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From "Vladimir Ozerov (JIRA)" <j...@apache.org>
Subject [jira] [Created] (IGNITE-2671) Node cannot join topology when cache lock is held.
Date Wed, 17 Feb 2016 07:09:18 GMT
Vladimir Ozerov created IGNITE-2671:
---------------------------------------

             Summary: Node cannot join topology when cache lock is held.
                 Key: IGNITE-2671
                 URL: https://issues.apache.org/jira/browse/IGNITE-2671
             Project: Ignite
          Issue Type: Bug
          Components: cache
    Affects Versions: 1.5.0.final
            Reporter: Vladimir Ozerov
            Priority: Critical
             Fix For: 1.6


The problem is originally reported by Mario: http://apache-ignite-users.70518.x6.nabble.com/Semaphore-blocking-on-tryAcquire-while-holding-a-cache-lock-td3031.html

*Description*
When a lock is held on a cache key, another node cannot join topology. It hangs somewhere
on partition exchange future.

*Steps to reproduce*
Run the following code and observe that ">>> STARTED 2" is never printed because
we cannot leave Ignition.start() method.

{code}
public static void main(String[] args) {
    // Start the first node.
    Ignite ignite = Ignition.start(new IgniteConfiguration().setGridName("1"));

    System.out.println(">>> STARTED 1");

    // Create cache and obtain a lock on it.
    CacheConfiguration<String, String> ccfg =
        new CacheConfiguration<String, String>().setAtomicityMode(CacheAtomicityMode.TRANSACTIONAL);

    ignite.getOrCreateCache(ccfg).lock("key").lock();

    System.out.println(">>> LOCKED");

    Ignition.start(new IgniteConfiguration().setGridName("2"));

    System.out.println(">>> STARTED 2");
}
{code}



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