[hibernate-issues] [Hibernate-JIRA] Created: (HHH-5215) SQLQueryImpl Memory Leak causes OutOfMemoryException

[Pamir Erdem (JIRA)]

SQLQueryImpl Memory Leak causes OutOfMemoryException
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                 Key: HHH-5215
                 URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-5215
             Project: Hibernate Core
          Issue Type: Bug
    Affects Versions: 3.3.2
         Environment: Sun Solaris 10 Sparc
            Reporter: Pamir Erdem
         Attachments: nativequeryspec.jpg, Query.jpg, sameQueryOutGoingRef.jpg

In one of our batch operations gets OutOfMemoryExcetion. Working on heap dump, it is found out that, same query cached  more than once.
In the picture below the query is shown.
!Query.jpg!

After we found out that the root cause of the problem is the QueryPlanCache, the batch was executed under eclipse environment to find what was wrong.

Altough the only qery is the query.jpg the query plan cache was so high that it can be  seen easly from MAT.
!nativequeryspec.jpg!

We get the picture below by going outgoing references from MAT.
!sameQueryOutGoingRef.jpg!

>From debugging view of eclipse, we want to produce the problem step by step to prove the heap dump.
The first step was looking at the source code where hashCode was calculated.
!!


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