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Posted to dev@nutch.apache.org by "Talat UYARER (JIRA)" <ji...@apache.org> on 2013/07/25 10:59:53 UTC

[jira] [Created] (NUTCH-1618) Fetches some websites multiple times for long lasting queues

Talat UYARER created NUTCH-1618:
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             Summary: Fetches some websites multiple times for long lasting queues
                 Key: NUTCH-1618
                 URL: https://issues.apache.org/jira/browse/NUTCH-1618
             Project: Nutch
          Issue Type: Bug
          Components: fetcher
    Affects Versions: 2.2, 2.1, 2.3, 2.4
            Reporter: Talat UYARER
            Priority: Minor
             Fix For: 2.1


We are using nutch for high volume crawls. We noticed that FetcherJob
ReduceTask fetches some websites multiple times for long lasting queues. I
have discovered the reason of this is mapred.reduce.tasks.speculative.execution
settings in hadoop. 1.x has speculative execution turned off. I create a patch for 2.x

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