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From "Wei-Chiu Chuang (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HDFS-12293) DataNode should log file name on disk error
Date Fri, 11 Aug 2017 16:10:00 GMT
Wei-Chiu Chuang created HDFS-12293:
--------------------------------------

             Summary: 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


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 its log 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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