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ASF GitHub Bot logged work on HDFS-15237: ----------------------------------------- Author: ASF GitHub Bot Created on: 15/Sep/20 11:46 Start Date: 15/Sep/20 11:46 Worklog Time Spent: 10m Work Description: zhaoyim opened a new pull request #2306: URL: https://github.com/apache/hadoop/pull/2306 … or corrupt ## NOTICE Please create an issue in ASF JIRA before opening a pull request, and you need to set the title of the pull request which starts with the corresponding JIRA issue number. (e.g. HADOOP-XXXXX. Fix a typo in YYY.) For more details, please see https://cwiki.apache.org/confluence/display/HADOOP/How+To+Contribute ---------------------------------------------------------------- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. For queries about this service, please contact Infrastructure at: us...@infra.apache.org Issue Time Tracking ------------------- Worklog Id: (was: 484444) Remaining Estimate: 0h Time Spent: 10m > Get checksum of EC file failed, when some block is missing or corrupt > --------------------------------------------------------------------- > > Key: HDFS-15237 > URL: https://issues.apache.org/jira/browse/HDFS-15237 > Project: Hadoop HDFS > Issue Type: Bug > Components: ec, hdfs > Affects Versions: 3.2.1 > Reporter: zhengchenyu > Priority: Major > Fix For: 3.2.2 > > Attachments: HDFS-15237.001.patch > > Time Spent: 10m > Remaining Estimate: 0h > > When we distcp from an ec directory to another one, I found some error like > this. > {code} > 2020-03-20 20:18:21,366 WARN [main] > org.apache.hadoop.hdfs.FileChecksumHelper: src=/EC/6-3/****/000325_0, > datanodes[6]=DatanodeInfoWithStorage[10.200.128.40:9866,DS-65ac4407-9d33-4c59-8f72-dd1d80d26d9f,DISK]2020-03-20 > 20:18:21,366 WARN [main] org.apache.hadoop.hdfs.FileChecksumHelper: > src=/EC/6-3/****/000325_0, > datanodes[6]=DatanodeInfoWithStorage[10.200.128.40:9866,DS-65ac4407-9d33-4c59-8f72-dd1d80d26d9f,DISK]java.io.EOFException: > Unexpected EOF while trying to read response from server at > org.apache.hadoop.hdfs.protocolPB.PBHelperClient.vintPrefixed(PBHelperClient.java:550) > at > org.apache.hadoop.hdfs.FileChecksumHelper$StripedFileNonStripedChecksumComputer.tryDatanode(FileChecksumHelper.java:709) > at > org.apache.hadoop.hdfs.FileChecksumHelper$StripedFileNonStripedChecksumComputer.checksumBlockGroup(FileChecksumHelper.java:664) > at > org.apache.hadoop.hdfs.FileChecksumHelper$StripedFileNonStripedChecksumComputer.checksumBlocks(FileChecksumHelper.java:638) > at > org.apache.hadoop.hdfs.FileChecksumHelper$FileChecksumComputer.compute(FileChecksumHelper.java:252) > at > org.apache.hadoop.hdfs.DFSClient.getFileChecksumInternal(DFSClient.java:1790) > at > org.apache.hadoop.hdfs.DFSClient.getFileChecksumWithCombineMode(DFSClient.java:1810) > at > org.apache.hadoop.hdfs.DistributedFileSystem$33.doCall(DistributedFileSystem.java:1691) > at > org.apache.hadoop.hdfs.DistributedFileSystem$33.doCall(DistributedFileSystem.java:1688) > at > org.apache.hadoop.fs.FileSystemLinkResolver.resolve(FileSystemLinkResolver.java:81) > at > org.apache.hadoop.hdfs.DistributedFileSystem.getFileChecksum(DistributedFileSystem.java:1700) > at > org.apache.hadoop.tools.mapred.RetriableFileCopyCommand.doCopy(RetriableFileCopyCommand.java:138) > at > org.apache.hadoop.tools.mapred.RetriableFileCopyCommand.doExecute(RetriableFileCopyCommand.java:115) > at > org.apache.hadoop.tools.util.RetriableCommand.execute(RetriableCommand.java:87) > at > org.apache.hadoop.tools.mapred.CopyMapper.copyFileWithRetry(CopyMapper.java:259) > at org.apache.hadoop.tools.mapred.CopyMapper.map(CopyMapper.java:220) at > org.apache.hadoop.tools.mapred.CopyMapper.map(CopyMapper.java:48) at > org.apache.hadoop.mapreduce.Mapper.run(Mapper.java:146) at > org.apache.hadoop.mapred.MapTask.runNewMapper(MapTask.java:799) at > org.apache.hadoop.mapred.MapTask.run(MapTask.java:347) at > org.apache.hadoop.mapred.YarnChild$2.run(YarnChild.java:174) at > java.security.AccessController.doPrivileged(Native Method) at > javax.security.auth.Subject.doAs(Subject.java:422) at > org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1730) > at org.apache.hadoop.mapred.YarnChild.main(YarnChild.java:168) > {code} > And Then I found some error in datanode like this > {code} > 2020-03-20 20:54:16,573 INFO > org.apache.hadoop.hdfs.protocol.datatransfer.sasl.SaslDataTransferClient: > SASL encryption trust check: localHostTrusted = false, remoteHostTrusted = > false > 2020-03-20 20:54:16,577 ERROR > org.apache.hadoop.hdfs.server.datanode.DataNode: > bd-hadoop-128050.zeus.lianjia.com:9866:DataXceiver error processing > BLOCK_GROUP_CHECKSUM operation src: /10.201.1.38:33264 dst: > /10.200.128.50:9866 > java.lang.UnsupportedOperationException > at java.nio.ByteBuffer.array(ByteBuffer.java:994) > at > org.apache.hadoop.hdfs.server.datanode.erasurecode.StripedBlockChecksumReconstructor.reconstruct(StripedBlockChecksumReconstructor.java:90) > at > org.apache.hadoop.hdfs.server.datanode.BlockChecksumHelper$BlockGroupNonStripedChecksumComputer.recalculateChecksum(BlockChecksumHelper.java:711) > at > org.apache.hadoop.hdfs.server.datanode.BlockChecksumHelper$BlockGroupNonStripedChecksumComputer.compute(BlockChecksumHelper.java:489) > at > org.apache.hadoop.hdfs.server.datanode.DataXceiver.blockGroupChecksum(DataXceiver.java:1047) > at > org.apache.hadoop.hdfs.protocol.datatransfer.Receiver.opStripedBlockChecksum(Receiver.java:327) > at > org.apache.hadoop.hdfs.protocol.datatransfer.Receiver.processOp(Receiver.java:119) > at > org.apache.hadoop.hdfs.server.datanode.DataXceiver.run(DataXceiver.java:292) > at java.lang.Thread.run(Thread.java:748) > {code} > The reason is that: When some block is missing or corrupt, datanode will > trigger to call recalculateChecksum. But if > StripedBlockChecksumReconstructor.targetBuffer is DirectByteBuffer, we > couldn't use DirectByteBuffer.array(), so throw the exception. Then we > could't get checksum. -- This message was sent by Atlassian Jira (v8.3.4#803005) --------------------------------------------------------------------- To unsubscribe, e-mail: hdfs-issues-unsubscr...@hadoop.apache.org For additional commands, e-mail: hdfs-issues-h...@hadoop.apache.org