Minh Do created CASSANDRA-6619:
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Summary: Race condition during upgrading 1.1 to 1.2
Key: CASSANDRA-6619
URL: https://issues.apache.org/jira/browse/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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