mjsax commented on code in PR #17005:
URL: https://github.com/apache/kafka/pull/17005#discussion_r1742817450


##########
docs/streams/upgrade-guide.html:
##########
@@ -135,6 +135,12 @@ <h3 class="anchor-heading"><a id="streams_notable_changes" 
class="anchor-link"><
 
     <h3><a id="streams_api_changes_400" 
href="#streams_api_changes_400">Streams API changes in 4.0.0</a></h3>
 
+    <p>
+        In this release two configs default.deserialization.exception.handler 
and default.production.exception.handler are deprecated, as they don't have any 
overwrites, which is described in
+        <a 
href="https://cwiki.apache.org/confluence/display/KAFKA/KIP-1056%3A+Remove+%60default.%60+prefix+for+exception+handler+StreamsConfig";>KIP-1056</a>
+        You can refer to new configs via 
<code>StreamsConfig#DESERIALIZATION_EXCEPTION_HANDLER_CLASS_CONFIG</code> and 
<code>StreamsConfig#PRODUCTION_EXCEPTION_HANDLER_CLASS_CONFIG</code>.

Review Comment:
   I think it's better to use config name 
`<code>deserialization.exception.handler</code>` directly, and not refer to 
`StreamsConfig` -- in the end, the config name changed, what is the central 
thing (eg, for config files) -- it's only a "side effect" that we also add new 
variables to `StreamsConfig`.



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