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From Jianing Hu <>
Subject Re: cassandra 0.6.1 read returns wrong data?
Date Thu, 29 Jul 2010 23:43:30 GMT
Hi Aaron,

Thanks for the reply. Can you explain what you mean by "sharing
connections around"?

I'm just calling a simple "get", and the data returned is for a
completely different key. It's intermittent and hard to produce in my
test environment, but can be observed in our production environment
couple hundred times a day.

- Jianing

On Thu, Jul 29, 2010 at 2:58 PM, Aaron Morton <> wrote:
> I noticed this once when accidentally sharing connections around. Could that
> be the case ?
> What sort of commands are you running ? Could you be seeing this problem ?
> Aaron
> On 29 Jul, 2010,at 12:47 PM, Jianing Hu <> wrote:
> We recently migrated part of our MySQL database to a 3-node Cassandra
> cluster with a replication factor of 3. Couple of days ago we noticed
> that Cassandra sometimes returns the wrong data. Not corrupted data,
> but data for a different key than the one being asked for. This error
> appears to be random and intermittent, and happens for maybe every 10K
> reads. I'm working on a test suite that can reproduce this. Meanwhile
> just wanted to ask if anyone has seen this problem before? I've tried
> consistency levels of both QUORUM and ONE, and see the issue with
> both.
> Thanks,
> - Jianing

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