[jira] [Created] (IMPALA-8914) Collect and publish QueryEventHook metrics

["radford nguyen (Jira)" <ji...@apache.org>]

radford nguyen created IMPALA-8914:
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             Summary: Collect and publish QueryEventHook metrics
                 Key: IMPALA-8914
                 URL: https://issues.apache.org/jira/browse/IMPALA-8914
             Project: IMPALA
          Issue Type: Improvement
          Components: Backend, Frontend
            Reporter: radford nguyen


Metrics around {{QueryEventHook}} execution are currently not captured.  It would help debug/diagnosis to capture such metrics as:
 * # of times hook execution has been rejected (due to full work queue)
 * # of times hook execution has timed out
 * # of times hook execution has exceptioned
 * # of times hook execution has been requested
 * avg time hook execution has spent queued up
 * avg time hook execution has taken to execute

All metrics above should be further qualified by the hook implementation class.  The following naming convention is suggested (in respective order):
 * query-event-hook.${hook}.num-execution-rejections
 * query-event-hook.${hook}.num-execution-timeouts
 * query-event-hook.${hook}.num-execution-exceptions
 * query-event-hook.${hook}.num-execution-submissions
 * query-event-hook.${hook}.mean-queued-time
 * query-event-hook.${hook}.mean-execution-time

where ${hook} is the fully-qualified method name of the hook method, e.g. com.acme.impala.hooks.MyImpalaHook.onQueryComplete



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