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From Alain RODRIGUEZ <arodr...@gmail.com>
Subject Re: Invalid Counter Shard errors?
Date Mon, 03 Sep 2012 08:31:03 GMT
Hello,

I'm running a 1.1.2 Cassandra 2 nodes wide cluster with RF=2 (CL = 1,
nodes are m1.large from Amazon).

I had this error 524 times last month on the node 1 and 2805 time on
the second node.

Should I worry about it ? How can I fix these errors ?

Alain

2012/6/2 Peter Schuller <peter.schuller@infidyne.com>:
>> We're running a three node cluster of cassandra 1.1 servers, originally
>> 1.0.7 and immediately after the upgrade the error logs of all three servers
>> began filling up with the following message:
>
> The message you are receiving is new, but the problem it identifies is
> not. The checking for this condition, and the logging, was added so
> that certain kinds of counter corruption would be self-healed
> eventually instead of remaining forever incorrect. Likely nothing is
> wrong that wasn't before; you're just seeing it being logged now.
>
> And I can confirm having seen this on 1.1, so the root cause remains
> unknown as far as I can tell (had previously hoped the root cause were
> thread-unsafe shard merging, or one of the other counter related
> issues fixed during the 0.8 run).
>
> --
> / Peter Schuller (@scode, http://worldmodscode.wordpress.com)

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