Greg Padiasek created NUTCH-1746:
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Summary: OutOfMemory Error in Mappers
Key: NUTCH-1746
URL: https://issues.apache.org/jira/browse/NUTCH-1746
Project: Nutch
Issue Type: Bug
Components: generator, injector
Affects Versions: 1.7
Environment: Nutch running in local mode with 4M+ domains in
domain-urlfilter.txt
Reporter: Greg Padiasek
Initially I found that Generator was throwing OutOfMemoryError exception no
matter how much RAM I allocated to JVM. I fixed the problem by moving
URLFilters, URLNormalizers and ScoringFilters to top-level class as singletons
and re-using them in all Generator mapper instances.
Then I found that same problem in Injector and applied analogical fix.
Now it seems that this problem may be common in all Nutch Mapper
implementations.
I was wondering if it would it be possible to integrate this kind of change
in the upstream code base and potentially update all vulnerable Mapper classes.
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