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From "Minh Do (JIRA)" <>
Subject [jira] [Created] (CASSANDRA-6702) Upgrading node uses the wrong port in gossiping
Date Thu, 13 Feb 2014 23:18:22 GMT
Minh Do created CASSANDRA-6702:

             Summary: Upgrading node uses the wrong port in gossiping
                 Key: CASSANDRA-6702
             Project: Cassandra
          Issue Type: Bug
          Components: Core
         Environment: 1.1.7, AWS, Ec2MultiRegionSnitch
            Reporter: Minh Do
            Priority: Minor
             Fix For: 1.2.15

When upgrading a node in 1.1.7 (or 1.1.11) cluster to 1.2.15 and inspecting the gossip information
on port/Ip, I could see that the upgrading node (1.2 version) communicates to one other node
in the same region using Public IP and non-encrypted port.

For the rest, the upgrading node uses the correct ports and IPs to communicate in this manner:
   Same region: private IP and non-encrypted port 
   Different region: public IP and encrypted port

Because there is one node like this (or probably 2 max), we have to modify Security Group
to allow the new traffics.

Without modifying the SG, the 95th and 99th latencies for both reads and writes in the cluster
are very bad (due to RPC timeout).  Inspecting closer, that upgraded node (1.2 node) is contributing
to all of the high latencies whenever it acts as a coordinator node. 


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