Joe McDonnell created IMPALA-13229:
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             Summary: Improve logging for TAcceptQueueServer when a thread 
takes a long time in SASL negotiation
                 Key: IMPALA-13229
                 URL: https://issues.apache.org/jira/browse/IMPALA-13229
             Project: IMPALA
          Issue Type: Task
          Components: Backend
    Affects Versions: Impala 4.4.0
            Reporter: Joe McDonnell


In IMPALA-11653, we are concerned about bad clients that use up threads in the 
SASL negotiation thread pool for long periods of time (or eventually hit 
sasl_connect_tcp_timeout_ms).

As a separate task, it would be useful to be able to quickly tell from the logs 
whether a connection spends a lot of time in the SASL negotiation and could be 
creating this type of problem.

We should add some logging to make this issue clear from the logs. One option 
is to log a warning if SASL negotiation takes longer than some threshold (and 
thus was using up a thread during that time). If SASL negotiation is taking 
longer than a few seconds, that can be a real issue.



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