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From "Raghu Angadi (JIRA)" <j...@apache.org>
Subject [jira] Resolved: (HADOOP-1949) NPE in IPC handler.
Date Wed, 13 Feb 2008 23:23:08 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-1949?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Raghu Angadi resolved HADOOP-1949.
----------------------------------

    Resolution: Won't Fix

SocketChannelOutputStream is no longer used in IPC.

> NPE in IPC handler.
> -------------------
>
>                 Key: HADOOP-1949
>                 URL: https://issues.apache.org/jira/browse/HADOOP-1949
>             Project: Hadoop Core
>          Issue Type: Bug
>          Components: ipc
>    Affects Versions: 0.14.1
>            Reporter: Raghu Angadi
>
> Noticed a few of the following traces during upgrade of a large cluster to 0.14.1 :
> {noformat}
> 2007-09-26 17:21:40,134 WARN org.apache.hadoop.ipc.Server: IPC Server handler 20 on 8020,
call 
> processUpgradeCommand(org.apache.hadoop.dfs.BlockCrcUpgradeUtils$CrcInfoCommand@2b9c5c9d)

> from 192.0.0.100:40500: output error
> java.lang.NullPointerException
>         at org.apache.hadoop.ipc.SocketChannelOutputStream.flushBuffer(SocketChannelOutputStream.java:108)
>         at org.apache.hadoop.ipc.SocketChannelOutputStream.write(SocketChannelOutputStream.java:89)
>         at java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:65)
>         at java.io.BufferedOutputStream.flush(BufferedOutputStream.java:123)
>         at java.io.DataOutputStream.flush(DataOutputStream.java:106)
>         at org.apache.hadoop.ipc.Server$Handler.run(Server.java:585)
> {noformat}

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