Concurrent calls to lock and then put seem to be deadlocking. After AdvancedCache.lock is called under a transaction a subsequent call to Cache.put on the same key normally does not attempt to take out a lock, but after a variable number of concurrent calls Cache.put is attempting to take out a lock and then deadlocking with the AdvancedCache.lock call.

Here's my test case which hits the deadlock.

public class DataGridTest {
@Test
public void testCreate() {
CacheManager cacheManager = new DefaultCacheManager();
final String cacheName = "TestCache";

Configuration config = new Configuration();
config.setTransactionManagerLookupClass("org.infinispan.transaction.lookup.DummyTransactionManagerLookup");

cacheManager.defineConfiguration(cacheName, config);

final Cache<Object, Object> cache = cacheManager.getCache(cacheName);
cache.start();

ExecutorService executorService = Executors.newFixedThreadPool(2);
for (int i = 0; i < 1000000; ++i) {
final String valueStr = "V" + i;

executorService.execute(new Runnable() {
@Override
public void run() {
TransactionManager txnMgr = cache.getAdvancedCache().getTransactionManager();

try

{ txnMgr.begin(); }

catch (Exception e)

{ fail(e.getMessage()); }

cache.getAdvancedCache().lock("K1");
cache.put("K1", valueStr);

try { txnMgr.commit(); } catch (Exception e) { fail(e.getMessage()); }

}
});
}

executorService.shutdown();
try {
if (executorService.awaitTermination(300, TimeUnit.SECONDS) == false)

{ fail("Termination timeout"); }

} catch (InterruptedException e)

{ fail("Thread interrupted exception: " + e.getMessage()); }

}
}

...and here's the stack trace showing what appears to be a deadlock timeout.

