ascherbakoff commented on code in PR #4540:
URL: https://github.com/apache/ignite-3/pull/4540#discussion_r1812149089


##########
modules/transactions/src/main/java/org/apache/ignite/internal/tx/impl/HeapLockManager.java:
##########
@@ -158,14 +162,22 @@ public HeapLockManager(DeadlockPreventionPolicy 
deadlockPreventionPolicy, int ma
         }
 
         slots = tmp; // Atomic init.
-
-        parentLockManager.listen(LockEvent.LOCK_CONFLICT, 
parentLockConflictListener);
     }
 
     @Override
     public CompletableFuture<Lock> acquire(UUID txId, LockKey lockKey, 
LockMode lockMode) {
-        if (lockKey.contextId() == null) { // Treat this lock as a hierarchy 
lock.
-            return parentLockManager.acquire(txId, lockKey, lockMode);
+        if (lockKey.contextId() == null) { // Treat this lock as a 
hierarchy(coarse) lock.
+            // Try fast path.
+            CoarseLockState state = coarseMap.get(lockKey);
+
+            if (state == null) {
+                // Atomically init state.
+                CoarseLockState s = new CoarseLockState(lockKey);
+                CoarseLockState cur = coarseMap.putIfAbsent(lockKey, s);
+                state = (cur == null ? s : cur);

Review Comment:
   Correct. Replaced with computeIfAbsent



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