Github user kr-arjun commented on the issue: https://github.com/apache/drill/pull/1011 @paul-rogers The client error message changes look good. I did quick test with client error message changes and could verify that error message are logged. > Where you using the start command?" Yes, I was trying to start DoY in YARN environment with timeline server enabled. It failed to start Drill application master due to timeline client related error. Since it failed within DOY client process, there were no stack trace available. Attaching test scenarios of the changes for your reference. [DOY-client-error-logging.txt](https://github.com/apache/drill/files/1778349/DOY-client-error-logging.txt)
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