[IMPALA-12482] StatestoreSubscriber.UpdateState logging is too noisy at VLOG level 2

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: Impala 4.3.0
• Fix Version/s: Impala 4.4.0
• Component/s: Backend
• Target Version: Impala 4.4.0
• Epic Color: ghx-label-8
• Assignee: Riza Suminto
• Reporter: Riza Suminto
• Created: 05/Oct/23 16:25
• Updated: 18/Oct/23 01:54
• Resolved: 18/Oct/23 01:54

Description

StatestoreSubscriber.UpdateState is a periodic RPC that happens every 1 second. This RPC is wrapped with RpcEventHandler (rpc-trace.cc) which has VLOG_RPC (or VLOG(2)) in it.

Debugging Impalad by lowering VLOG level from 1 to 2 has been difficult due to noise from this StatestoreSubscriber.UpdateState RPC. Following lines will be printed to Impalad logs, burying other log lines that is actually more important:

I0926 15:54:15.255978   829 rpc-trace.cc:256] RPC call: statestore-subscriber:StatestoreSubscriber.UpdateState from 127.0.0.6:41953 took 123.000us
I0926 15:54:15.356801   848 rpc-trace.cc:236] RPC call: StatestoreSubscriber.UpdateState(from 127.0.0.6:35361) 

RpcEventHandler should be modified to allow different VLOG level for different RPC handler.