2010-03-16 08:35:57,821 1 ERROR [org.infinispan.interceptors.InvocationContextInterceptor] Execution error:
org.infinispan.util.concurrent.TimeoutException: Unable to acquire lock after [10 seconds] on key [K1] for requestor [GlobalTransaction:<null>:114691]! Lock held by [GlobalTransaction:<null>:114690]
at org.infinispan.container.EntryFactoryImpl.acquireLock(EntryFactoryImpl.java:213)
at org.infinispan.container.EntryFactoryImpl.wrapEntryForWriting(EntryFactoryImpl.java:148)
at org.infinispan.container.EntryFactoryImpl.wrapEntryForWriting(EntryFactoryImpl.java:106)
at org.infinispan.interceptors.LockingInterceptor.visitPutKeyValueCommand(LockingInterceptor.java:197)
at org.infinispan.commands.write.PutKeyValueCommand.acceptVisitor(PutKeyValueCommand.java:76)
at org.infinispan.interceptors.base.CommandInterceptor.invokeNextInterceptor(CommandInterceptor.java:118)
at org.infinispan.interceptors.base.CommandInterceptor.handleDefault(CommandInterceptor.java:132)
at org.infinispan.commands.AbstractVisitor.visitPutKeyValueCommand(AbstractVisitor.java:57)
at org.infinispan.commands.write.PutKeyValueCommand.acceptVisitor(PutKeyValueCommand.java:76)
at org.infinispan.interceptors.base.CommandInterceptor.invokeNextInterceptor(CommandInterceptor.java:118)
at org.infinispan.interceptors.TxInterceptor.enlistWriteAndInvokeNext(TxInterceptor.java:183)
at org.infinispan.interceptors.TxInterceptor.visitPutKeyValueCommand(TxInterceptor.java:132)
at org.infinispan.commands.write.PutKeyValueCommand.acceptVisitor(PutKeyValueCommand.java:76)
at org.infinispan.interceptors.base.CommandInterceptor.invokeNextInterceptor(CommandInterceptor.java:118)
at org.infinispan.interceptors.InvocationContextInterceptor.handleAll(InvocationContextInterceptor.java:48)
at org.infinispan.interceptors.InvocationContextInterceptor.handleDefault(InvocationContextInterceptor.java:34)
at org.infinispan.commands.AbstractVisitor.visitPutKeyValueCommand(AbstractVisitor.java:57)
at org.infinispan.commands.write.PutKeyValueCommand.acceptVisitor(PutKeyValueCommand.java:76)
at org.infinispan.interceptors.InterceptorChain.invoke(InterceptorChain.java:269)
at org.infinispan.CacheDelegate.put(CacheDelegate.java:434)
at org.infinispan.CacheDelegate.put(CacheDelegate.java:205)
at com.kasm.core.test.DataGridTest$1.run(DataGridTest.java:47)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
at java.lang.Thread.run(Thread.java:637)
2010-03-16 08:35:57,821 1 ERROR [org.infinispan.interceptors.InvocationContextInterceptor] Execution error:
org.infinispan.util.concurrent.TimeoutException: Unable to acquire lock after [10 seconds] on key [K1] for requestor [GlobalTransaction:<null>:114692]! Lock held by [GlobalTransaction:<null>:114690]
at org.infinispan.container.EntryFactoryImpl.acquireLock(EntryFactoryImpl.java:213)
at org.infinispan.container.EntryFactoryImpl.wrapEntryForWriting(EntryFactoryImpl.java:148)
at org.infinispan.container.EntryFactoryImpl.wrapEntryForWriting(EntryFactoryImpl.java:106)
at org.infinispan.interceptors.LockingInterceptor.visitLockControlCommand(LockingInterceptor.java:146)
at org.infinispan.commands.control.LockControlCommand.acceptVisitor(LockControlCommand.java:82)
at org.infinispan.interceptors.base.CommandInterceptor.invokeNextInterceptor(CommandInterceptor.java:118)
at org.infinispan.interceptors.base.CommandInterceptor.handleDefault(CommandInterceptor.java:132)
at org.infinispan.commands.AbstractVisitor.visitLockControlCommand(AbstractVisitor.java:147)
at org.infinispan.commands.control.LockControlCommand.acceptVisitor(LockControlCommand.java:82)
at org.infinispan.interceptors.base.CommandInterceptor.invokeNextInterceptor(CommandInterceptor.java:118)
at org.infinispan.interceptors.TxInterceptor.enlistReadAndInvokeNext(TxInterceptor.java:171)
at org.infinispan.interceptors.TxInterceptor.visitLockControlCommand(TxInterceptor.java:115)
at org.infinispan.commands.control.LockControlCommand.acceptVisitor(LockControlCommand.java:82)
at org.infinispan.interceptors.base.CommandInterceptor.invokeNextInterceptor(CommandInterceptor.java:118)
at org.infinispan.interceptors.InvocationContextInterceptor.handleAll(InvocationContextInterceptor.java:48)
at org.infinispan.interceptors.InvocationContextInterceptor.handleDefault(InvocationContextInterceptor.java:34)
at org.infinispan.commands.AbstractVisitor.visitLockControlCommand(AbstractVisitor.java:147)
at org.infinispan.commands.control.LockControlCommand.acceptVisitor(LockControlCommand.java:82)
at org.infinispan.interceptors.InterceptorChain.invoke(InterceptorChain.java:269)
at org.infinispan.CacheDelegate.lock(CacheDelegate.java:305)
at org.infinispan.CacheDelegate.lock(CacheDelegate.java:298)
at com.kasm.core.test.DataGridTest$1.run(DataGridTest.java:46)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
