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Date: Wed, 31 Mar 2010 22:02:27 +0000 (UTC)
From: "Tsz Wo (Nicholas), SZE (JIRA)" <jira@apache.org>
To: hdfs-issues@hadoop.apache.org
Subject: [jira] Commented: (HDFS-1072) TestReadWhileWriting may fail
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    [ https://issues.apache.org/jira/browse/HDFS-1072?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12852130#action_12852130 ] 

Tsz Wo (Nicholas), SZE commented on HDFS-1072:
----------------------------------------------

Here is the stack trace.
{noformat}
org.apache.hadoop.ipc.RemoteException: org.apache.hadoop.hdfs.protocol.AlreadyBeingCreatedException:
 failed to create file /TestReadWhileWriting/file1 for DFSClient_-1436751315 on client 127.0.0.1,
 because this file is already being created by HDFS_NameNode on 127.0.0.1
	at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.startFileInternal(FSNamesystem.java:1210)
	at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.appendFile(FSNamesystem.java:1305)
	at org.apache.hadoop.hdfs.server.namenode.NameNode.append(NameNode.java:636)
	at org.apache.hadoop.ipc.WritableRpcEngine$Server.call(WritableRpcEngine.java:342)
	at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:1253)
	at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:1249)
	at java.security.AccessController.doPrivileged(Native Method)
	at javax.security.auth.Subject.doAs(Subject.java:396)
	at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:706)
	at org.apache.hadoop.ipc.Server$Handler.run(Server.java:1247)

	at org.apache.hadoop.ipc.Client.call(Client.java:895)
	at org.apache.hadoop.ipc.WritableRpcEngine$Invoker.invoke(WritableRpcEngine.java:198)
	at $Proxy6.append(Unknown Source)
	at org.apache.hadoop.io.retry.RetryInvocationHandler.invokeMethod(RetryInvocationHandler.java:82)
	at org.apache.hadoop.io.retry.RetryInvocationHandler.invoke(RetryInvocationHandler.java:59)
	at $Proxy6.append(Unknown Source)
	at org.apache.hadoop.hdfs.DFSClient.append(DFSClient.java:701)
	at org.apache.hadoop.hdfs.DistributedFileSystem.append(DistributedFileSystem.java:212)
	at org.apache.hadoop.fs.FileSystem.append(FileSystem.java:793)
	at org.apache.hadoop.hdfs.TestReadWhileWriting.append(TestReadWhileWriting.java:111)
	at org.apache.hadoop.hdfs.TestReadWhileWriting.pipeline_02_03(TestReadWhileWriting.java:95)
{noformat}

> TestReadWhileWriting may fail
> -----------------------------
>
>                 Key: HDFS-1072
>                 URL: https://issues.apache.org/jira/browse/HDFS-1072
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: test
>            Reporter: Tsz Wo (Nicholas), SZE
>            Assignee: Tsz Wo (Nicholas), SZE
>
> If the lease recovery is taking a long time, TestReadWhileWriting may fail by AlreadyBeingCreatedException.

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