatedLogFormat$LogWriter.writeVersion()
 At AggregatedLogFormat.java:500 of value previously dereferenced in 
org.apache.hadoop.yarn.logaggregation.AggregatedLogFormat$LogWriter.writeVersion()
 At AggregatedLogFormat.java:[line 500] 
       Nullcheck of out at line 503 of value previously dereferenced in 
org.apache.hadoop.yarn.logaggregation.AggregatedLogFormat$LogWriter.writeVersion()
 At AggregatedLogFormat.java:503 of value previously dereferenced in 
org.apache.hadoop.yarn.logaggregation.AggregatedLogFormat$LogWriter.writeVersion()
 At AggregatedLogFormat.java:[line 503] 
       Nullcheck of out at line 439 of value previously dereferenced in 
org.apache.hadoop.yarn.server.nodemanager.DefaultContainerExecutor$LocalWrapperScriptBuilder.writeLocalWrapperScript(Path,
 Path) At DefaultContainerExecutor.java:439 of value previously dereferenced in 
org.apache.hadoop.yarn.server.nodemanager.DefaultContainerExecutor$LocalWrapperScriptBuilder.writeLocalWrapperScript(Path,
 Path) At DefaultContainerExecutor.java:[line 439] 
       Nullcheck of out at line 510 of value previously dereferenced in 
org.apache.hadoop.yarn.server.nodemanager.DefaultContainerExecutor$UnixLocalWrapperScriptBuilder.writeSessionScript(Path,
 Path) At DefaultContainerExecutor.java:510 of value previously dereferenced in 
org.apache.hadoop.yarn.server.nodemanager.DefaultContainerExecutor$UnixLocalWrapperScriptBuilder.writeSessionScript(Path,
 Path) At DefaultContainerExecutor.java:[line 510] 
       Nullcheck of it at line 103 of value previously dereferenced in 
org.apache.hadoop.yarn.server.nodemanager.DeletionService.recover(NMStateStoreService$RecoveredDeletionServiceState)
 At DeletionService.java:103 of value previously dereferenced in 
org.apache.hadoop.yarn.server.nodemanager.DeletionService.recover(NMStateStoreService$RecoveredDeletionServiceState)
 At DeletionService.java:[line 103] 
       Nullcheck of rasIterator at line 371 of value previously dereferenced in 
org.apache.hadoop.yarn.server.nodemanager.containermanager.ContainerManagerImpl.recover()
 At ContainerManagerImpl.java:371 of value previously dereferenced in 
org.apache.hadoop.yarn.server.nodemanager.containermanager.ContainerManagerImpl.recover()
 At ContainerManagerImpl.java:[line 371] 
       Nullcheck of rcsIterator at line 380 of value previously dereferenced in 
org.apache.hadoop.yarn.server.nodemanager.containermanager.ContainerManagerImpl.recover()
 At ContainerManagerImpl.java:380 of value previously dereferenced in 
org.apache.hadoop.yarn.server.nodemanager.containermanager.ContainerManagerImpl.recover()
 At ContainerManagerImpl.java:[line 380] 
       Nullcheck of containerScriptOutStream at line 341 of value previously 
dereferenced in 
org.apache.hadoop.yarn.server.nodemanager.containermanager.launcher.ContainerLaunch.call()
 At ContainerLaunch.java:341 of value previously dereferenced in 
org.apache.hadoop.yarn.server.nodemanager.containermanager.launcher.ContainerLaunch.call()
 At ContainerLaunch.java:[line 341] 
       Nullcheck of keystoreOutStream at line 291 of value previously 
dereferenced in 
org.apache.hadoop.yarn.server.nodemanager.containermanager.launcher.ContainerLaunch.call()
 At ContainerLaunch.java:291 of value previously dereferenced in 
org.apache.hadoop.yarn.server.nodemanager.containermanager.launcher.ContainerLaunch.call()
 At ContainerLaunch.java:[line 291] 
       Nullcheck of truststoreOutStream at line 309 of value previously 
dereferenced in 
org.apache.hadoop.yarn.server.nodemanager.containermanager.launcher.ContainerLaunch.call()
 At ContainerLaunch.java:309 of value previously dereferenced in 
org.apache.hadoop.yarn.server.nodemanager.containermanager.launcher.ContainerLaunch.call()
 At ContainerLaunch.java:[line 309] 
       Nullcheck of stream at line 182 of value previously dereferenced in 
org.apache.hadoop.yarn.server.nodemanager.containermanager.linux.runtime.JavaSandboxLinuxContainerRuntime.initializePolicyDir()
 At JavaSandboxLinuxContainerRuntime.java:182 of value previously dereferenced 
in 
org.apache.hadoop.yarn.server.nodemanager.containermanager.linux.runtime.JavaSandboxLinuxContainerRuntime.initializePolicyDir()
 At JavaSandboxLinuxContainerRuntime.java:[line 182] 
       Redundant nullcheck of it, which is known to be non-null in 
org.apache.hadoop.yarn.server.nodemanager.containermanager.localizer.ResourceLocalizationService.recoverTrackerResources(LocalResourcesTracker,
 NMStateStoreService$LocalResourceTrackerState) Redundant null check at 
ResourceLocalizationService.java:is known to be non-null in 
org.apache.hadoop.yarn.server.nodemanager.containermanager.localizer.ResourceLocalizationService.recoverTrackerResources(LocalResourcesTracker,
 NMStateStoreService$LocalResourceTrackerState) Redundant null check at 
ResourceLocalizationService.java:[line 343] 
       Redundant nullcheck of it, which is known to be non-null in 
org.apache.hadoop.yarn.server.nodemanager.containermanager.localizer.ResourceLocalizationService.recoverTrackerResources(LocalResourcesTracker,
 NMStateStoreService$LocalResourceTrackerState) Redundant null check at 
ResourceLocalizationService.java:is known to be non-null in 
org.apache.hadoop.yarn.server.nodemanager.containermanager.localizer.ResourceLocalizationService.recoverTrackerResources(LocalResourcesTracker,
 NMStateStoreService$LocalResourceTrackerState) Redundant null check at 
ResourceLocalizationService.java:[line 356] 
       Nullcheck of it at line 307 of value previously dereferenced in 
org.apache.hadoop.yarn.server.nodemanager.containermanager.localizer.ResourceLocalizationService.recoverLocalizedResources(NMStateStoreService$RecoveredLocalizationState)
 At ResourceLocalizationService.java:307 of value previously dereferenced in 
org.apache.hadoop.yarn.server.nodemanager.containermanager.localizer.ResourceLocalizationService.recoverLocalizedResources(NMStateStoreService$RecoveredLocalizationState)
 At ResourceLocalizationService.java:[line 307] 
       Nullcheck of batch at line 1433 of value previously dereferenced in 
org.apache.hadoop.yarn.server.nodemanager.recovery.NMLeveldbStateStoreService.storeAssignedResources(Container,
 String, List) At NMLeveldbStateStoreService.java:1433 of value previously 
dereferenced in 
org.apache.hadoop.yarn.server.nodemanager.recovery.NMLeveldbStateStoreService.storeAssignedResources(Container,
 String, List) At NMLeveldbStateStoreService.java:[line 1433] 
       Nullcheck of batch at line 464 of value previously dereferenced in 
org.apache.hadoop.yarn.server.nodemanager.recovery.NMLeveldbStateStoreService.storeContainer(ContainerId,
 int, long, StartContainerRequest) At NMLeveldbStateStoreService.java:464 of 
value previously dereferenced in 
org.apache.hadoop.yarn.server.nodemanager.recovery.NMLeveldbStateStoreService.storeContainer(ContainerId,
 int, long, StartContainerRequest) At NMLeveldbStateStoreService.java:[line 
464] 
       Nullcheck of it at line 96 of value previously dereferenced in 
org.apache.hadoop.yarn.server.nodemanager.security.NMContainerTokenSecretManager.recover()
 At NMContainerTokenSecretManager.java:96 of value previously dereferenced in 
org.apache.hadoop.yarn.server.nodemanager.security.NMContainerTokenSecretManager.recover()
 At NMContainerTokenSecretManager.java:[line 96] 
       Nullcheck of it at line 94 of value previously dereferenced in 
org.apache.hadoop.yarn.server.nodemanager.security.NMTokenSecretManagerInNM.recover()
 At NMTokenSecretManagerInNM.java:94 of value previously dereferenced in 
org.apache.hadoop.yarn.server.nodemanager.security.NMTokenSecretManagerInNM.recover()
 At NMTokenSecretManagerInNM.java:[line 94] 
       Nullcheck of batch at line 596 of value previously dereferenced in 
org.apache.hadoop.yarn.server.resourcemanager.recovery.LeveldbRMStateStore.removeApplicationStateInternal(ApplicationStateData)
 At LeveldbRMStateStore.java:596 of value previously dereferenced in 
org.apache.hadoop.yarn.server.resourcemanager.recovery.LeveldbRMStateStore.removeApplicationStateInternal(ApplicationStateData)
 At LeveldbRMStateStore.java:[line 596] 
       Nullcheck of batch at line 637 of value previously dereferenced in 
org.apache.hadoop.yarn.server.resourcemanager.recovery.LeveldbRMStateStore.removeReservationState(String,
 String) At LeveldbRMStateStore.java:637 of value previously dereferenced in 
org.apache.hadoop.yarn.server.resourcemanager.recovery.LeveldbRMStateStore.removeReservationState(String,
 String) At LeveldbRMStateStore.java:[line 637] 
       Nullcheck of batch at line 655 of value previously dereferenced in 
org.apache.hadoop.yarn.server.resourcemanager.recovery.LeveldbRMStateStore.storeOrUpdateRMDT(RMDelegationTokenIdentifier,
