ableegoldman commented on a change in pull request #9821:
URL: https://github.com/apache/kafka/pull/9821#discussion_r618828160
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File path: docs/streams/upgrade-guide.html
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@@ -93,6 +93,9 @@ <h1>Upgrade Guide and API Changes</h1>
</p>
<h3><a id="streams_api_changes_300"
href="#streams_api_changes_300">Streams API changes in 3.0.0</a></h3>
+ <p>
+ We applyed UnknownStateStoreException to
<code>KafkaStreams#store()</code>: If the specified store name does not exist
in the topology, UnknownStateStoreException will be thrown instead
InvalidStateStoreException(<a
href="https://cwiki.apache.org/confluence/display/KAFKA/KIP-216%3A+IQ+should+throw+different+exceptions+for+different+errors";>KIP-216</a>).
Review comment:
```suggestion
A new exception may be thrown from
<code>KafkaStreams#store()</code>. If the specified store name does not exist
in the topology, an UnknownStateStoreException will be thrown instead of the
former InvalidStateStoreException. See <a
href="https://cwiki.apache.org/confluence/display/KAFKA/KIP-216%3A+IQ+should+throw+different+exceptions+for+different+errors";>KIP-216</a>
for more information.
```
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