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https://issues.apache.org/jira/browse/HDFS-5657?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Brandon Li updated HDFS-5657:
-----------------------------
Resolution: Fixed
Hadoop Flags: Reviewed
Status: Resolved (was: Patch Available)
> race condition causes writeback state error in NFS gateway
> ----------------------------------------------------------
>
> Key: HDFS-5657
> URL: https://issues.apache.org/jira/browse/HDFS-5657
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: nfs
> Reporter: Brandon Li
> Assignee: Brandon Li
> Attachments: HDFS-5657.001.patch, HDFS-5657.002.patch,
> HDFS-5657.new.001.patch, HDFS-5657.new.002.patch
>
>
> A race condition between NFS gateway writeback executor thread and new write
> handler thread can cause writeback state check failure, e.g.,
> {noformat}
> 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
> {noformat}
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