 Long, boolean) At LeveldbRMStateStore.java:655 of value previously 
dereferenced in 
org.apache.hadoop.yarn.server.resourcemanager.recovery.LeveldbRMStateStore.storeOrUpdateRMDT(RMDelegationTokenIdentifier,
 Long, boolean) At LeveldbRMStateStore.java:[line 655] 
       Nullcheck of batch at line 746 of value previously dereferenced in 
org.apache.hadoop.yarn.server.resourcemanager.recovery.LeveldbRMStateStore.storeProxyCACertState(X509Certificate,
 PrivateKey) At LeveldbRMStateStore.java:746 of value previously dereferenced 
in 
org.apache.hadoop.yarn.server.resourcemanager.recovery.LeveldbRMStateStore.storeProxyCACertState(X509Certificate,
 PrivateKey) At LeveldbRMStateStore.java:[line 746] 
       Nullcheck of batch at line 622 of value previously dereferenced in 
org.apache.hadoop.yarn.server.resourcemanager.recovery.LeveldbRMStateStore.storeReservationState(YarnProtos$ReservationAllocationStateProto,
 String, String) At LeveldbRMStateStore.java:622 of value previously 
dereferenced in 
org.apache.hadoop.yarn.server.resourcemanager.recovery.LeveldbRMStateStore.storeReservationState(YarnProtos$ReservationAllocationStateProto,
 String, String) At LeveldbRMStateStore.java:[line 622] 
       Nullcheck of in at line 268 of value previously dereferenced in 
org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.conf.FSSchedulerConfigurationStore.getConfigVersion()
 At FSSchedulerConfigurationStore.java:268 of value previously dereferenced in 
org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.conf.FSSchedulerConfigurationStore.getConfigVersion()
 At FSSchedulerConfigurationStore.java:[line 268] 
       Nullcheck of out at line 258 of value previously dereferenced in 
org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.conf.FSSchedulerConfigurationStore.writeConfigVersion(long)
 At FSSchedulerConfigurationStore.java:258 of value previously dereferenced in 
org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.conf.FSSchedulerConfigurationStore.writeConfigVersion(long)
 At FSSchedulerConfigurationStore.java:[line 258] 
       Nullcheck of entityIterator at line 176 of value previously dereferenced 
in 
org.apache.hadoop.yarn.server.timeline.KeyValueBasedTimelineStore.getEntities(String,
 Long, Long, Long, String, Long, NameValuePair, Collection, EnumSet, 
TimelineDataManager$CheckAcl) At KeyValueBasedTimelineStore.java:176 of value 
previously dereferenced in 
org.apache.hadoop.yarn.server.timeline.KeyValueBasedTimelineStore.getEntities(String,
 Long, Long, Long, String, Long, NameValuePair, Collection, EnumSet, 
TimelineDataManager$CheckAcl) At KeyValueBasedTimelineStore.java:[line 131] 
       Nullcheck of iterator at line 1503 of value previously dereferenced in 
org.apache.hadoop.yarn.server.timeline.RollingLevelDBTimelineStore.evictOldStartTimes(long)
 At RollingLevelDBTimelineStore.java:1503 of value previously dereferenced in 
org.apache.hadoop.yarn.server.timeline.RollingLevelDBTimelineStore.evictOldStartTimes(long)
 At RollingLevelDBTimelineStore.java:[line 1503] 
       Nullcheck of iterator at line 1733 of value previously dereferenced in 
org.apache.hadoop.yarn.server.timeline.RollingLevelDBTimelineStore.getDomain(String)
 At RollingLevelDBTimelineStore.java:1733 of value previously dereferenced in 
org.apache.hadoop.yarn.server.timeline.RollingLevelDBTimelineStore.getDomain(String)
 At RollingLevelDBTimelineStore.java:[line 1733] 
       Nullcheck of iterator at line 1742 of value previously dereferenced in 
org.apache.hadoop.yarn.server.timeline.RollingLevelDBTimelineStore.getDomains(String)
 At RollingLevelDBTimelineStore.java:1742 of value previously dereferenced in 
org.apache.hadoop.yarn.server.timeline.RollingLevelDBTimelineStore.getDomains(String)
 At RollingLevelDBTimelineStore.java:[line 1742] 
       Nullcheck of iterator at line 429 of value previously dereferenced in 
org.apache.hadoop.yarn.server.timeline.RollingLevelDBTimelineStore.getEntity(String,
 String, EnumSet) At RollingLevelDBTimelineStore.java:429 of value previously 
dereferenced in 
org.apache.hadoop.yarn.server.timeline.RollingLevelDBTimelineStore.getEntity(String,
 String, EnumSet) At RollingLevelDBTimelineStore.java:[line 429] 
       Nullcheck of iterator at line 737 of value previously dereferenced in 
