Brandon Li created HDFS-5657:
--------------------------------
Summary: 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
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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