zentol commented on code in PR #20157:
URL: https://github.com/apache/flink/pull/20157#discussion_r914777339
##########
flink-runtime/src/test/java/org/apache/flink/runtime/io/network/partition/ResultPartitionTest.java:
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@@ -405,20 +395,37 @@ public void testIdleAndBackPressuredTime() throws
IOException, InterruptedExcept
// wait until request thread start to run.
syncLock.await();
- Thread.sleep(100);
+ // wait until request buffer blocking.
+ boolean bufferPoolBlocking = false;
+
+ for (int i = 0; i < 50; i++) {
+ StackTraceElement[] stackTrace = requestThread.getStackTrace();
+ bufferPoolBlocking = isInBlockingBufferRequest(stackTrace);
+
+ if (bufferPoolBlocking) {
+ break;
+ } else {
+ // Retry
+ Thread.sleep(500);
+ }
+ }
+
+ // Verify that Thread was in blocking request
+ assertThat(bufferPoolBlocking)
+ .isTrue()
+ .withFailMessage("Did not trigger blocking buffer request.");
Review Comment:
```suggestion
while (!isInBlockingBufferRequest(requestThread.getStackTrace()) {
Thread.sleep(50);
}
```
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