[infinispan-issues] [JBoss JIRA] (ISPN-3048) Eviction needs to be transactional

[RH Bugzilla Integration (JIRA)]

    [ https://issues.jboss.org/browse/ISPN-3048?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12813175#comment-12813175 ] 

RH Bugzilla Integration commented on ISPN-3048:
-----------------------------------------------

Dominik Pospisil <dpospisi at redhat.com> made a comment on [bug 1017827|https://bugzilla.redhat.com/show_bug.cgi?id=1017827]

Duplicating EAP issue to track this within Portal.

The performance of cache passivation is much lower in EAP/JPP 6.1 Infinispan compared to 6.0. The regression was introduced as a side effect of passivation issues fix.

Workaroud:

Disable cache passivation. This might have negative impact on memory consumption as the whole cache is stored in-memory.
                
> Eviction needs to be transactional
> ----------------------------------
>
>                 Key: ISPN-3048
>                 URL: https://issues.jboss.org/browse/ISPN-3048
>             Project: Infinispan
>          Issue Type: Bug
>          Components: Eviction
>    Affects Versions: 5.3.0.Alpha1
>            Reporter: Paul Ferraro
>            Assignee: William Burns
>            Priority: Critical
>
> Currently, Infinispan eviction is non-transactional.  This makes Infinispan's eviction manager virtually unusable, since non-transactional eviction can cause phantom reads and data loss because it violates the isolation of concurrent transactions.  This is especially problematic when using a passivation-enabled cache store.  In this case, a cache eviction/passivation can cause a concurrently executed cache retrieval to return null - even though the act of passivation does not change the data - it only changes where it is stored.
> We work around this in the AS by performing eviction manually, using pessimistic locking in combination with eager lock acquisition prior to eviction.  This is unfortunate, since it prevents me from leveraging Infinispan's build-in eviction strategies.

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