pnowojski commented on a change in pull request #15425:
URL: https://github.com/apache/flink/pull/15425#discussion_r604664970
##########
File path:
flink-streaming-java/src/main/java/org/apache/flink/streaming/runtime/tasks/SourceOperatorStreamTask.java
##########
@@ -97,6 +97,11 @@ public void init() throws Exception {
inputProcessor = new StreamOneInputProcessor<>(input, output,
operatorChain);
}
+ @Override
+ protected void finishTask() throws Exception {
+ stopMailboxProcessor();
Review comment:
If you go through the annotations/git blame of the cancellables and how
were they introduced (you need to go through two or three levels of changes),
you will find this: https://issues.apache.org/jira/browse/FLINK-3466
and commit message:
> [FLINK-3466] [runtime] Make state handles cancelable.
>
> State handles are cancelable, to make sure long running checkpoint restore
operations do finish early on cancallation, even if the code does not properly
react to interrupts.
>
> This is especially important since HDFS client code is so buggy that it
deadlocks when interrupted without closing.
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