[ISSUE #603] Print full stack trace when an error occurs in consuming messages

[ssssssnake]

What is the purpose of the change

Print full stack trace when an error occurs in consuming messages. #603

Brief changelog

Full stack trace will be printed when an error occurs in consuming messages.

Verifying this change

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[coveralls]

Coverage increased (+0.04%) to 49.388% when pulling 2fe054c on ssssssnake:master into a83c621 on apache:develop.