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From Jonathan Ellis <jbel...@gmail.com>
Subject Re: DigestMismatchException
Date Tue, 09 Mar 2010 05:13:05 GMT
yes.

On Mon, Mar 8, 2010 at 5:40 PM, B. Todd Burruss <bburruss@real.com> wrote:
> i'm doing quorum reads and quorum writes with N=3 and 4 node cluster.  i am
> "updating" values in cassandra cluster at a fairly high rate.
>
> so does this mean that a read is obtaining its two values (because of
> "quorum") and one of them must have been from the "third" replica that may
> not have been updated yet by async replication?
>
> On Mon, 2010-03-08 at 15:36 -0800, Jonathan Ellis wrote:
>
> It means that you're doing a lot of reads that saw multiple versions
> of the answer, which depending on your workload may be normal
>
> On Mon, Mar 8, 2010 at 5:31 PM, B. Todd Burruss <bburruss@real.com> wrote:
>> i am seeing a lot of these INFO level messages in cassandra server's logs:
>>
>> 2010-03-08 15:30:08,123  INFO [pool-1-thread-625] [StorageProxy.java:485]
>> DigestMismatchException: Mismatch for key vmguest85__1349889195
>> (076e19c042e3756a619a8b3fcdd1b9f2 vs 6a2d12aebba5c51c1d9a60cd0ec556d9)
>>
>> anything to worry about?
>>
>> thx
>
>

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