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From "Noam Liran (JIRA)" <j...@apache.org>
Subject [jira] [Created] (IGNITE-2008) Abandoned locks are not released when nodes leave the grid
Date Thu, 26 Nov 2015 09:21:10 GMT
Noam Liran created IGNITE-2008:
----------------------------------

             Summary: Abandoned locks are not released when nodes leave the grid
                 Key: IGNITE-2008
                 URL: https://issues.apache.org/jira/browse/IGNITE-2008
             Project: Ignite
          Issue Type: Bug
    Affects Versions: ignite-1.4
         Environment: Ubuntu 12.04, Ignite 1.4, Java 1.8.0_40-b26 (HotSpot 64-Bit)

            Reporter: Noam Liran


Hi,

We're starting to use Ignite in one of our environments and we've encountered some strange
behaviour in one of our test cases.

# Start two nodes at the same time.
# Each nodes should initialize a cache with the following parameters:
## Cache mode: REPLICATED / PARTITIONED
## Atomicity mode: TRANSACTIONAL
# Both nodes run the following code:
{code}
System.out.println("Sleeping before..");
Thread.sleep(5000);

List<Lock> locks = new ArrayList<>();

System.out.println("Acquiring...");

for (int lockId = 0; lockId < 4; lockId++) {
    String lockName = "LOCK_" + lockId;

    Lock lock = cache.lock(lockName);
    locks.add(lock);
    lock.lock();
}

System.out.println("Acquired!");
Thread.sleep(20000);
System.out.println("Done");
{code}

# Node 1 acquires all the relevant locks and waits a while.
# Node 2 tries to acquire the locks and is blocked.
# Node 1 eventually quits while holding the locks.
# Node 2 never gains control of the locks even though they're abandoned.

When we try the same with a looped tryLock everything seems to work.


Our Ignite configuration is pretty straightforward:
# Regular TCP discovery
# No checkpointing SPI
# No collision SPI
# Always failover SPI
# CONTINUOUS deployment mode



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