[jira] [Created] (IGNITE-3090) Memory leak in IgniteH2Indexing prepared statements cache

["Denis Magda (JIRA)" <ji...@apache.org>]

Denis Magda created IGNITE-3090:
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             Summary: Memory leak in IgniteH2Indexing prepared statements cache 
                 Key: IGNITE-3090
                 URL: https://issues.apache.org/jira/browse/IGNITE-3090
             Project: Ignite
          Issue Type: Bug
    Affects Versions: 1.5.0.final
            Reporter: Denis Magda
             Fix For: 1.6


IgniteH2Indexing caches prepared statements in {{stmtCache}} that uses Threads as keys. Under they high load when there are many Threads the cache can grow significantly. Plus if a Thread is terminated its prepared statements are not get cleaned introducing a memory leak. 

A special background Thread should be introduced that will iterate over {{stmCache}} performing the following:
- cleaning records for terminated Threads;
- cleaning records of the Threads that were not used for a long time. A special configuration parameter can be set.





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