[jboss-jira] [JBoss JIRA] Created: (JBAS-7123) JBossCacheManager remains open to requests after shutdown

[Brian Stansberry (JIRA)]

JBossCacheManager remains open to requests after shutdown
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                 Key: JBAS-7123
                 URL: https://jira.jboss.org/jira/browse/JBAS-7123
             Project: JBoss Application Server
          Issue Type: Bug
      Security Level: Public (Everyone can see)
          Components: Clustering, Web (Tomcat) service
    Affects Versions: JBossAS-5.1.0.GA
            Reporter: Brian Stansberry
            Assignee: Brian Stansberry
             Fix For: JBossAS-5.2.0.Beta1, JBossAS-6.0.0.Alpha1


The work Paul Ferraro did with LockValve ensures that typically application activity cannot reach the clustered session manager after its stop() processing executes, but testing is showing the StandardHostValve can end up causing calls to findSession that end up blowing up with an NPE.  That's the specific issue; in general, the methods in the Manager API need to be hardened to react properly if invoked during/after shutdown.

Solution is to use the same semaphore that LockValve uses, but use it internally -- add tryLock/release calls around the relevant code. Once stop() processing proceeds, tryLock will fail and the methods can react appropriately.

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