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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-1093) NNBench generates millions of NotReplicatedYetException in Namenode log
Date Wed, 20 Jun 2007 01:04:26 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-1093?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12506349
] 

Hadoop QA commented on HADOOP-1093:
-----------------------------------

-1, could not apply patch.

The patch command could not apply the latest attachment http://issues.apache.org/jira/secure/attachment/12355372/nyr5.patch
as a patch to trunk revision r548794.

Console output: http://lucene.zones.apache.org:8080/hudson/job/Hadoop-Patch/309/console

Please note that this message is automatically generated and may represent a problem with
the automation system and not the patch.

> NNBench generates millions of NotReplicatedYetException in Namenode log
> -----------------------------------------------------------------------
>
>                 Key: HADOOP-1093
>                 URL: https://issues.apache.org/jira/browse/HADOOP-1093
>             Project: Hadoop
>          Issue Type: Bug
>          Components: dfs
>    Affects Versions: 0.12.0
>            Reporter: Nigel Daley
>            Assignee: dhruba borthakur
>             Fix For: 0.13.0
>
>         Attachments: nyr5.patch
>
>
> Running NNBench on latest trunk (0.12.1 candidate) on a few hundred nodes yielded 2.3
million of these exceptions in the NN log:
>    2007-03-08 09:23:03,053 INFO org.apache.hadoop.ipc.Server: IPC Server handler 0 on
8020 call error:
>    org.apache.hadoop.dfs.NotReplicatedYetException: Not replicated yet
>         at org.apache.hadoop.dfs.FSNamesystem.getAdditionalBlock(FSNamesystem.java:803)
>         at org.apache.hadoop.dfs.NameNode.addBlock(NameNode.java:309)
>         at sun.reflect.GeneratedMethodAccessor14.invoke(Unknown Source)
>         at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
>         at java.lang.reflect.Method.invoke(Method.java:597)
>         at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:336)
>         at org.apache.hadoop.ipc.Server$Handler.run(Server.java:559)
> I run NNBench to create files with block size set to 1 and replication set to 1.  NNBench
then writes 1 byte to the file.  Minimum replication for the cluster is the default, ie 1.
 If it encounters an exception while trying to do either the create or write operations, it
loops and tries again.  Multiply this by 1000 files per node and a few hundred nodes.

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