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From Yonik Seeley <yo...@lucidimagination.com>
Subject Re: Solr Hanging
Date Thu, 19 Apr 2012 12:36:15 GMT
On Thu, Apr 19, 2012 at 4:25 AM, "Trym R. Møller" <trym@sigmat.dk> wrote:
> Hi
>
> I am using Solr trunk and have 7 Solr instances running with 28 leaders and
> 28 replicas for a single collection.
> After indexing a while (a couple of days) the solrs start hanging and doing
> a thread dump on the jvm I see blocked threads like the following:
>    Thread 2369: (state = BLOCKED)
>     - sun.misc.Unsafe.park(boolean, long) @bci=0 (Compiled frame;
> information may be imprecise)
>     - java.util.concurrent.locks.LockSupport.park(java.lang.Object) @bci=14,
> line=158 (Compiled frame)
>     -
> java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await()
> @bci=42, line=1987 (Compiled frame)
>     - java.util.concurrent.LinkedBlockingQueue.take() @bci=29, line=399
> (Compiled frame)
>     - java.util.concurrent.ExecutorCompletionService.take() @bci=4, line=164
> (Compiled frame)
>     - org.apache.solr.update.SolrCmdDistributor.checkResponses(boolean)
> @bci=27, line=350 (Compiled frame)
>     - org.apache.solr.update.SolrCmdDistributor.finish() @bci=18, line=98
> (Compiled frame)
>     - org.apache.solr.update.processor.DistributedUpdateProcessor.doFinish()
> @bci=4, line=299 (Compiled frame)
>     - org.apache.solr.update.processor.DistributedUpdateProcessor.finish()
> @bci=1, line=817 (Compiled frame)
>    ...
>     - org.mortbay.thread.QueuedThreadPool$PoolThread.run() @bci=25, line=582
> (Interpreted frame)
>
> I read the stack trace as my indexing client has indexed a document and this
> Solr is now waiting for the replica? to respond before returning an answer
> to the client.

Correct.  What's the full stack trace like on both a leader and replica?
We need to know what the replica is blocking on.

What version of trunk are you using?

-Yonik
lucenerevolution.com - Lucene/Solr Open Source Search Conference.
Boston May 7-10

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