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From "Bill Zeller (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HDFS-167) DFSClient continues to retry indefinitely
Date Sat, 01 Aug 2009 03:08:15 GMT

     [ https://issues.apache.org/jira/browse/HDFS-167?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Bill Zeller updated HDFS-167:
-----------------------------

    Attachment: hdfs-167-for-20-1.patch

hdfs-167-for-20-1.patch is a patch for .20. 


Running test-patch:

     [exec] +1 overall.  
     [exec]     +1 @author.  The patch does not contain any @author tags.
     [exec]     +1 tests included.  The patch appears to include 3 new or modified tests.
     [exec]     +1 javadoc.  The javadoc tool did not generate any warning messages.
     [exec]     +1 javac.  The applied patch does not increase the total number of javac compiler
warnings.
     [exec]     +1 findbugs.  The patch does not introduce any new Findbugs warnings.
     [exec]     +1 Eclipse classpath. The patch retains Eclipse classpath integrity.
======================================================================
======================================================================
     [exec]     Finished build.
======================================================================
======================================================================

Running "ant test" passed all test except one (org.apache.hadoop.cli.TestCLI) which I believe
is a configuration error on my part (I get the same error when testing the trunk with no modifications).


> DFSClient continues to retry indefinitely
> -----------------------------------------
>
>                 Key: HDFS-167
>                 URL: https://issues.apache.org/jira/browse/HDFS-167
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: hdfs client
>            Reporter: Derek Wollenstein
>            Assignee: Bill Zeller
>            Priority: Minor
>             Fix For: 0.21.0
>
>         Attachments: hdfs-167-4.patch, hdfs-167-5.patch, hdfs-167-6.patch, hdfs-167-for-20-1.patch
>
>
> I encountered a bug when trying to upload data using the Hadoop DFS Client.  
> After receiving a NotReplicatedYetException, the DFSClient will normally retry its upload
up to some limited number of times.  In this case, I found that this retry loop continued
indefinitely, to the point that the number of tries remaining was negative:
> 2009-03-25 16:20:02 [INFO] 
> 2009-03-25 16:20:02 [INFO] 09/03/25 16:20:02 INFO hdfs.DFSClient: Waiting for replication
for 21 seconds
> 2009-03-25 16:20:03 [INFO] 09/03/25 16:20:02 WARN hdfs.DFSClient: NotReplicatedYetException
sleeping /apollo/env/SummaryMySQL/var/logstore/fiorello_logs_2009
> 0325_us/logs_20090325_us_13 retries left -1
> The stack trace for the failure that's retrying is:
> 2009-03-25 16:20:02 [INFO] 09/03/25 16:20:02 INFO hdfs.DFSClient: org.apache.hadoop.ipc.RemoteException:
org.apache.hadoop.hdfs.server.namenode.NotReplicated
> YetException: Not replicated yet:<filename>
> 2009-03-25 16:20:02 [INFO]      at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.getAdditionalBlock(FSNamesystem.java:1266)
> 2009-03-25 16:20:02 [INFO]      at org.apache.hadoop.hdfs.server.namenode.NameNode.addBlock(NameNode.java:351)
> 2009-03-25 16:20:02 [INFO]      at sun.reflect.GeneratedMethodAccessor19.invoke(Unknown
Source)
> 2009-03-25 16:20:02 [INFO]      at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
> 2009-03-25 16:20:02 [INFO]      at java.lang.reflect.Method.invoke(Method.java:597)
> 2009-03-25 16:20:02 [INFO]      at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:481)
> 2009-03-25 16:20:02 [INFO]      at org.apache.hadoop.ipc.Server$Handler.run(Server.java:894)
> 2009-03-25 16:20:02 [INFO] 
> 2009-03-25 16:20:02 [INFO]      at org.apache.hadoop.ipc.Client.call(Client.java:697)
> 2009-03-25 16:20:02 [INFO]      at org.apache.hadoop.ipc.RPC$Invoker.invoke(RPC.java:216)
> 2009-03-25 16:20:02 [INFO]      at $Proxy0.addBlock(Unknown Source)
> 2009-03-25 16:20:02 [INFO]      at sun.reflect.GeneratedMethodAccessor2.invoke(Unknown
Source)
> 2009-03-25 16:20:02 [INFO]      at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
> 2009-03-25 16:20:02 [INFO]      at java.lang.reflect.Method.invoke(Method.java:597)
> 2009-03-25 16:20:02 [INFO]      at org.apache.hadoop.io.retry.RetryInvocationHandler.invokeMethod(RetryInvocationHandler.java:82)
> 2009-03-25 16:20:02 [INFO]      at org.apache.hadoop.io.retry.RetryInvocationHandler.invoke(RetryInvocationHandler.java:59)
> 2009-03-25 16:20:02 [INFO]      at $Proxy0.addBlock(Unknown Source)
> 2009-03-25 16:20:02 [INFO]      at org.apache.hadoop.hdfs.DFSClient$DFSOutputStream.locateFollowingBlock(DFSClient.java:2814)
> 2009-03-25 16:20:02 [INFO]      at org.apache.hadoop.hdfs.DFSClient$DFSOutputStream.nextBlockOutputStream(DFSClient.java:2696)
> 2009-03-25 16:20:02 [INFO]      at org.apache.hadoop.hdfs.DFSClient$DFSOutputStream.access$2000(DFSClient.java:1996)
> 2009-03-25 16:20:02 [INFO]      at org.apache.hadoop.hdfs.DFSClient$DFSOutputStream$DataStreamer.run(DFSClient.java:2183)

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