org.apache.hadoop.yarn.server.timeline.RollingLevelDBTimelineStore.getEntityByTime(byte[],
 String, Long, Long, Long, String, Long, Collection, EnumSet, 
TimelineDataManager$CheckAcl, boolean) At RollingLevelDBTimelineStore.java:737 
of value previously dereferenced in 
org.apache.hadoop.yarn.server.timeline.RollingLevelDBTimelineStore.getEntityByTime(byte[],
 String, Long, Long, Long, String, Long, Collection, EnumSet, 
TimelineDataManager$CheckAcl, boolean) At 
RollingLevelDBTimelineStore.java:[line 737] 
       Nullcheck of iterator at line 607 of value previously dereferenced in 
org.apache.hadoop.yarn.server.timeline.RollingLevelDBTimelineStore.getEntityTimelines(String,
 SortedSet, Long, Long, Long, Set) At RollingLevelDBTimelineStore.java:607 of 
value previously dereferenced in 
org.apache.hadoop.yarn.server.timeline.RollingLevelDBTimelineStore.getEntityTimelines(String,
 SortedSet, Long, Long, Long, Set) At RollingLevelDBTimelineStore.java:[line 
607] 
       Nullcheck of domainWriteBatch at line 1645 of value previously 
dereferenced in 
org.apache.hadoop.yarn.server.timeline.RollingLevelDBTimelineStore.put(TimelineDomain)
 At RollingLevelDBTimelineStore.java:1645 of value previously dereferenced in 
org.apache.hadoop.yarn.server.timeline.RollingLevelDBTimelineStore.put(TimelineDomain)
 At RollingLevelDBTimelineStore.java:[line 1645] 
       Nullcheck of ownerWriteBatch at line 1646 of value previously 
dereferenced in 
org.apache.hadoop.yarn.server.timeline.RollingLevelDBTimelineStore.put(TimelineDomain)
 At RollingLevelDBTimelineStore.java:1646 of value previously dereferenced in 
org.apache.hadoop.yarn.server.timeline.RollingLevelDBTimelineStore.put(TimelineDomain)
 At RollingLevelDBTimelineStore.java:[line 1646] 
       Nullcheck of localFS at line 294 of value previously dereferenced in 
org.apache.hadoop.yarn.server.timeline.RollingLevelDBTimelineStore.serviceInit(Configuration)
 At RollingLevelDBTimelineStore.java:294 of value previously dereferenced in 
org.apache.hadoop.yarn.server.timeline.RollingLevelDBTimelineStore.serviceInit(Configuration)
 At RollingLevelDBTimelineStore.java:[line 294] 
       Boxed value is unboxed and then immediately reboxed in 
org.apache.hadoop.yarn.server.timelineservice.storage.common.ColumnRWHelper.readResultsWithTimestamps(Result,
 byte[], byte[], KeyConverter, ValueConverter, boolean) At 
ColumnRWHelper.java:then immediately reboxed in 
org.apache.hadoop.yarn.server.timelineservice.storage.common.ColumnRWHelper.readResultsWithTimestamps(Result,
 byte[], byte[], KeyConverter, ValueConverter, boolean) At 
ColumnRWHelper.java:[line 333] 
       Nullcheck of fs at line 75 of value previously dereferenced in 
org.apache.hadoop.yarn.server.timelineservice.storage.common.HBaseTimelineStorageUtils.getTimelineServiceHBaseConf(Configuration)
 At HBaseTimelineStorageUtils.java:75 of value previously dereferenced in 
org.apache.hadoop.yarn.server.timelineservice.storage.common.HBaseTimelineStorageUtils.getTimelineServiceHBaseConf(Configuration)
 At HBaseTimelineStorageUtils.java:[line 75] 
       Nullcheck of results at line 95 of value previously dereferenced in 
org.apache.hadoop.yarn.server.timelineservice.storage.reader.EntityTypeReader.readEntityTypes(Configuration,
 Connection) At EntityTypeReader.java:95 of value previously dereferenced in 
org.apache.hadoop.yarn.server.timelineservice.storage.reader.EntityTypeReader.readEntityTypes(Configuration,
 Connection) At EntityTypeReader.java:[line 95] 
       Nullcheck of os at line 401 of value previously dereferenced in 
org.apache.hadoop.yarn.service.provider.ProviderUtils.resolvePropsInConfigFileAndSaveOnHdfs(SliderFileSystem,
 Map, ComponentInstance, ConfigFile, String, Path) At ProviderUtils.java:401 of 
value previously dereferenced in 
org.apache.hadoop.yarn.service.provider.ProviderUtils.resolvePropsInConfigFileAndSaveOnHdfs(SliderFileSystem,
 Map, ComponentInstance, ConfigFile, String, Path) At ProviderUtils.java:[line 
401] 
       Redundant nullcheck of resStream, which is known to be non-null in 
org.apache.hadoop.yarn.service.utils.JsonSerDeser.fromResource(String) 
Redundant null check at JsonSerDeser.java:is known to be non-null in 
org.apache.hadoop.yarn.service.utils.JsonSerDeser.fromResource(String) 
Redundant null check at JsonSerDeser.java:[line 123] 

