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From Zameer Manji <>
Subject Re: Review Request 42845: Enable H2 logging to slf4j.
Date Wed, 27 Jan 2016 21:38:40 GMT

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(Updated Jan. 27, 2016, 1:38 p.m.)

Review request for Aurora, Maxim Khutornenko and Bill Farner.


Bill's feedback.

Repository: aurora


On a test cluster with DbTaskStore enabled there are several lines in the log that look like:
2016-01-26 13:07:14 jdbc[15]: exception
There is no other information with these lines. This is a result of setting `TRACE_LEVEL_SYSTEM_OUT`
to `1` for H2. This will print out the error message but not the associated throwable:

The SLF4J implementation of tracing in H2 does not suffer from this restriction.

Diffs (updated)

  src/main/java/org/apache/aurora/scheduler/storage/db/ 36c462ac86cc605bd86bfc31c2f962a315099a02

  src/main/resources/logback.xml faf0dbc94dea536a944be18810a7f330d4c94dee 



Set the level to debug initially and observed extra output in Vagrant.


Zameer Manji

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