[IGNITE-2671] Node cannot join topology when cache lock is held.

• Type: Bug
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: 1.5.0.final
• Component/s: cache
• Labels: community
• Assignee: Unassigned
• Reporter: Vladimir Ozerov
• Created: 17/Feb/16 07:08
• Updated: 25/Sep/17 08:55

Description

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.

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");
}