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From Ronald Wood <>
Subject Re: Distributed queries hang in a non-SolrCloud environment, Solr 4.10.4
Date Mon, 06 Jul 2015 12:30:58 GMT
Thank you! I will look into that and give it a try.

I also am going to look at the cache overall and try to tune it for the faceting we’re doing.

Ronald S. Wood | Senior Software Developer
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On 7/3/15, 1:42 AM, "Shalin Shekhar Mangar" <> wrote:

>On Fri, Jul 3, 2015 at 1:06 AM, Ronald Wood <> wrote:
>> I had initially suspect that distributed searches combined with faceting might be
part of the issue, since I had seen some long-running threads that seemed to spend a long
time in the FastLRUCache when getting facets for a single field. However, in the latest case
of blocked queries, I am not seeing that.
>That happens because by default the FastLRUCache will steal the
>request thread to perform clean up when the number of items exceed a
>certain limit. You can avoid this by using cleanupThread="true" as an
>attribute in the cache's configuration. That will spawn a new thread
>to clean up if and when required so that request threads aren't
>blocked for a long time.
>> We have two slaves that replicate from a master, and we were saw the issue recur
after a while of client usage, ruling out a hardware issue.
>> Does anyone have any suggestions for potential avenues of attack for getting to the
bottom of this? Or are there any known issues that could be implicated in this?
>> - Ronald S. Wood
>Shalin Shekhar Mangar.
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