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From "Noble Paul നോബിള്‍ नोब्ळ्" <>
Subject Re: Solr stops responding
Date Tue, 15 Jul 2008 15:39:35 GMT
Can we collect more information. It would be nice to know what the
threads are doing when it hangs.
If you are using *nix  issue kill -3 <pid>
it would print out the stacktrace of all the threads in the VM . That
may tell us what is the state of each thread which could help us
suggest something

On Tue, Jul 15, 2008 at 8:59 PM, Fuad Efendi <> wrote:
> I constantly have the same problem; sometimes I have OutOfMemoryError in
> logs, sometimes
> not. Not-predictable. I minimized all caches, it still happens even with
> 8192M. CPU usage
> is 375%-400% (two double-core Opterons), SUN Java 5. Moved to BEA JRockit 5
> yesterday,
> looks 30 times faster (25% CPU load with 4096M RAM); no any problem yet,
> let's see...
> Strange: Tomcat simply hangs instead of exit(...)
> There are some posts related to OutOfMemoryError in solr-user list.
> ==============
> Quoting Doug Steigerwald <>:
>> Since we pushed Solr out to production a few weeks ago, we've seen a
>> few issues with Solr not responding to requests (searches or admin
>> pages).  There doesn't seem to be any reason for it from what we can
>> tell.  We haven't seen it in QA or development.
>> We're running Solr with basically the example Solr setup with Jetty
>> (6.1.3).  We package our Solr install by using 'ant example' and
>> replacing configs/etc.  Whenever Solr stops responding, there are no
>> messages in the logs, nothing.  Requests just time out.
>> We have also only seen this on our slaves.  The master doesn't seem to
>> be hitting this issue.  All the boxes are the same, version of java is
>> the same, etc.
>> We don't have a stack trace and no JMX set up.  Once we see this issue,
>> our support folks just stop and start Solr on that machine.
>> Has anyone else run into anything like this with Solr?
>> Thanks.
>> Doug

--Noble Paul

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