[teiid-issues] [JBoss JIRA] (TEIID-5059) CacheEntry memory leak due to issues with touch method

[Steven Hawkins (JIRA)]

     [ https://issues.jboss.org/browse/TEIID-5059?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Steven Hawkins resolved TEIID-5059.
-----------------------------------
    Resolution: Done


Updated the touch logic so that the item is always en queued.  This highlighted several places in the temptable/stree logic that relied upon referencing the values coming from a non-evicted batch.  Also added defensive logic to the buffermanager cleaner and more assertions to catch situations like these in development.

> CacheEntry memory leak due to issues with touch method
> ------------------------------------------------------
>
>                 Key: TEIID-5059
>                 URL: https://issues.jboss.org/browse/TEIID-5059
>             Project: Teiid
>          Issue Type: Bug
>          Components: Query Engine
>            Reporter: Steven Hawkins
>            Assignee: Steven Hawkins
>            Priority: Blocker
>             Fix For: 10.0, 8.12.x-6.4, 9.2.6, 9.3.3
>
>
> CacheEntry instances that are in the memory entries end up not in the eviction queue in specific circumstances with when the touch method is called - the batch needs to be already persisted resident and be accessed within the min tick interval after being removed from the eviction queue.  Typically that usage pattern only occurs with temporary tables.
> Defensive code will be added to the buffermanager cleaner to check if memory entries are being accumulated as well.



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