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https://issues.apache.org/jira/browse/OFBIZ-1555?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12555013
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BJ Freeman commented on OFBIZ-1555:
-----------------------------------
There was some dialog in the mailing lists.
I believe Adrian will comment about the fix.
> Exception in thread "Dispatcher-Thread-0"
> java.util.ConcurrentModificationException
> -----------------------------------------------------------------------------------
>
> Key: OFBIZ-1555
> URL: https://issues.apache.org/jira/browse/OFBIZ-1555
> Project: OFBiz
> Issue Type: Bug
> Components: framework
> Environment: Linux - Ubuntu-Dapper 6.06 64bits, Java HotSpot(TM)
> 64-Bit Server VM (build 1.5.0_06-b05, mixed mode) (tried also with version
> 1.6), postgres 8.1
> Reporter: Gustavo Sardi
>
> we are customizing an ofbiz application from base version ofbiz-r536978, our
> changes are at the app level, we have not changed much of the framework.
> after several month of work we are in production now, as we are getting more
> users online (even not more than 5) we are having this exception randomly,
> the appserver stop responding and the only solution is to kill it by issuing
> a 'kill -9' as root at the server, the script stopobiz.sh does nothing.
> this error is most often seen when working with orders (stock reservation
> process and such) and generating PDF files for printing.
> we tried changing log4j lib version to 1.2.15
> we tried turning off logging with no result
> there was something about async and sync issues writing to the logs in
> log4j.xml but the version we have seams to have the sync mode of writing.
> we searched several forums and have not seen this issue anywhere, does anyone
> has any idea to share?
> thanks
> here is the last part of console.log
> 2007-12-30 12:22:11,680 (http-0.0.0.0-8443-Processor3)
> [StaticContentLayoutManager.java:246:WARN ] static-content overflows the
> available area. (fo:static-content, location: 17/13)
> 2007-12-30 12:22:11,724 (http-0.0.0.0-8443-Processor3) [
> TableLayoutManager.java:170:INFO ] table-layout="fixed" and width="auto", but
> auto-layout not supported => assuming width="100%"
> 2007-12-30 12:22:11,789 (http-0.0.0.0-8443-Processor3)
> [StaticContentLayoutManager.java:246:WARN ] static-content overflows the
> available area. (fo:static-content, location: 17/13)
> 2007-12-30 12:22:11,813 (http-0.0.0.0-8443-Processor3) [
> TableLayoutManager.java:170:INFO ] table-layout="fixed" and width="auto", but
> auto-layout not supported => assuming width="100%"
> 2007-12-30 12:22:11,854 (http-0.0.0.0-8443-Processor3)
> [StaticContentLayoutManager.java:246:WARN ] static-content overflows the
> available area. (fo:static-content, location: 17/13)
> Exception in thread "Dispatcher-Thread-0"
> java.util.ConcurrentModificationException
> at
> java.util.LinkedList$ListItr.checkForComodification(LinkedList.java:617)
> at java.util.LinkedList$ListItr.next(LinkedList.java:552)
> at java.util.AbstractCollection.toString(AbstractCollection.java:453)
> at org.apache.log4j.or.DefaultRenderer.doRender(DefaultRenderer.java:36)
> at org.apache.log4j.or.RendererMap.findAndRender(RendererMap.java:80)
> at
> org.apache.log4j.spi.LoggingEvent.getRenderedMessage(LoggingEvent.java:362)
> at
> org.apache.log4j.helpers.PatternParser$BasicPatternConverter.convert(PatternParser.java:403)
> at
> org.apache.log4j.helpers.PatternConverter.format(PatternConverter.java:65)
> at org.apache.log4j.PatternLayout.format(PatternLayout.java:502)
> at org.apache.log4j.WriterAppender.subAppend(WriterAppender.java:302)
> at org.apache.log4j.WriterAppender.append(WriterAppender.java:160)
> at org.apache.log4j.AppenderSkeleton.doAppend(AppenderSkeleton.java:251)
> at
> org.apache.log4j.helpers.AppenderAttachableImpl.appendLoopOnAppenders(AppenderAttachableImpl.java:66)
> at org.apache.log4j.AsyncAppender$Dispatcher.run(AsyncAppender.java:583)
> at java.lang.Thread.run(Thread.java:595)
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