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Posted to dev@nutch.apache.org by "Talat UYARER (JIRA)" <ji...@apache.org> on 2013/07/25 11:01:59 UTC
[jira] [Updated] (NUTCH-1618) Fetches some websites multiple times
for long lasting queues
[ https://issues.apache.org/jira/browse/NUTCH-1618?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Talat UYARER updated NUTCH-1618:
--------------------------------
Description: 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 (was: 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)
> 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: 2.1, 2.2, 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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