[Model Monitoring] Fix event error message in monitoring stream graph #3639
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A fix for https://jira.iguazeng.com/browse/ML-3791.
When there is an error in the event dictionary, the monitoring stream graph returns
None
instead of raising an exception with the related error information. As a result, instead of getting the correct error information, the monitoring stream pod raise an error fromStorey
that can't handle aNone
event object.In this PR we fix this issue and raise the correct error event description instead of returning a
None
object. Therefore, storey will push the right error message to the error stream and the monitoring stream will log the right error message as expected.