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From "Minh Do (JIRA)" <>
Subject [jira] [Created] (CASSANDRA-6619) Race condition during upgrading 1.1 to 1.2
Date Sat, 25 Jan 2014 11:21:37 GMT
Minh Do created CASSANDRA-6619:

             Summary: Race condition during upgrading 1.1 to 1.2
                 Key: CASSANDRA-6619
             Project: Cassandra
          Issue Type: Bug
          Components: Core
            Reporter: Minh Do
            Assignee: Minh Do
            Priority: Minor
             Fix For: 1.2.14

There was a race condition during upgrading a C* 1.1x cluster to C* 1.2.
One issue is that OutboundTCPConnection can't establish from a 1.2 node to some 1.1x nodes.
 Because of this, a live cluster during the upgrading will suffer in high read latency and
be unable to fulfill some write requests.  It won't be a problem if there is a small cluster
but it is a problem in a large cluster because the upgrading process takes 10+ hours to 1+
days to complete.

Acknowledging about CASSANDRA-5692, however, it is not fully fixed.  We already have a patch
for this and will attach shortly to let the community to review.

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