[CASSANDRA-7236] Extend connection backlog for MessageService

• Type: Improvement
• Status: Resolved
• Priority: Normal
• Resolution: Fixed
• Fix Version/s: 2.0.9, 2.1 rc2
• Assignee: Oleg Anastasyev
• Reporter: Oleg Anastasyev

Authors

Oleg Anastasyev

Reviewers

Brandon Williams

• Created: 14/May/14 21:33
• Updated: 16/Apr/19 09:31
• Resolved: 18/Jun/14 18:34

Description

On restart of a node, which is part of a large cluster (500+ nodes) a lot of connection timeouts occur and a lot of messages in kernel log like

 kernel: TCP: Possible SYN flooding on port 7000. Sending cookies.

and like

 kernel: net_ratelimit: 232 callbacks suppressed

found that MessageService use default backlog for its serversocket (which is 50 for java)

This patch extends connection backlog to 500.