GitHub user guozhangwang opened a pull request:
https://github.com/apache/kafka/pull/3354
KAFKA-4829: Improve log4j on Streams thread / task-level
These are the following improvements I made:
1. On stream thread level, INFO will be demonstrating `Completed xx tasks
in yy ms` or `Completed rebalance with xx state in yy ms`,
2. On Stream thread cache level, INFO on `Flushed xx records`.
3. On Stream thread level, DEBUG on internal batched operations like
`created xx tasks`, and TRACE on individual operation like `created x task`.
4. Also using `isTraceEnabled` on the critical path to reduce overhead of
creating `Object[]`.
5. Minor cleanups in the code.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/guozhangwang/kafka K4829-tasks-log4j
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/kafka/pull/3354.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #3354
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commit 00459c20ae097b9da86ba15ed1511ab3f39c9830
Author: Guozhang Wang <wangg...@gmail.com>
Date: 2017-06-16T00:16:20Z
improve log4j levels
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