TimeoutException thrown at line 46 is not caught and the lock never released.  Hot Rod client will retry the same clear command on a different node, leading to a deadlock.

core/src/main/java/org/infinispan/interceptors/locking/NonTransactionalLockingInterceptor.java
~~~
     39    @Override
     40    public Object visitClearCommand(InvocationContext ctx, ClearCommand command) throws Throwable {
     41       assertNonTransactional(ctx);
     42       boolean skipLocking = hasSkipLocking(command);
     43       long lockTimeout = getLockAcquisitionTimeout(command, skipLocking);
     44       for (Object key: dataContainer.keySet()) {
     45          if (shouldLock(key, command)) {
     46             lockKey(ctx, key, lockTimeout, skipLocking);
     47          }
     48       }
     49       try {
     50          return invokeNextInterceptor(ctx, command);
     51       } finally {
     52          lockManager.unlockAll(ctx);
     53       }
     54    }
~~~