davidradl commented on code in PR #26219:
URL: https://github.com/apache/flink/pull/26219#discussion_r1975168566
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flink-runtime/src/main/java/org/apache/flink/streaming/runtime/tasks/mailbox/TaskMailboxImpl.java:
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@@ -243,11 +243,11 @@ private Mail takeOrNull(Deque<Mail> queue, int priority) {
@Override
public List<Mail> drain() {
- List<Mail> drainedMails = new ArrayList<>(batch);
- batch.clear();
Review Comment:
should we be eagerly grabbing the lock in all these methods so all
processing is done under the lock? for example all references to batch should
be under the lock as the value could change under us.
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