zhijiangW commented on a change in pull request #11877:
URL: https://github.com/apache/flink/pull/11877#discussion_r424860940
##########
File path:
flink-runtime/src/main/java/org/apache/flink/runtime/io/network/partition/consumer/BufferManager.java
##########
@@ -151,23 +150,43 @@ int requestFloatingBuffers(int numRequired) throws
IOException {
return numRequestedBuffers;
}
- numRequiredBuffers = numRequired;
+ numRequiredBuffers += numRequired;
+ numRequestedBuffers =
internalRequestFloatingBuffers(numRequiredBuffers);
+ numRequiredBuffers -= numRequestedBuffers;
+ }
+ return numRequestedBuffers;
+ }
- while (bufferQueue.getAvailableBufferSize() <
numRequiredBuffers && !isWaitingForFloatingBuffers) {
- BufferPool bufferPool =
inputChannel.inputGate.getBufferPool();
- Buffer buffer = bufferPool.requestBuffer();
- if (buffer != null) {
- bufferQueue.addFloatingBuffer(buffer);
- numRequestedBuffers++;
- } else if (bufferPool.addBufferListener(this)) {
- isWaitingForFloatingBuffers = true;
- break;
- }
+ private int internalRequestFloatingBuffers(int numBuffersToRequest)
throws IOException {
+ assert Thread.holdsLock(bufferQueue);
+
+ int numRequestedBuffers = 0;
+ while (numRequestedBuffers < numBuffersToRequest &&
!isWaitingForFloatingBuffers) {
+ BufferPool bufferPool =
inputChannel.inputGate.getBufferPool();
+ Buffer buffer = bufferPool.requestBuffer();
+ if (buffer != null) {
+ bufferQueue.addFloatingBuffer(buffer);
+ numRequestedBuffers++;
+ } else if (bufferPool.addBufferListener(this)) {
+ isWaitingForFloatingBuffers = true;
+ break;
}
}
return numRequestedBuffers;
}
+ public void unregisterBufferListenerAndReleaseFloatingBuffers() {
+ synchronized (bufferQueue) {
+ if (isWaitingForFloatingBuffers) {
+
inputChannel.inputGate.getBufferPool().removeBufferListener(this);
+ isWaitingForFloatingBuffers = false;
+ }
+
+ int bufferReleased =
bufferQueue.releaseFloatingBuffers();
Review comment:
nit: numReleasedBuffers
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