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From Gregg Donovan <gregg...@gmail.com>
Subject Re: How To Interrupt Solr Query Execution
Date Fri, 20 Mar 2015 18:16:38 GMT
SOLR-5986 looks like a great enhancement for enforcing timeouts. I'm
curious about how to handle *manual* cancellation.

We're working on backup requests -- e.g. wait till 90% of shards have
responded then send out a backup request for the lagging (e.g. GC, cache
miss, overloaded, etc.) shards after a configurable delay -- and would like
to be able to cancel the slower to respond shard. From what I can see in
SOLR-5986, I'm not sure that Solr will check the interrupt status of a
thread if it is manually interrupted. Am I reading that right? If so, would
it make sense to add a check for the interrupt status in
SolrQueryTimeoutImpl#shouldExit()[1]?


[1]
https://github.com/apache/lucene-solr/blob/trunk/solr/core/src/java/org/apache/solr/search/SolrQueryTimeoutImpl.java#L57:L63

On Fri, Dec 19, 2014 at 10:15 AM, Shalin Shekhar Mangar <
shalinmangar@gmail.com> wrote:

> Also note SOLR-5986 which will help in such cases when queries are stuck
> iterating through terms. This will be released with Solr 5.0
>
> On Fri, Dec 19, 2014 at 9:14 AM, Mikhail Khludnev <
> mkhludnev@griddynamics.com> wrote:
> >
> > Hello,
> > Note, that timeout is checked only during the search. But for example, it
> > isn't checked during facet counting. Check debugQuery=true output, to
> > understand how the processing time is distributed across components.
> >
> > On Fri, Dec 19, 2014 at 12:05 PM, Vishnu Mishra <vdilipm@gmail.com>
> wrote:
> > >
> > > Hi, I am using solr 4.9 for searching  over 90 million+ documents. My
> > Solr
> > > is
> > > running on tomcat server and  I am  querying Solr from an application.
> I
> > > have a problem with long-running queries against Solr. Although I have
> > set
> > > timeAllowed to 40000ms, but it seems that solr still running this query
> > > until it processed fully. I read some articles where it is written that
> > >
> > > "*Internally, Solr does nothing to time out any requests -- it lets
> both
> > > updates and queries take however long they need to take to be processed
> > > fully.*"
> > >
> > > Is this what Solr does? If so, is there a configuration option to
> change
> > > this behavior? or can I interrupt solr query execution.
> > >
> > >
> > >
> > > --
> > > View this message in context:
> > >
> >
> http://lucene.472066.n3.nabble.com/How-To-Interrupt-Solr-Query-Execution-tp4175190.html
> > > Sent from the Solr - User mailing list archive at Nabble.com.
> > >
> >
> >
> > --
> > Sincerely yours
> > Mikhail Khludnev
> > Principal Engineer,
> > Grid Dynamics
> >
> > <http://www.griddynamics.com>
> > <mkhludnev@griddynamics.com>
> >
>
>
> --
> Regards,
> Shalin Shekhar Mangar.
>

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