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From Yonik Seeley <yo...@lucidimagination.com>
Subject Re: Deadlock in Server?
Date Fri, 20 Aug 2010 19:39:37 GMT
This sounds like perhaps a major merge was triggered.

You could do a nightly optimize - which will take just as long, but
you control when it happens.
The other option is to prevent too big of segments being greated (at
the expense of search speed) with options such as maxMergeDocs.

-Yonik
http://www.lucidimagination.com

On Fri, Aug 20, 2010 at 2:03 PM, Devin Foley <devinfoley@gmail.com> wrote:
> Hi All,
>
> I'm currently using Solr to run a search engine that is pulling in new data
> 24 hours a day.  Currently, I'm indexing about 5 million documents per day,
> each document being around 2k in size.  Every few days, the server locks up,
> and calls to /update stop working.  During this lock, CPU, memory and disk
> utilization on the server shoot up.  After 30-60 minutes, the server starts
> accepting updates again, without intervention on my part.  Also, during the
> lock, I am still able to /select.  I just can't /update.
>
> I viewed the thread dump in the admin panel during the last lockup, and
> found a lot of these:
>
> 'btpool0-868' Id=7582, WAITING on
> lock=java.util.concurrent.locks.ReentrantReadWriteLock$NonfairSync@6648711e,
> total cpu time=0.0000ms user time=0.0000ms
> ... (java.util stuff)
> org.apache.solr.update.DirectUpdateHandler2.addDoc(DirectUpdateHandler2.java:211)
>
> I'm using Solr 1.4.0, SolrJ 1.4.1 (StreamingUpdateSolrServer), and Java
> 1.6.0 64bit on CentOS.
>
> My questions...
>
> 1) Has anybody else experienced this?
> 2) Has this been addressed in Solr 1.4.0?
> 3) How can I stop this from happening?
>
> Thanks!
> Devin
>

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