Github user cestella commented on the issue:
https://github.com/apache/metron/pull/1012
Ok, this looks great, one request though. It appears that, at least for
the profiler, it is required that objects used in Stellar be Java serializable
if they aren't listed in that exception list.
We ensure that the objects are kryo serializable
[here](https://github.com/apache/metron/blob/91a017b6dcefc250bfd67cecf9803cb59015d213/metron-stellar/stellar-common/src/main/java/org/apache/metron/stellar/common/utils/StellarProcessorUtils.java#L64)
Can we also make a blurb that they're java serializable? I know that
OnlineStatisticsProvider will not be java serializable due to its dependence on
t-digest, so maybe make that check optional but on by default?
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