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https://issues.apache.org/jira/browse/NUTCH-925?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Markus Jelsma updated NUTCH-925:
--------------------------------
Fix Version/s: 1.4
This has been fixed for 2.0 in NUTCH-844 but not in 1.x.
> plugins stored in weakhashmap lead memory leak
> ----------------------------------------------
>
> Key: NUTCH-925
> URL: https://issues.apache.org/jira/browse/NUTCH-925
> Project: Nutch
> Issue Type: Bug
> Affects Versions: 1.2
> Reporter: congliu
> Fix For: 1.4
>
>
> I suffer serious memory leak using Nutch 1.2 though a very deep crawl. I get
> the error like this:
> Exception in thread "Thread-113544" java.lang.OutOfMemoryError: PermGen space
> at java.lang.Throwable.getStackTraceElement(Native Method)
> at java.lang.Throwable.getOurStackTrace(Throwable.java:591)
> at java.lang.Throwable.printStackTrace(Throwable.java:510)
> at
> org.apache.log4j.spi.ThrowableInformation.getThrowableStrRep(ThrowableInformation.java:76)
> at
> org.apache.log4j.spi.LoggingEvent.getThrowableStrRep(LoggingEvent.java:407)
> at org.apache.log4j.WriterAppender.subAppend(WriterAppender.java:305)
> at
> org.apache.log4j.DailyRollingFileAppender.subAppend(DailyRollingFileAppender.java:359)
> at org.apache.log4j.WriterAppender.append(WriterAppender.java:160)
> at org.apache.log4j.AppenderSkeleton.doAppend(AppenderSkeleton.java:251)
> at
> org.apache.log4j.helpers.AppenderAttachableImpl.appendLoopOnAppenders(AppenderAttachableImpl.java:66)
> at org.apache.log4j.Category.callAppenders(Category.java:206)
> at org.apache.log4j.Category.forcedLog(Category.java:391)
> at org.apache.log4j.Category.log(Category.java:856)
> at org.slf4j.impl.Log4jLoggerAdapter.log(Log4jLoggerAdapter.java:509)
> at
> org.apache.commons.logging.impl.SLF4JLocationAwareLog.warn(SLF4JLocationAwareLog.java:173)
> at
> org.apache.hadoop.mapred.LocalJobRunner$Job.run(LocalJobRunner.java:256)
> Exception in thread "main" java.io.IOException: Job failed!
> at org.apache.hadoop.mapred.JobClient.runJob(JobClient.java:1252)
> at org.apache.nutch.fetcher.Fetcher.fetch(Fetcher.java:1107)
> at org.apache.nutch.crawl.Crawl.main(Crawl.java:133)
> I guess Plugin repository cache lead to memory leak.
> As u know plugins is stored in weakhashmap <conf, plugins>, and new class
> classload
> create when u need plugins.
> Usually,WeakHashMap object can been gc, but class and classload is stored in
> Perm NOT stack and gc can't perform in Perm, SO (java.lang.OutOfMemoryError:
> PermGen space) occured..., is any nutch-issues have concerned this promble?
> or there is any solution?
> nutch-356 may help?
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