[jira] [Created] (SOLR-9116) Race condition causing occasional SolrIndexSearcher leak when SolrCore is reloaded

["Jessica Cheng Mallet (JIRA)" <ji...@apache.org>]

Jessica Cheng Mallet created SOLR-9116:
------------------------------------------

             Summary: Race condition causing occasional SolrIndexSearcher leak when SolrCore is reloaded
                 Key: SOLR-9116
                 URL: https://issues.apache.org/jira/browse/SOLR-9116
             Project: Solr
          Issue Type: Bug
            Reporter: Jessica Cheng Mallet


Fix a leak of SolrIndexSearcher when a SolrCore is reloaded. Added a test to expose this leak when run in many iterations (pretty reliable failure with iters=1K), which passes with the fix (ran iters=10K twice).

The fundamental issue is that when an invocation of SolrCore#openNewSearcher is racing with SolrCore#close, if this synchronized block (https://github.com/apache/lucene-solr/blob/master/solr/ core/src/java/org/apache/solr/core/SolrCore.java#L1611) in openNewSearcher doesn't check for whether or not the core is closed, it can possibly run after the core runs closeSearcher and assign the newly constructed searcher to realtimeSearcher again, which will never be cleaned up. The fix is to check if the SolrCore is closed inside the synchronized block, and if so, clean up the newly constructed searcher and throw an Exception.



--
This message was sent by Atlassian JIRA
(v6.3.4#6332)

---------------------------------------------------------------------
To unsubscribe, e-mail: dev-unsubscribe@lucene.apache.org
For additional commands, e-mail: dev-help@lucene.apache.org