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From Stephan Erb <>
Subject Review Request 59417: Bump logback to 1.2.3 and SLF4J to 1.7.25
Date Fri, 19 May 2017 20:33:39 GMT

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Review request for Aurora, David McLaughlin and Zameer Manji.

Repository: aurora


The changelog entries that stand out the most:

* The ReentrantLock in OutputStreamAppender is now "unfair". In previous
  versions of logback, a fair lock was used. Fair locks are much slower.
  Just as importanly, logback has no mandate to influence thread scheduling.
* In PatternLayoutBase the same StringBuilder is used over and over to
  reduce memory allocation.

I am unable to observe any improvements in our micro-benchmarks. In any
case, I still think it is worth to stay up to date.

Full changelogs:



  build.gradle b7a4f059b6de8acca882f3cd1e881434f4befbfa 



./gradlew -Pq build


Stephan Erb

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