Using explicit "unlock" causes TimeoutException for other Threads ----------------------------------------------------------------- Key: ISPN-2013 URL: https://issues.jboss.org/browse/ISPN-2013 Project: Infinispan Issue Type: Bug Components: Locking and Concurrency Affects Versions: 5.1.2.FINAL Environment: Windows 7 64-bit Reporter: Dmitry Udalov Assignee: Pedro Ruivo Fix For: 6.0.0.Final Attachments: LockTest.java In a test I have several tasks that run on a single cache node configured as transactional pessimistic replicated cache. If I explicitly call "unlock" then I consistently see TimeoutException reported by some tasks. Without explicit "unlock" the test works fine. Does it mean that I should never call "unlock" and rely on transaction.commit/rollback ? It's seen with infinispan-5.1.2.FINAL Here's what in a nutshell each task does: final lockKey = ... executor.submit(new Callable<Boolean>() { public Boolean call() throws Exception TransactionManager tx = cache.getAdvancedCache().getTransactionManager(); tx.begin() try { if ( lockManager.lock(lockKey) ) { // ... // removing next line makes test happy. Otherwise some tasks report TimeoutException (pls. see the stack traces) cache.getLockManager().unlock(lockKey); } } catch(Throwable t) { tx.setRollbackOnly(); } finally { if (ut.getStatus() == Status.STATUS_ACTIVE) ut.commit(); else ut.rollback(); } By the time I received that exception all other tasks were completed and they released the lock on the key in question. I also see that LockManagerImpl.lock recognized that the lock was not owned by any thread - see "Lock held by [null]", which seems to be right. But yet the lock failed to be acquired. Is it a matter to trying it one more time? org.infinispan.util.concurrent.TimeoutException: Unable to acquire lock after [10 seconds] on key [foo] for requestor [GlobalTransaction:<Sound-15075>:8:local]! Lock held by [null] at org.infinispan.util.concurrent.locks.LockManagerImpl.lock(LockManagerImpl.java:206) at org.infinispan.util.concurrent.locks.LockManagerImpl.acquireLock(LockManagerImpl.java:180) at org.infinispan.util.concurrent.locks.LockManagerImpl.acquireLock(LockManagerImpl.java:170) at org.infinispan.interceptors.locking.AbstractTxLockingInterceptor.lockKeyAndCheckOwnership(AbstractTxLockingInterceptor.java:209) at org.infinispan.interceptors.locking.AbstractTxLockingInterceptor.lockAndRegisterBackupLock(AbstractTxLockingInterceptor.java:136) at org.infinispan.interceptors.locking.PessimisticLockingInterceptor.visitLockControlCommand(PessimisticLockingInterceptor.java:228) at org.infinispan.commands.control.LockControlCommand.acceptVisitor(LockControlCommand.java:129) at org.infinispan.interceptors.base.CommandInterceptor.invokeNextInterceptor(CommandInterceptor.java:116) at org.infinispan.interceptors.base.CommandInterceptor.handleDefault(CommandInterceptor.java:130) at org.infinispan.commands.AbstractVisitor.visitLockControlCommand(AbstractVisitor.java:159) at org.infinispan.commands.control.LockControlCommand.acceptVisitor(LockControlCommand.java:129) at org.infinispan.interceptors.base.CommandInterceptor.invokeNextInterceptor(CommandInterceptor.java:116) at org.infinispan.interceptors.TxInterceptor.visitLockControlCommand(TxInterceptor.java:144) at org.infinispan.commands.control.LockControlCommand.acceptVisitor(LockControlCommand.java:129) at org.infinispan.interceptors.base.CommandInterceptor.invokeNextInterceptor(CommandInterceptor.java:116) at org.infinispan.interceptors.StateTransferLockInterceptor.handleWithRetries(StateTransferLockInterceptor.java:207) at org.infinispan.interceptors.StateTransferLockInterceptor.visitLockControlCommand(StateTransferLockInterceptor.java:138) at org.infinispan.commands.control.LockControlCommand.acceptVisitor(LockControlCommand.java:129) at org.infinispan.interceptors.base.CommandInterceptor.invokeNextInterceptor(CommandInterceptor.java:116) at org.infinispan.interceptors.base.CommandInterceptor.handleDefault(CommandInterceptor.java:130) at org.infinispan.commands.AbstractVisitor.visitLockControlCommand(AbstractVisitor.java:159) at org.infinispan.commands.control.LockControlCommand.acceptVisitor(LockControlCommand.java:129) at org.infinispan.interceptors.base.CommandInterceptor.invokeNextInterceptor(CommandInterceptor.java:116) at org.infinispan.interceptors.InvocationContextInterceptor.handleAll(InvocationContextInterceptor.java:130) at org.infinispan.interceptors.InvocationContextInterceptor.visitLockControlCommand(InvocationContextInterceptor.java:94) at org.infinispan.commands.control.LockControlCommand.acceptVisitor(LockControlCommand.java:129) at org.infinispan.interceptors.InterceptorChain.invoke(InterceptorChain.java:345) at org.infinispan.CacheImpl.lock(CacheImpl.java:484) at org.infinispan.CacheImpl.lock(CacheImpl.java:468)