[jira] [Created] (CASSANDRA-9451) Startup message response for unsupported protocol versions is incorrect

["Jorge Bay (JIRA)" <ji...@apache.org>]

Jorge Bay created CASSANDRA-9451:
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             Summary: Startup message response for unsupported protocol versions is incorrect
                 Key: CASSANDRA-9451
                 URL: https://issues.apache.org/jira/browse/CASSANDRA-9451
             Project: Cassandra
          Issue Type: Bug
         Environment: OS X 10.9
Cassandra 2.1.5 
            Reporter: Jorge Bay


The response to a STARTUP request with protocol v4 on a C* 2.1 host is an error with an incorrect error code (0). 

Instead of the error code being "Protocol error" ({{0x000A}}) it has error code 0 and message (wrapped by netty): 
{{"io.netty.handler.codec.DecoderException: org.apache.cassandra.transport.ProtocolException: Invalid or unsupported protocol version: 4"}}



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