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Posted to mapreduce-dev@hadoop.apache.org by "Todd Lipcon (JIRA)" <ji...@apache.org> on 2011/09/10 01:43:08 UTC

[jira] [Created] (MAPREDUCE-2980) Fetch failures and other related issues in Jetty 6.1.26

Fetch failures and other related issues in Jetty 6.1.26
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                 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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