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From Nate McCall <>
Subject Re: Cassandra stalls and dropped messages not due to GC
Date Mon, 02 Nov 2015 19:35:48 GMT
> Forgive me, but what is CMS?

Sorry - ConcurrentMarkSweep garbage collector.

> No. I’ve tried some mitigations since tuning thread pool sizes and GC, but
> the problem begins with only an upgrade of Cassandra. No other system
> packages, kernels, etc.
>From what 2.0 version did you upgrade? If it was < 2.0.7, you would need to
run 'nodetool upgradesstables'  but I'm not sure the issue would manifest
that way. Otherwise, double check the DSE release notes and upgrade guide.
I've not had any issues like this going from 2.0.x to 2.1.x on vanilla C*.

Nate McCall
Austin, TX

Co-Founder & Sr. Technical Consultant
Apache Cassandra Consulting

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