[CASSANDRA-13456] Needs better logging for timeout/failures

• Type: Improvement
• Status: Open
• Priority: Normal
• Resolution: Unresolved
• Component/s: Legacy/Observability
• Assignee: Unassigned
• Reporter: Fuud
• Created: 18/Apr/17 11:34
• Updated: 16/Apr/19 09:30

Description

When read was failed due to timeout, Cassandra reports in logs "Timeout; reveived 1 of 3 responses". Same information is passed to clients.

But this information is not enoght to get list of slow nodes.

Better to have detailed message in debug log:
"Timeout; reveived 1 of 4 responses. Requested but not responded node: [<ip1>, <ip2>], Failed nodes: [<ip3>]"

I implemented such behavior by patching ReadCallback, AbstractWriteResponseHandler, DatacenterSyncWriteResponseHandler and WriteResponseHandler. It handles all cases except Paxos.

But I want to implement solid solution that handle all cases in same way.

But before I will start I want to know: are there any objections against such logging?