Ferdy Galema created NUTCH-1352:
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Summary: Improve regex urlfilters/normalizers synchronization
Key: NUTCH-1352
URL: https://issues.apache.org/jira/browse/NUTCH-1352
Project: Nutch
Issue Type: Improvement
Reporter: Ferdy Galema
Fix For: nutchgora
I noticed that during fetching a lot of the time the fetcherthreads are
blocking on a monitor because of outlink normalizing/filtering. The cause of
this: Some of the regex plugins use single lock synchronization.
This patch improves throughput by removing synchronization locks and replace
them with threadlocals were needed.
It has been extensively tested in production. I will commit this later today
when no objection.
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