[jbosscache-issues] [JBoss JIRA] Commented: (JBCACHE-1544) Optimistic locking and eviction
Aleksander Adamowski (JIRA)
jira-events at lists.jboss.org
Mon Apr 12 12:51:37 EDT 2010
[ https://jira.jboss.org/jira/browse/JBCACHE-1544?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12525180#action_12525180 ]
Aleksander Adamowski commented on JBCACHE-1544:
-----------------------------------------------
Galder, does the workaround imply usage of the attached jboss-cache-jdk50.jar ?
What's the difference between this jar and the one attached in JBCACHE-1545?
> Optimistic locking and eviction
> -------------------------------
>
> Key: JBCACHE-1544
> URL: https://jira.jboss.org/jira/browse/JBCACHE-1544
> Project: JBoss Cache
> Issue Type: Bug
> Security Level: Public(Everyone can see)
> Affects Versions: 1.4.1.SP13
> Reporter: Mircea Markus
> Assignee: Galder Zamarreno
> Attachments: cluster-evictor.tar.gz, jboss-cache-jdk50.jar, optimistic-replicated-eviction.xml, OptimisticReplicatedEvictionTest.java, patch-v1.txt
>
>
> Since eviction is done per node, it is easy to get the cache into a bad
> state. For example, a 2-node cluster, OPTIMISTIC, REPL_SYNC, 60 second
> eviction:
> On Node A:
> cache.put ( "/foo", 0, 0 ); // this could be from any node
> for ( ;; ) {
> Thread.sleep ( 30000 ); // wait 30 seconds
> cache.get ( "/foo", 0 ); // refresh the eviction timer so the node will
> never be evicted on A
> }
> ---------
> This is just using the default JBC versioning, and direct cache access.
> No hibernate.
> There's no special configuration for the cache except what I listed
> (OPTIMISTIC, REPL_SYNC, 60 second
> eviction). No code hitting the cache except what I listed below.
> By the way, this is EAP 4.3 CP05 (JBC 1.4.1.SP13).
> On Node B:
> // wait at least 60 seconds after the original put for the node to be
> evicted on B
> cache.put ( "/foo", 0, 0 ); // will always fail during replication to A:
> org.jboss.cache.optimistic.DataVersioningException: DataNode [/foo]
> version Ver=2 is newer than workspace node Ver=1
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