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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (NUTCH-1352) Improve regex urlfilters/normalizers synchronization
Date Fri, 15 Jun 2012 17:54:43 GMT

    [ https://issues.apache.org/jira/browse/NUTCH-1352?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13295801#comment-13295801
] 

Hudson commented on NUTCH-1352:
-------------------------------

Integrated in Nutch-trunk #1869 (See [https://builds.apache.org/job/Nutch-trunk/1869/])
    NUTCH-1352 Improve regex urlfilters/normalizers synchronization (Revision 1349227)

     Result = SUCCESS
markus : http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1349227
Files : 
* /nutch/trunk/CHANGES.txt
* /nutch/trunk/src/plugin/lib-regex-filter/src/java/org/apache/nutch/urlfilter/api/RegexRule.java
* /nutch/trunk/src/plugin/lib-regex-filter/src/java/org/apache/nutch/urlfilter/api/RegexURLFilterBase.java
* /nutch/trunk/src/plugin/urlfilter-regex/src/java/org/apache/nutch/urlfilter/regex/RegexURLFilter.java
* /nutch/trunk/src/plugin/urlnormalizer-basic/src/java/org/apache/nutch/net/urlnormalizer/basic/BasicURLNormalizer.java
* /nutch/trunk/src/plugin/urlnormalizer-regex/src/java/org/apache/nutch/net/urlnormalizer/regex/RegexURLNormalizer.java

                
> 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, 1.6
>
>         Attachments: NUTCH-1352-1.6-1.patch, NUTCH-1352.patch
>
>
> 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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