vvcephei commented on a change in pull request #9273:
URL: https://github.com/apache/kafka/pull/9273#discussion_r499842547
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File path: streams/src/main/java/org/apache/kafka/streams/KafkaStreams.java
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@@ -436,6 +496,8 @@ private void maybeSetError() {
}
if (setState(State.ERROR)) {
+ metrics.close();
Review comment:
It certainly might. I'm just wary of how far into the uncanny valley
we're going here. Streams is going to be put into a state that's very similar
to the one that `close()` produces, but not identical. What will then happen
when they _do_ call close?
OTOH, we could instead change direction on the "error-vs-shutdown" debase
and just make all these methods call `close(ZERO)` instead. Then, the _real_
close method will be invoked, and Streams will go through a well-known
transition through `PENDING_SHUTDOWN` to `NOT_RUNNING`.
It would then be a problem for a later date (after KIP-663) if someone
wanted to request that instead the app should stop all running threads so they
can manually call "addThread" later.
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