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https://issues.apache.org/jira/browse/MAPREDUCE-2980?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13120298#comment-13120298
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Matt Foley commented on MAPREDUCE-2980:
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Should we instead be looking at upgrading to Jetty 7.x? It doesn't look like
the Jetty dev community is supporting 6.x in any significant way any more, see
for example
[JETTY-1374 Hadoop's TaskTracker OOM after upgrade to
jetty6|http://jira.codehaus.org/browse/JETTY-1374?focusedCommentId=271808&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-271808]
> Fetch failures and other related issues in Jetty 6.1.26
> -------------------------------------------------------
>
> Key: MAPREDUCE-2980
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-2980
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> Components: tasktracker
> Affects Versions: 0.20.205.0, 0.23.0
> Reporter: Todd Lipcon
> Priority: Critical
>
> Since upgrading Jetty from 6.1.14 to 6.1.26 we've had a ton of HTTP-related
> issues, including:
> - Much higher incidence of fetch failures
> - A few strange file-descriptor related bugs (eg MAPREDUCE-2389)
> - A few unexplained issues where long "fsck"s on the NameNode drop out
> halfway through with a ClosedChannelException
> Stress tests with 10000Map x 10000Reduce sleep jobs reliably reproduce fetch
> failures at a rate of about 1 per million on a 25 node test cluster. These
> problems are all new since the upgrade from 6.1.14.
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