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Posted to dev@nutch.apache.org by "Julien Nioche (JIRA)" <ji...@apache.org> on 2015/12/01 12:43:10 UTC
[jira] [Comment Edited] (NUTCH-2177) Generator produces only one
partition even in distributed mode
[ https://issues.apache.org/jira/browse/NUTCH-2177?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15033491#comment-15033491 ]
Julien Nioche edited comment on NUTCH-2177 at 12/1/15 11:43 AM:
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Do you mean 'mapreduce.framework.name' ?
Should work indeed - here are the values I am getting on EMR
15/12/01 11:02:00 INFO crawl.Generator: mapred.job.tracker local
15/12/01 11:02:00 INFO crawl.Generator: mapreduce.jobtracker.address local
15/12/01 11:02:00 INFO crawl.Generator: mapreduce.framework.name yarn
where in local mode I get
2015-12-01 11:42:16,622 INFO crawl.Generator - mapred.job.tracker local
2015-12-01 11:42:16,622 INFO crawl.Generator - mapreduce.jobtracker.address local
2015-12-01 11:42:16,622 INFO crawl.Generator - mapreduce.framework.name local
Will send a patch shortly
was (Author: jnioche):
Do you mean 'mapreduce.framework.name' ?
> Generator produces only one partition even in distributed mode
> --------------------------------------------------------------
>
> Key: NUTCH-2177
> URL: https://issues.apache.org/jira/browse/NUTCH-2177
> Project: Nutch
> Issue Type: Bug
> Components: generator
> Reporter: Julien Nioche
> Priority: Blocker
> Fix For: 1.11
>
>
> See [https://github.com/apache/nutch/blob/trunk/src/java/org/apache/nutch/crawl/Generator.java#L542]
> 'mapred.job.tracker' is deprecated and has been replaced by 'mapreduce.jobtracker.address', however when running Nutch on EMR mapreduce.jobtracker.address has local as a value. As a result we generate a single partition i.e. have a single map fetching later on (which defeats the object of having a distributed crawler).
> We should probably detect whether we are running on YARN instead, see [http://stackoverflow.com/questions/29680155/why-there-is-a-mapreduce-jobtracker-address-configuration-on-yarn]
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