TanYuxin-tyx commented on code in PR #24688:
URL: https://github.com/apache/flink/pull/24688#discussion_r1572099075


##########
flink-runtime/src/main/java/org/apache/flink/runtime/io/network/partition/hybrid/tiered/storage/SortBufferAccumulator.java:
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@@ -338,11 +365,22 @@ private Buffer requestBuffer() {
     }
 
     private void releaseFreeBuffers() {
-        freeSegments.forEach(this::recycleBuffer);
-        freeSegments.clear();
+        synchronized (lock) {
+            isDataBufferReleased = true;
+            freeSegments.forEach(this::recycleBuffer);
+            freeSegments.clear();
+        }
     }
 
     private void recycleBuffer(MemorySegment memorySegment) {
-        checkNotNull(bufferRecycler).recycle(memorySegment);
+        synchronized (lock) {
+            if (!isDataBufferReleased
+                    && currentDataBuffer != null
+                    && !currentDataBuffer.isReleased()) {
+                freeSegments.add(memorySegment);

Review Comment:
   Make sense. Added the lock.



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