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From Dan Washusen <>
Subject Re: RE: batch_mutate failed: out of sequence response
Date Thu, 07 Apr 2011 21:28:11 GMT
Pelops uses a single connection per operation from a pool that is backed by Apache Commons
Pool (assuming you're using Cassandra 0.7). I'm not saying it's perfect but it's NOT sharing
a connection over multiple threads.

Dan Hendry mentioned that he sees these errors. Is he also using Pelops? From his comment
about retrying I'd assume not...

Dan Washusen
On Thursday, 7 April 2011 at 7:39 PM, Héctor Izquierdo Seliva wrote: 
> El mié, 06-04-2011 a las 21:04 -0500, Jonathan Ellis escribió:
> > "out of sequence response" is thrift's way of saying "I got a response
> > for request Y when I expected request X."
> > 
> > my money is on using a single connection from multiple threads. don't do that.
> I'm not using thrift directly, and my application is single thread, so I
> guess this is Pelops fault somehow. Since I managed to tame memory
> comsuption the problem has not appeared again, but it always happened
> during a stop-the-world GC. Could it be that the message was sent
> instead of being dropped by the server when the client assumed it had
> timed out?

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