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From Otis Gospodnetic <>
Subject Re: 99.9% uptime requirement
Date Sat, 01 Aug 2009 06:37:22 GMT

Solr is indeed very stable.  However, it can crash and I've seen it crash.  Or rather, I should
say I've seen the JVM that runs Solr crash.  For instance, if you have a servlet container
with a number of webapps, one of which is Solr, and one of which has a memory leak, I believe
all webapps will suffer and "crash".  And even if you have just Solr in your servlet container,
it can OOM, say if you specify overly large caches or too frequent commits, etc.

Sematext is hiring --
Lucene, Solr, Nutch, Katta, Hadoop, HBase, UIMA, NLP, NER, IR

----- Original Message ----
> From: Robert Petersen <>
> To:
> Sent: Friday, July 31, 2009 12:18:55 PM
> Subject: 99.9% uptime requirement
> Hi all,
> My solr project powers almost all the pages in our site and so needs to
> be up period.  My question is what can I do to ensure that happens?
> Does solr ever crash, assuming reasonable load conditions and no extreme
> index sizes?
> I saw some comments about running solr under daemontools in order to get
> an auto-restart on crashes.  From what I have seen so far in my limited
> experience, solr is very stable and never crashes (so far).  Does anyone
> else have this requirement and if so how do they deal with it?  Is
> anyone else running solr under daemontools in a production site?
> Thanks for any input you might have,
> Robi

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