    Failed junit tests :

       hadoop.yarn.client.api.impl.TestAMRMClient 
       hadoop.yarn.client.TestRMFailoverProxyProvider 
       hadoop.yarn.client.TestNoHaRMFailoverProxyProvider 
       
hadoop.yarn.server.timelineservice.reader.TestTimelineReaderWebServicesHBaseStorage
 
       hadoop.yarn.server.router.webapp.TestRouterWebServicesREST 
       
hadoop.yarn.server.timelineservice.documentstore.TestDocumentStoreCollectionCreator
 
       
hadoop.yarn.server.timelineservice.documentstore.TestDocumentStoreTimelineReaderImpl
 
       
hadoop.yarn.server.timelineservice.documentstore.TestDocumentStoreTimelineWriterImpl
 
       
hadoop.yarn.server.timelineservice.documentstore.writer.cosmosdb.TestCosmosDBDocumentStoreWriter
 
       
hadoop.yarn.server.timelineservice.documentstore.reader.cosmosdb.TestCosmosDBDocumentStoreReader
 
       hadoop.yarn.applications.distributedshell.TestDistributedShell 
       hadoop.tools.dynamometer.TestDynamometerInfra 
       hadoop.tools.dynamometer.TestDynamometerInfra 
       hadoop.fs.azure.TestNativeAzureFileSystemOperationsMocked 
       hadoop.fs.azure.TestOutOfBandAzureBlobOperations 
       hadoop.fs.azure.TestNativeAzureFileSystemFileNameCheck 
       hadoop.fs.azure.TestNativeAzureFileSystemMocked 
       hadoop.fs.azure.TestWasbFsck 
       hadoop.fs.azure.TestNativeAzureFileSystemContractMocked 
       hadoop.fs.azure.TestBlobMetadata 
       hadoop.fs.azure.TestNativeAzureFileSystemConcurrency 
       hadoop.yarn.sls.TestReservationSystemInvariants 
      

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