[CASSANDRA-9451] Startup message response for unsupported protocol versions is incorrect

• Type: Bug
• Status: Resolved
• Priority: Normal
• Resolution: Fixed
• Fix Version/s: 2.1.6, 2.2.0 rc1
• Component/s: Legacy/CQL

Environment

OS X 10.9
Cassandra 2.1.5

• Severity: Normal
• Impacts: Clients
• Assignee: Stefania Alborghetti
• Reporter: Jorge Bay

Authors

Stefania Alborghetti

Reviewers

Stefania Alborghetti

• Created: 21/May/15 14:07
• Updated: 06/Nov/19 21:58
• Resolved: 19/Oct/15 08:44

Description

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"