I noticed this as well in a machine that was left running with the current 0.7 branch code. 

Created https://issues.apache.org/jira/browse/CASSANDRA-2131


On 08 Feb, 2011,at 04:34 AM, Jake Luciani <jakers@gmail.com> wrote:

This sounds like a possible bug since the BRAF was re-written in 0.7.1. Could you open a ticket?

On Mon, Feb 7, 2011 at 10:32 AM, Patrik Modesto <patrik.modesto@gmail.com> wrote:
On Mon, Feb 7, 2011 at 15:42, Thibaut Britz
<thibaut.britz@trendiction.com> wrote:
> I think this is related to a faulty disk.

I'm not sure thats the problem. Cassandra 0.7.0 didn't report any
problem. It started with Cassandra 0.7.1.