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From "Todd Lipcon (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HADOOP-7121) Exceptions while serializing IPC call response are not handled well
Date Wed, 01 Jun 2011 00:40:47 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-7121?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Todd Lipcon updated HADOOP-7121:
--------------------------------

    Attachment: hadoop-7121.txt

Attached patch adds coverage to all parts of the IPC lifecycle:
- client side write param
- server side read param
- server side write response
- client side read response

In the cases that the error occurs server side, it sends back the exception to the client
as well as logging it.


> Exceptions while serializing IPC call response are not handled well
> -------------------------------------------------------------------
>
>                 Key: HADOOP-7121
>                 URL: https://issues.apache.org/jira/browse/HADOOP-7121
>             Project: Hadoop Common
>          Issue Type: Bug
>          Components: ipc
>    Affects Versions: 0.22.0
>            Reporter: Todd Lipcon
>            Assignee: Todd Lipcon
>            Priority: Critical
>              Labels: newbie
>             Fix For: 0.22.0
>
>         Attachments: hadoop-7121.txt
>
>
> We had a situation where for some reason the serialization of an RPC call's response
was throwing OOME. When this happens, the exception is not caught, and the call never gets
a response - the client just hangs. Additionally, the OOME propagated all the way to the top
of the IPC handler and caused the handler. Plus, the Handler upon exit only logged to stdout
and not to the log4j logs.

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