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Jim Walker commented on SOLR-5986: ---------------------------------- Steve, good point regarding automation. That should come first. I just talked to Anshum who has this covered; he will know what needs to happen here best. Cheers > Don't allow runaway queries from harming Solr cluster health or search > performance > ---------------------------------------------------------------------------------- > > Key: SOLR-5986 > URL: https://issues.apache.org/jira/browse/SOLR-5986 > Project: Solr > Issue Type: Improvement > Components: search > Reporter: Steve Davids > Priority: Critical > Fix For: 4.9 > > > The intent of this ticket is to have all distributed search requests stop > wasting CPU cycles on requests that have already timed out or are so > complicated that they won't be able to execute. We have come across a case > where a nasty wildcard query within a proximity clause was causing the > cluster to enumerate terms for hours even though the query timeout was set to > minutes. This caused a noticeable slowdown within the system which made us > restart the replicas that happened to service that one request, the worst > case scenario are users with a relatively low zk timeout value will have > nodes start dropping from the cluster due to long GC pauses. > [~amccurry] Built a mechanism into Apache Blur to help with the issue in > BLUR-142 (see commit comment for code, though look at the latest code on the > trunk for newer bug fixes). > Solr should be able to either prevent these problematic queries from running > by some heuristic (possibly estimated size of heap usage) or be able to > execute a thread interrupt on all query threads once the time threshold is > met. This issue mirrors what others have discussed on the mailing list: > http://mail-archives.apache.org/mod_mbox/lucene-solr-user/200903.mbox/%3c856ac15f0903272054q2dbdbd19kea3c5ba9e105b...@mail.gmail.com%3E -- This message was sent by Atlassian JIRA (v6.2#6252) --------------------------------------------------------------------- To unsubscribe, e-mail: dev-unsubscr...@lucene.apache.org For additional commands, e-mail: dev-h...@lucene.apache.org