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From "Ajay Yadav (JIRA)" <j...@apache.org>
Subject [jira] [Assigned] (HDFS-12293) DataNode should log file name on disk error
Date Fri, 11 Aug 2017 19:50:01 GMT

     [ https://issues.apache.org/jira/browse/HDFS-12293?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Ajay Yadav reassigned HDFS-12293:
---------------------------------

    Assignee: Ajay Yadav

> DataNode should log file name on disk error
> -------------------------------------------
>
>                 Key: HDFS-12293
>                 URL: https://issues.apache.org/jira/browse/HDFS-12293
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: datanode
>            Reporter: Wei-Chiu Chuang
>            Assignee: Ajay Yadav
>              Labels: newbie
>
> Found the following error message in precommit build https://builds.apache.org/job/hadoop-qbt-trunk-java8-linux-x86/488/testReport/junit/org.apache.hadoop.hdfs.server.datanode/TestDataNodeVolumeFailureReporting/testSuccessiveVolumeFailures/
> {noformat}
> 2017-08-10 09:36:53,619 [DataXceiver for client DFSClient_NONMAPREDUCE_670847838_18 at
/127.0.0.1:55851 [Receiving block BP-219227751-172.17.0.2-1502357801473:blk_1073741829_1005]]
WARN  datanode.DataNode (BlockReceiver.java:<init>(287)) - IOException in BlockReceiver
constructor. Cause is 
> java.io.IOException: Not a directory
> 	at java.io.UnixFileSystem.createFileExclusively(Native Method)
> 	at java.io.File.createNewFile(File.java:1012)
> 	at org.apache.hadoop.hdfs.server.datanode.FileIoProvider.createFile(FileIoProvider.java:302)
> 	at org.apache.hadoop.hdfs.server.datanode.DatanodeUtil.createFileWithExistsCheck(DatanodeUtil.java:69)
> 	at org.apache.hadoop.hdfs.server.datanode.fsdataset.impl.BlockPoolSlice.createRbwFile(BlockPoolSlice.java:306)
> 	at org.apache.hadoop.hdfs.server.datanode.fsdataset.impl.FsVolumeImpl.createRbwFile(FsVolumeImpl.java:933)
> 	at org.apache.hadoop.hdfs.server.datanode.fsdataset.impl.FsVolumeImpl.createRbw(FsVolumeImpl.java:1202)
> 	at org.apache.hadoop.hdfs.server.datanode.fsdataset.impl.FsDatasetImpl.createRbw(FsDatasetImpl.java:1356)
> 	at org.apache.hadoop.hdfs.server.datanode.BlockReceiver.<init>(BlockReceiver.java:215)
> 	at org.apache.hadoop.hdfs.server.datanode.DataXceiver.getBlockReceiver(DataXceiver.java:1291)
> 	at org.apache.hadoop.hdfs.server.datanode.DataXceiver.writeBlock(DataXceiver.java:758)
> 	at org.apache.hadoop.hdfs.protocol.datatransfer.Receiver.opWriteBlock(Receiver.java:173)
> 	at org.apache.hadoop.hdfs.protocol.datatransfer.Receiver.processOp(Receiver.java:107)
> 	at org.apache.hadoop.hdfs.server.datanode.DataXceiver.run(DataXceiver.java:290)
> {noformat}
> It is not known what file was being created.
> What's interesting is that {{DatanodeUtil#createFileWithExistsCheck}} does carry file
name in the exception message, but the exception handler at {{DataTransfer#run()}} and {{BlockReceiver#BlockReceiver}}
ignores it:
> {code:title=BlockReceiver#BlockReceiver}
>       // check if there is a disk error
>       IOException cause = DatanodeUtil.getCauseIfDiskError(ioe);
>       DataNode.LOG.warn("IOException in BlockReceiver constructor"
>           + (cause == null ? "" : ". Cause is "), cause);
>       if (cause != null) {
>         ioe = cause;
>         // Volume error check moved to FileIoProvider
>       }
> {code}
> The logger should print the file name in addition to the cause.



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