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Improve exception handling in persist_event #2834
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1. use `deferred.errback()` instead of `deferred.errback(e)`, which means that a Failure object will be constructed using the current exception state, *including* its stack trace - so the stack trace is saved in the Failure, leading to better exception reports. 2. Set `consumeErrors=True` on the ObservableDeferred, because we know that there will always be at least one observer - which avoids a spurious "CRITICAL: unhandled exception in Deferred" error in the logs
erikjohnston
approved these changes
Jan 31, 2018
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use
deferred.errback()instead ofdeferred.errback(e), which means thata Failure object will be constructed using the current exception state,
including its stack trace - so the stack trace is saved in the Failure,
leading to better exception reports.
Set
consumeErrors=Trueon the ObservableDeferred, because we know thatthere will always be at least one observer - which avoids a spurious "CRITICAL:
unhandled exception in Deferred" error in the logs