Github user vanzin commented on the pull request:
https://github.com/apache/spark/pull/654#issuecomment-45557210
Yeah, there are a few other events that could use a timestamp
(SparkListenerEnvironmentUpdate, SparkListenerUnpersistRDD).
In any case, somewhat unrelated, but if those changes are desired, I'd
suggest investigating a more automatic way of creating the serialized events;
manually handing the conversion to and from JSON is tedious and error-prone.
I'm not familiar with the json4s library, but I'm thinking along the lines of
Jackson's automatic reflection-based introspector + annotations for dealing
with backwards compatibility / missing properties / other issues.
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