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https://issues.apache.org/jira/browse/HADOOP-848?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Owen O'Malley resolved HADOOP-848.
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Resolution: Won't Fix
The randomwriter already turns off speculative execution in its JobConf. It
will only be a problem if the hadoop-site.xml overrides the setting. Therefore,
this is a configuration issue rather than a problem with random writer.
> randomwriter generates too many errors of type:
> org.apache.hadoop.dfs.AlreadyBeingCreatedException
> --------------------------------------------------------------------------------------------------
>
> Key: HADOOP-848
> URL: https://issues.apache.org/jira/browse/HADOOP-848
> Project: Hadoop
> Issue Type: Bug
> Components: examples
> Affects Versions: 0.9.2
> Reporter: Arun C Murthy
>
> randomwriter with speculative execution turned 'on' fails with too many
> errors:
> 2006-12-25 06:50:38,880 INFO org.apache.hadoop.mapred.TaskInProgress: Error
> from task_0002_m_002175_1: org.apache.hadoop.ipc.RemoteException:
> org.apache.hadoop.dfs.AlreadyBeingCreatedException: failed to create file
> /randomwriter/input/part000522 for DFSClient_task_0002_m_002101_1 on client
> XXX because pendingCreates is non-null.
> 2006-12-25 06:50:48,203 INFO org.apache.hadoop.mapred.TaskInProgress: Error
> from task_0002_m_002213_1: org.apache.hadoop.ipc.RemoteException:
> org.apache.hadoop.dfs.AlreadyBeingCreatedException: failed to create file
> /randomwriter/input/part000623 for DFSClient_task_0002_m_002213_1 on client
> XXX because pendingCreates is non-null.
> 2006-12-25 06:50:49,917 INFO org.apache.hadoop.mapred.TaskInProgress: Error
> from task_0002_m_002211_1: org.apache.hadoop.ipc.RemoteException:
> org.apache.hadoop.dfs.AlreadyBeingCreatedException: failed to create file
> /randomwriter/input/part000621 for DFSClient_task_0002_m_002211_1 on client
> XXX because pendingCreates is non-null.
> 2006-12-25 06:50:52,812 INFO org.apache.hadoop.mapred.TaskInProgress: Error
> from task_0002_m_002247_1: org.apache.hadoop.ipc.RemoteException:
> org.apache.hadoop.dfs.AlreadyBeingCreatedException: failed to create file
> /randomwriter/input/part000654 for DFSClient_task_0002_m_002247_1 on client
> XXX because pendingCreates is non-null.
> I suspect this is due to the the fact that randomwriter doesn't use the
> PhasedFileSystem.
> -*-*-
> Unrelated note: can we add the 'examples' *Component* to this project here on
> jira? I've put in 'mapred' for this issue for now, please feel free to
> correct me. Thanks!
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