Github user dan-blanchard commented on a diff in the pull request:
https://github.com/apache/storm/pull/1136#discussion_r54769764
--- Diff: conf/defaults.yaml ---
@@ -226,7 +226,7 @@ topology.eventlogger.executors: null
topology.tasks: null
# maximum amount of time a message has to complete before it's considered
failed
topology.message.timeout.secs: 30
-topology.multilang.serializer: "org.apache.storm.multilang.JsonSerializer"
+topology.multilang.serializer:
"org.apache.storm.multilang.MessagePackSerializer"
--- End diff --
While having the `MessagePackSeriailzer` built-in would be amazing,
changing it to the default serializer would break a lot of multi-lang
libraries, so I don't think that's a great idea. Let people opt in.
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