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From "Hairong Kuang (JIRA)" <j...@apache.org>
Subject [jira] Resolved: (HADOOP-7047) RPC client gets stuck
Date Mon, 22 Nov 2010 21:40:14 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-7047?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Hairong Kuang resolved HADOOP-7047.
-----------------------------------

    Resolution: Invalid

I just realized that this problem has already been fixed in the trunk. The fix is in Connection#run.
Good job, the Hadoop community!

> RPC client gets stuck
> ---------------------
>
>                 Key: HADOOP-7047
>                 URL: https://issues.apache.org/jira/browse/HADOOP-7047
>             Project: Hadoop Common
>          Issue Type: Bug
>          Components: ipc
>            Reporter: Hairong Kuang
>            Assignee: Hairong Kuang
>             Fix For: 0.22.0
>
>         Attachments: trunkStuckClient.patch
>
>
> One of the dfs clients in our cluster stuck on waiting for a RPC result. However the
IPC connection thread who is receiving the RPC result died on OOM error:
> INFO >> Exception in thread "IPC Client (47) connection to XX from root" java.lang.OutOfMemoryError:
Java heap space
> INFO >> at java.util.Arrays.copyOfRange(Arrays.java:3209)
> INFO >> at java.lang.String.<init>(String.java:216)
> INFO >> at java.lang.StringBuffer.toString(StringBuffer.java:585)
> INFO >> at java.net.URI.toString(URI.java:1907)
> INFO >> at java.net.URI.<init>(URI.java:732)
> INFO >> at org.apache.hadoop.fs.Path.initialize(Path.java:137)
> INFO >> at org.apache.hadoop.fs.Path.<init>(Path.java:126)
> INFO >> at org.apache.hadoop.fs.FileStatus.readFields(FileStatus.java:206)
> INFO >> at org.apache.hadoop.io.ObjectWritable.readObject(ObjectWritable.java:237)
> INFO >> at org.apache.hadoop.io.ObjectWritable.readObject(ObjectWritable.java:171)
> INFO >> at org.apache.hadoop.io.ObjectWritable.readObject(ObjectWritable.java:219)
> INFO >> at org.apache.hadoop.io.ObjectWritable.readFields(ObjectWritable.java:66)
> INFO >> at org.apache.hadoop.ipc.Client$Connection.receiveResponse(Client.java:531)
> INFO >> at org.apache.hadoop.ipc.Client$Connection.run(Client.java:466)

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