at java.lang.Thread.run(Thread.java:637)
Exception in thread "pool-2-thread-2" org.infinispan.util.concurrent.TimeoutException: Unable to acquire lock after [10 seconds] on key [K1] for requestor [GlobalTransaction:<null>:114691]! Lock held by [GlobalTransaction:<null>:114690]
at org.infinispan.container.EntryFactoryImpl.acquireLock(EntryFactoryImpl.java:213)
at org.infinispan.container.EntryFactoryImpl.wrapEntryForWriting(EntryFactoryImpl.java:148)
at org.infinispan.container.EntryFactoryImpl.wrapEntryForWriting(EntryFactoryImpl.java:106)
at org.infinispan.interceptors.LockingInterceptor.visitPutKeyValueCommand(LockingInterceptor.java:197)
at org.infinispan.commands.write.PutKeyValueCommand.acceptVisitor(PutKeyValueCommand.java:76)
at org.infinispan.interceptors.base.CommandInterceptor.invokeNextInterceptor(CommandInterceptor.java:118)
at org.infinispan.interceptors.base.CommandInterceptor.handleDefault(CommandInterceptor.java:132)
at org.infinispan.commands.AbstractVisitor.visitPutKeyValueCommand(AbstractVisitor.java:57)
at org.infinispan.commands.write.PutKeyValueCommand.acceptVisitor(PutKeyValueCommand.java:76)
at org.infinispan.interceptors.base.CommandInterceptor.invokeNextInterceptor(CommandInterceptor.java:118)
at org.infinispan.interceptors.TxInterceptor.enlistWriteAndInvokeNext(TxInterceptor.java:183)
at org.infinispan.interceptors.TxInterceptor.visitPutKeyValueCommand(TxInterceptor.java:132)
at org.infinispan.commands.write.PutKeyValueCommand.acceptVisitor(PutKeyValueCommand.java:76)
at org.infinispan.interceptors.base.CommandInterceptor.invokeNextInterceptor(CommandInterceptor.java:118)
at org.infinispan.interceptors.InvocationContextInterceptor.handleAll(InvocationContextInterceptor.java:48)
at org.infinispan.interceptors.InvocationContextInterceptor.handleDefault(InvocationContextInterceptor.java:34)
at org.infinispan.commands.AbstractVisitor.visitPutKeyValueCommand(AbstractVisitor.java:57)
at org.infinispan.commands.write.PutKeyValueCommand.acceptVisitor(PutKeyValueCommand.java:76)
at org.infinispan.interceptors.InterceptorChain.invoke(InterceptorChain.java:269)
at org.infinispan.CacheDelegate.put(CacheDelegate.java:434)
at org.infinispan.CacheDelegate.put(CacheDelegate.java:205)
at com.kasm.core.test.DataGridTest$1.run(DataGridTest.java:47)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
at java.lang.Thread.run(Thread.java:637)
Exception in thread "pool-2-thread-1" org.infinispan.util.concurrent.TimeoutException: Unable to acquire lock after [10 seconds] on key [K1] for requestor [GlobalTransaction:<null>:114692]! Lock held by [GlobalTransaction:<null>:114690]
at org.infinispan.container.EntryFactoryImpl.acquireLock(EntryFactoryImpl.java:213)
at org.infinispan.container.EntryFactoryImpl.wrapEntryForWriting(EntryFactoryImpl.java:148)
at org.infinispan.container.EntryFactoryImpl.wrapEntryForWriting(EntryFactoryImpl.java:106)
at org.infinispan.interceptors.LockingInterceptor.visitLockControlCommand(LockingInterceptor.java:146)
at org.infinispan.commands.control.LockControlCommand.acceptVisitor(LockControlCommand.java:82)
at org.infinispan.interceptors.base.CommandInterceptor.invokeNextInterceptor(CommandInterceptor.java:118)
at org.infinispan.interceptors.base.CommandInterceptor.handleDefault(CommandInterceptor.java:132)
at org.infinispan.commands.AbstractVisitor.visitLockControlCommand(AbstractVisitor.java:147)
at org.infinispan.commands.control.LockControlCommand.acceptVisitor(LockControlCommand.java:82)
at org.infinispan.interceptors.base.CommandInterceptor.invokeNextInterceptor(CommandInterceptor.java:118)
at org.infinispan.interceptors.TxInterceptor.enlistReadAndInvokeNext(TxInterceptor.java:171)
at org.infinispan.interceptors.TxInterceptor.visitLockControlCommand(TxInterceptor.java:115)
at org.infinispan.commands.control.LockControlCommand.acceptVisitor(LockControlCommand.java:82)
at org.infinispan.interceptors.base.CommandInterceptor.invokeNextInterceptor(CommandInterceptor.java:118)
at org.infinispan.interceptors.InvocationContextInterceptor.handleAll(InvocationContextInterceptor.java:48)
at org.infinispan.interceptors.InvocationContextInterceptor.handleDefault(InvocationContextInterceptor.java:34)
at org.infinispan.commands.AbstractVisitor.visitLockControlCommand(AbstractVisitor.java:147)
at org.infinispan.commands.control.LockControlCommand.acceptVisitor(LockControlCommand.java:82)
at org.infinispan.interceptors.InterceptorChain.invoke(InterceptorChain.java:269)
at org.infinispan.CacheDelegate.lock(CacheDelegate.java:305)
at org.infinispan.CacheDelegate.lock(CacheDelegate.java:298)
at com.kasm.core.test.DataGridTest$1.run(DataGridTest.java:46)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
at java.lang.Thread.run(Thread.java:637)