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We'll make a change to the onCompletion handler in RecordCollectorImpl to execute the handle method in its ProductionExceptionHandler and only record the exception in sendException if handle returns CONTINUE. We'll ensure that the RecordCollectorImpl always logs when it processes a response from a ProductionExceptionHandler - logging the current error message at ERROR level when instructed to FAIL and logging a comparable error message a WARN level when instructed to CONTINUE. This ensures that it's not possible for a client developer to ship code that totally swallows errors without presenting any kind of activity in the log.

These changes will facilitate a number of error handling scenarios. For example, one could choose to write an interface that always fails, but does some additional logging in the process:

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