[ https://issues.apache.org/jira/browse/HDFS-10605?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
ade updated HDFS-10605: ----------------------- Priority: Minor (was: Major) > Can not synchronized call method of object and Mockito.spy(object), So > UT:testRemoveVolumeBeingWritten passed but maybe deadlock online > --------------------------------------------------------------------------------------------------------------------------------------- > > Key: HDFS-10605 > URL: https://issues.apache.org/jira/browse/HDFS-10605 > Project: Hadoop HDFS > Issue Type: Bug > Components: datanode > Affects Versions: 2.7.0, 2.8.0, 2.7.1, 2.7.2 > Reporter: ade > Priority: Minor > Labels: test > Attachments: TestDataNodeHotSwapVolumes.java.patch > > > The UT: TestDataNodeHotSwapVolumes.testRemoveVolumeBeingWritten can be ran > successful, but deadlock like HDFS-9874 maybe happen online. > * UT: > {code:title=TestDataNodeHotSwapVolumes.java|borderStyle=solid} > final FsDatasetSpi<? extends FsVolumeSpi> data = dn.data; > dn.data = Mockito.spy(data); > LOG.info("data hash:" + data.hashCode() + "; dn.data hash:" + > dn.data.hashCode()); > doAnswer(new Answer<Object>() { > public Object answer(InvocationOnMock invocation) > throws IOException, InterruptedException { > Thread.sleep(1000); > // Bypass the argument to FsDatasetImpl#finalizeBlock to verify > that > // the block is not removed, since the volume reference should not > // be released at this point. > data.finalizeBlock((ExtendedBlock) invocation.getArguments()[0]); > return null; > } > }).when(dn.data).finalizeBlock(any(ExtendedBlock.class)); > {code} > Two thread can run synchronized method dn.data.removeVolumes and > data.finalizeBlock concurrently because dn.data(mocked) and data is not the > same object(hash 1903955157 and 1508483764). > {noformat} > 2016-07-11 16:16:07,788 INFO [Thread-0] datanode.TestDataNodeHotSwapVolumes > (TestDataNodeHotSwapVolumes.java:testRemoveVolumeBeingWrittenForDatanode(599)) > - data hash:1903955157; dn.data hash:1508483764 > 2016-07-11 16:16:07,801 INFO [Thread-157] datanode.DataNode > (DataNode.java:reconfigurePropertyImpl(456)) - Reconfiguring > dfs.datanode.data.dir to > [DISK]file:/Users/ade/workspace/Hadoop/hadoop-hdfs-project/hadoop-hdfs/target/test/data/dfs/data/data2 > 2016-07-11 16:16:07,810 WARN [Thread-157] common.Util > (Util.java:stringAsURI(56)) - Path > /Users/ade/workspace/Hadoop/hadoop-hdfs-project/hadoop-hdfs/target/test/data/dfs/data/data1 > should be specified as a URI in configuration files. Please update hdfs > configuration. > 2016-07-11 16:16:07,811 INFO [Thread-157] datanode.DataNode > (DataNode.java:removeVolumes(674)) - Deactivating volumes (clear > failure=true): > /Users/ade/workspace/Hadoop/hadoop-hdfs-project/hadoop-hdfs/target/test/data/dfs/data/data1 > 2016-07-11 16:16:07,836 INFO [Thread-157] impl.FsDatasetImpl > (FsDatasetImpl.java:removeVolumes(459)) - Removing > /Users/ade/workspace/Hadoop/hadoop-hdfs-project/hadoop-hdfs/target/test/data/dfs/data/data1 > from FsDataset. > 2016-07-11 16:16:07,836 INFO [Thread-157] impl.FsDatasetImpl > (FsDatasetImpl.java:removeVolumes(463)) - removeVolumes of object > hash:1508483764 > 2016-07-11 16:16:07,836 INFO [Thread-157] datanode.BlockScanner > (BlockScanner.java:removeVolumeScanner(243)) - Removing scanner for volume > /Users/ade/workspace/Hadoop/hadoop-hdfs-project/hadoop-hdfs/target/test/data/dfs/data/data1 > (StorageID DS-f4df3404-9f02-470e-b202-75f5a4de29cb) > 2016-07-11 16:16:07,836 INFO > [VolumeScannerThread(/Users/ade/workspace/Hadoop/hadoop-hdfs-project/hadoop-hdfs/target/test/data/dfs/data/data1)] > datanode.VolumeScanner (VolumeScanner.java:run(630)) - > VolumeScanner(/Users/ade/workspace/Hadoop/hadoop-hdfs-project/hadoop-hdfs/target/test/data/dfs/data/data1, > DS-f4df3404-9f02-470e-b202-75f5a4de29cb) exiting. > 2016-07-11 16:16:07,891 INFO [IPC Server handler 7 on 63546] > blockmanagement.DatanodeDescriptor > (DatanodeDescriptor.java:pruneStorageMap(517)) - Removed storage > [DISK]DS-f4df3404-9f02-470e-b202-75f5a4de29cb:NORMAL:127.0.0.1:63548 from > DataNode127.0.0.1:63548 > 2016-07-11 16:16:07,908 INFO [IPC Server handler 9 on 63546] > blockmanagement.DatanodeDescriptor > (DatanodeDescriptor.java:updateStorage(866)) - Adding new storage ID > DS-f4df3404-9f02-470e-b202-75f5a4de29cb for DN 127.0.0.1:63548 > 2016-07-11 16:16:08,845 INFO [PacketResponder: > BP-1077872064-127.0.0.1-1468224964600:blk_1073741825_1001, > type=LAST_IN_PIPELINE, downstreams=0:[]] impl.FsDatasetImpl > (FsDatasetImpl.java:finalizeBlock(1559)) - finalizeBlock of object > hash:1903955157 > 2016-07-11 16:16:12,933 INFO [DataXceiver for client at /127.0.0.1:63574 > [Receiving block BP-1077872064-127.0.0.1-1468224964600:blk_1073741825_1001]] > impl.FsDatasetImpl (FsDatasetImpl.java:finalizeBlock(1559)) - finalizeBlock > of object hash:1903955157 > {noformat} > The UT ran passed. > * Online > When dn.data.removeVolumes the thread run in FsVolumeImpl.closeAndWait() with > dn.data lock and wait referenceCount() = 0, but the other DataXceiver thread > maybe blocked by dn.data lock and with referencing volume. This can be > happened like HDFS-9874. -- This message was sent by Atlassian JIRA (v6.3.4#6332) --------------------------------------------------------------------- To unsubscribe, e-mail: hdfs-issues-unsubscr...@hadoop.apache.org For additional commands, e-mail: hdfs-issues-h...@hadoop.apache.org