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  1. Hadoop HDFS
  2. HDFS-5657

race condition causes writeback state error in NFS gateway

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    Details

    • Type: Bug
    • Status: Closed
    • Priority: Major
    • Resolution: Fixed
    • Affects Version/s: None
    • Fix Version/s: 2.3.0
    • Component/s: nfs
    • Labels:
      None
    • Hadoop Flags:
      Reviewed

      Description

      A race condition between NFS gateway writeback executor thread and new write handler thread can cause writeback state check failure, e.g.,

      2013-11-26 10:34:07,859 DEBUG nfs3.RpcProgramNfs3 (Nfs3Utils.java:writeChannel(113)) - WRITE_RPC_CALL_END______957880843
      2013-11-26 10:34:07,863 DEBUG nfs3.OpenFileCtx (OpenFileCtx.java:offerNextToWrite(832)) - The asyn write task has no pending writes, fileId: 30938
      2013-11-26 10:34:07,871 ERROR nfs3.AsyncDataService (AsyncDataService.java:run(136)) - Asyn data service got error:java.lang.IllegalStateException: The openFileCtx has false async status
              at com.google.common.base.Preconditions.checkState(Preconditions.java:145)
              at org.apache.hadoop.hdfs.nfs.nfs3.OpenFileCtx.executeWriteBack(OpenFileCtx.java:890)
              at org.apache.hadoop.hdfs.nfs.nfs3.AsyncDataService$WriteBackTask.run(AsyncDataService.java:134)
              at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
              at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
              at java.lang.Thread.run(Thread.java:662)
      
      2013-11-26 10:34:07,901 DEBUG nfs3.RpcProgramNfs3 (RpcProgramNfs3.java:write(707)) - requesed offset=917504 and current filesize=917504
      2013-11-26 10:34:07,902 DEBUG nfs3.WriteManager (WriteManager.java:handleWrite(131)) - handleWrite fileId: 30938 offset: 917504 length:65536 stableHow:0
      

        Attachments

        1. HDFS-5657.001.patch
          9 kB
          Brandon Li
        2. HDFS-5657.002.patch
          12 kB
          Brandon Li
        3. HDFS-5657.new.001.patch
          3 kB
          Brandon Li
        4. HDFS-5657.new.002.patch
          3 kB
          Brandon Li

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            People

            • Assignee:
              brandonli Brandon Li
              Reporter:
              brandonli Brandon Li
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              Dates

              • Created:
                Updated:
                Resolved: