Julien Nioche created NUTCH-2177:
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Summary: 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'mapred.job.tracker' is deprecated and has been replaced by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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