[jbosscache-issues] [JBoss JIRA] Created: (JBCACHE-1445) Problem with cleanup after data gravitation

[Brian Stansberry (JIRA)]

Problem with cleanup after data gravitation
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                 Key: JBCACHE-1445
                 URL: https://jira.jboss.org/jira/browse/JBCACHE-1445
             Project: JBoss Cache
          Issue Type: Bug
      Security Level: Public (Everyone can see)
          Components: Buddy Replication
    Affects Versions: 3.0.0.GA
            Reporter: Brian Stansberry
            Assignee: Manik Surtani


JBoss AS web session replication soak testing is showing issues with buddy replication. One of the failure modes seems to show leftover data remaining in the main tree for a session's former owner after the session has failed over to another node.

I've taken this issue as a good chance to start filling in the test infrastructure in the org.jboss.cache.integration package. Test org.jboss.cache.integration.websession.BuddyReplicationFailoverTest.testFailoverAndFailBack() shows the issue.

I think some of the tests in the buddyreplication package should be checking for this; not sure why they pass. Likely some subtle variation in config or something.

The test uses a lot of infrastructure to mock what the AS does. But underneath it all, the commands to the cache come down to:

node0:

getData(fqn) w/ data gravitation option // nothing there
put(fqn, map)  // establishes session
put(fqn, map) // updates session

node3

getData(fqn) w/ data gravitation option // gravitates session
put(fqn, map) // updates session

At this point the cache contents are examined, and the original node in node0's main tree is still present. A buddy backup node, data owner node3, is also present on node0, as it should be.

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