prateekm commented on a change in pull request #1437:
URL: https://github.com/apache/samza/pull/1437#discussion_r527227011
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File path:
samza-core/src/main/java/org/apache/samza/coordinator/metadatastore/CoordinatorStreamStore.java
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@@ -111,6 +111,10 @@ public void init() {
systemConsumer.start();
systemProducer.register(SOURCE);
systemProducer.start();
+ Runtime.getRuntime().addShutdownHook(new Thread(() -> {
Review comment:
Relying on shutdown hooks for lifecycle management of components is not
a good idea.
The close should be called by whoever created the SystemProducer etc
instead. If it's created in this class, this class should have lifecycle
methods of it's own, which should be called by the owner of this class.
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