rkhachatryan commented on a change in pull request #13000:
URL: https://github.com/apache/flink/pull/13000#discussion_r462304537
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File path:
flink-streaming-java/src/main/java/org/apache/flink/streaming/runtime/tasks/StreamTask.java
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@@ -562,6 +567,7 @@ private void runMailboxLoop() throws Exception {
protected void afterInvoke() throws Exception {
LOG.debug("Finished task {}", getName());
+ getCompletionFuture().exceptionally(unused -> null).join();
Review comment:
So you suggest to
1. move `.exceptionally(unused -> null)` from `StreamTask` to
`SourceStreamTask` (or wrap in some other way)
2. in `StreamTask`, propagate failure as a programming error
Did I get you right?
If so, I think it introduces an unnecessary contract that
`getCompletionFuture` never completes exceptionally and actually makes the code
less error-prone (think of other `StreamTask` subclasses).
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