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Tim Onyschak commented on IGNITE-7090: -------------------------------------- Forgive me, i'm learning git as i go. A new pull request is above. Anyway, take a look at this pull request. I was getting confused when GridCacheSemaphoreEx sem = cast(dsMap.get(key), GridCacheSemaphoreEx.class) was always returning null and how we would access it. BUt after further debuggin was i able to understand what you meant. Let me know what you think. > Semaphore Stuck when no acquirers to assign permit > -------------------------------------------------- > > Key: IGNITE-7090 > URL: https://issues.apache.org/jira/browse/IGNITE-7090 > Project: Ignite > Issue Type: Bug > Components: cache, data structures > Affects Versions: 2.1, 2.4 > Reporter: Tim Onyschak > Priority: Major > Fix For: 2.5 > > Attachments: SemaphoreFailoverNoWaitingAcquirerTest.java > > > If no acquirers are available to take permit of semaphore, the permit never > gets release and any further acquirerers will wait forever. > On node shut down DataStructuresProcessor.dsMap gets cleared out prior to > event listener being able to execute onNodeRemoved, hence owner is never > cleared out if it was unable to pass to a different acquirer. > -- This message was sent by Atlassian JIRA (v7.6.3#76005)