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From Robert Wille <>
Subject Re: Dropped mutation messages
Date Sat, 13 Jun 2015 14:57:21 GMT

Internode messages which are received by a node, but do not get not to be processed within
rpc_timeout are dropped rather than processed. As the coordinator node will no longer be waiting
for a response. If the Coordinator node does not receive Consistency Level responses before
the rpc_timeout it will return a TimedOutException to the client.

I understand that, but that’s where this makes no sense. I’m running with RF=1, and CL=QUORUM,
which means each update goes to one node, and I need one response for a success. I have many
thousands of dropped mutation messages, but no TimedOutExceptions thrown back to the client.
If I have GC problems, or other issues that are making my cluster unresponsive, I can deal
with that. But having writes that fail and no error is clearly not acceptable. How is it possible
to be getting errors and not be informed about them?



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