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https://issues.apache.org/jira/browse/HDFS-167?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Bill Zeller updated HDFS-167:
-----------------------------
Release Note: Fixes logical error in
DFSClient::DFSOutputStream::DataStreamer::locateFollowingBlock that caused
infinite retries on write. Modified DFSClient constructor to allow unit testing
of locateFollowingBlock and added unit tests.
Status: Patch Available (was: Open)
> DFSClient continues to retry indefinitely
> -----------------------------------------
>
> Key: HDFS-167
> URL: https://issues.apache.org/jira/browse/HDFS-167
> Project: Hadoop HDFS
> Issue Type: Bug
> Reporter: Derek Wollenstein
> Assignee: Bill Zeller
> Priority: Minor
> Attachments: hdfs-167-4.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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