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Review request for Aurora, Maxim Khutornenko and Bill Farner. Repository: aurora Description ------- 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: https://github.com/h2database/h2database/blob/a932268843ac84c7a665e427167ff2eb291d6b8e/h2/src/main/org/h2/message/TraceSystem.java#L228 The SLF4J implementation of tracing in H2 does not suffer from this restriction. Diffs ----- src/main/java/org/apache/aurora/scheduler/storage/db/DbModule.java 36c462ac86cc605bd86bfc31c2f962a315099a02 src/main/resources/logback.xml faf0dbc94dea536a944be18810a7f330d4c94dee Diff: https://reviews.apache.org/r/42845/diff/ Testing ------- Set the level to debug initially and observed extra output in Vagrant. Thanks, Zameer Manji
