Github user NicoK commented on a diff in the pull request: https://github.com/apache/flink/pull/4581#discussion_r152813899 --- Diff: flink-runtime/src/test/java/org/apache/flink/runtime/io/network/partition/SpillableSubpartitionTest.java --- @@ -192,21 +198,39 @@ public void testConsumeSpilledPartition() throws Exception { Buffer read = reader.getNextBuffer(); assertNotNull(read); + assertNotSame(buffer, read); + assertFalse(read.isRecycled()); read.recycle(); + assertTrue(read.isRecycled()); read = reader.getNextBuffer(); assertNotNull(read); + assertNotSame(buffer, read); + assertFalse(read.isRecycled()); read.recycle(); + assertTrue(read.isRecycled()); read = reader.getNextBuffer(); assertNotNull(read); + assertNotSame(buffer, read); + assertFalse(read.isRecycled()); read.recycle(); + assertTrue(read.isRecycled()); // End of partition read = reader.getNextBuffer(); assertNotNull(read); assertEquals(EndOfPartitionEvent.class, EventSerializer.fromBuffer(read, ClassLoader.getSystemClassLoader()).getClass()); + assertFalse(read.isRecycled()); read.recycle(); + assertTrue(read.isRecycled()); + + // finally check that the buffer has been freed after a successful (or failed) write --- End diff -- no - this is why I added numerous more tests now :) thanks for pointing this out
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