Here is an example of the increase for some counter (counting events per hour)

time (UTC) 0 1 2 3 4 5 6 7 8 9 10 11 12 13
Good value       88 44 26 35 26 86 187 251 455 389 473 367 453 373
C* counter   149 82 45 68 38 146 329 414 746 566 473 377 453 373

I finished my Cassandra 1.1.6 upgrades at 9:30 UTC.

I found wrong values since the day before at 20:00 UTC (counters from hours before are good)

Here are the logs from the output:
Server 1: http://pastebin.com/WyCm6Ef5 (This one is from the same server as the first bash history on my first mail)
Server 2: http://pastebin.com/gBe2KL2b  (This one is from the same server as the second bash history on my first mail)

Alain

2012/11/15 aaron morton <aaron@thelastpickle.com>
Can you provide an example of the increase ? 

Can you provide the log from startup ?

Cheers

-----------------
Aaron Morton
Freelance Cassandra Developer
New Zealand

@aaronmorton

On 16/11/2012, at 3:21 AM, Alain RODRIGUEZ <arodrime@gmail.com> wrote:

We had an issue with counters over-counting even using the nodetool drain command before upgrading...

Here is my bash history

   69  cp /etc/cassandra/cassandra.yaml /etc/cassandra/cassandra.yaml.bak
   70  cp /etc/cassandra/cassandra-env.sh /etc/cassandra/cassandra-env.sh.bak
   71  sudo apt-get install cassandra
   72  nodetool disablethrift
   73  nodetool drain
   74  service cassandra stop
   75  cat /etc/cassandra/cassandra-env.sh /etc/cassandra/cassandra-env.sh.bak
   76  vim /etc/cassandra/cassandra-env.sh
   77  cat /etc/cassandra/cassandra.yaml /etc/cassandra/cassandra.yaml.bak
   78  vim /etc/cassandra/cassandra.yaml
   79  service cassandra start


I merged my conf files with an external tool so consider I merged my conf files on steps 76 and 78.

I saw that the "sudo apt-get install cassandra" stop the server and restart it automatically. So it updated without draining and restart before I had the time to reconfigure the conf files. Is this "normal" ? Is there a way to avoid it ?

So for the second node I decided to try to stop C*before the upgrade.

  125  cp /etc/cassandra/cassandra.yaml /etc/cassandra/cassandra.yaml.bak
  126  cp /etc/cassandra/cassandra-env.sh /etc/cassandra/cassandra-env.sh.bak
  127  nodetool disablegossip
  128  nodetool disablethrift
  129  nodetool drain
  130  service cassandra stop
  131  sudo apt-get install cassandra

//131 : This restarted cassandra

  132  nodetool disablethrift
  133  nodetool disablegossip
  134  nodetool drain
  135  service cassandra stop
  136  cat /etc/cassandra/cassandra-env.sh /etc/cassandra/cassandra-env.sh.bak
  137  cim /etc/cassandra/cassandra-env.sh
  138  vim /etc/cassandra/cassandra-env.sh
  139  cat /etc/cassandra/cassandra.yaml /etc/cassandra/cassandra.yaml.bak
  140  vim /etc/cassandra/cassandra.yaml
  141  service cassandra start

After both of these updates I saw my current counters increase without any reason.

Did I do anything wrong ?

Alain