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From "Jeff Liu (JIRA)" <j...@apache.org>
Subject [jira] [Created] (CASSANDRA-10714) tcp retransmission issue seen in cassandra cluster
Date Mon, 16 Nov 2015 20:04:10 GMT
Jeff Liu created CASSANDRA-10714:
------------------------------------

             Summary: tcp retransmission issue seen in cassandra cluster
                 Key: CASSANDRA-10714
                 URL: https://issues.apache.org/jira/browse/CASSANDRA-10714
             Project: Cassandra
          Issue Type: Improvement
          Components: Streaming and Messaging
            Reporter: Jeff Liu


I have been seen tcp package retransmission issue in various stacks in our environment. (
AWS with no VPC). I'm currently using hsha rpc server type on cassandra 2.1.6 version. The
information captured by wireshark shows that the retransmission happened both between client-to-server
and server-to-server. Even within a cluster that doesn't have any client traffic, sporadic
retransmission still happens.

It's pretty easy to reproduce this issue by watching "netstat -s | grep retrans". 



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