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https://issues.apache.org/jira/browse/MAPREDUCE-2529?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Chris Douglas updated MAPREDUCE-2529:
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Attachment: M2529-1.patch
M2529-1-20s.patch
Minor nits:
* As a default, always incrementing the metric for undefined regex probably
makes more sense
* {{null}} is probably a better default than the empty string
* There's a possible NPE if the exception message is {{null}}
* The unit test is setting combinations of the stack/message regex, but it
calls {{checkStackException}} in a few places, which doesn't exercise that
logic (I think it's covered, but that could be clearer)
* While this will be useful while we work around bugs emerging from Jetty, we
should probably keep it as an undocumented config setting.
* The trunk patch updates {{MRJobConfig}}, which is for user jobs. Moved to
{{JTConfig}}
This slight modification defines exceptions with {{null}} messages as matching
no regexp. Let me know if it looks OK to you
> Recognize Jetty bug 1342 and handle it
> --------------------------------------
>
> Key: MAPREDUCE-2529
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-2529
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> Components: tasktracker
> Affects Versions: 0.20.204.0, 0.23.0
> Reporter: Thomas Graves
> Assignee: Thomas Graves
> Fix For: 0.20.205.0, 0.23.0
>
> Attachments: M2529-1-20s.patch, M2529-1.patch,
> jetty1342-20security.patch, mapred2529-trunk.patch
>
>
> We are seeing many instances of the Jetty-1342
> (http://jira.codehaus.org/browse/JETTY-1342). The bug doesn't cause Jetty to
> stop responding altogether, some fetches go through but a lot of them throw
> exceptions and eventually fail. The only way we have found to get the TT out
> of this state is to restart the TT. This jira is to catch this particular
> exception (or perhaps a configurable regex) and handle it in an automated way
> to either blacklist or shutdown the TT after seeing it a configurable number
> of them.
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