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https://issues.apache.org/jira/browse/S2GRAPH-117?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15561652#comment-15561652
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ASF GitHub Bot commented on S2GRAPH-117:
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Github user SteamShon commented on the issue:
https://github.com/apache/incubator-s2graph/pull/88
@jongwook
Thanks for hard work. big +1 on upgrade play version to 2.5.9.
Also +1 on moving all test cases in s2rest_play into s2core.
Thanks for sharing your knowledge on logging framework in java general.
> Cleaner logging library usage
> -----------------------------
>
> Key: S2GRAPH-117
> URL: https://issues.apache.org/jira/browse/S2GRAPH-117
> Project: S2Graph
> Issue Type: Improvement
> Reporter: Jong Wook Kim
> Fix For: 0.1.0
>
> Original Estimate: 336h
> Remaining Estimate: 336h
>
> Our SBT project is currently dependent on both log4j and logback, while using
> two logging backends is not ideal.
> Furthermore, there has been report that in some configuration we have both
> slf4j-log4j12 and log4j-over-slf4j in the classpath which leads to
> StackOverflowError.
> The current codebase is not written with a clean usage of logging library in
> mind, and I propose the following improvements to make our logging usage
> conform with the de-facto standard of slf4j.
> - Figure out how the dependencies are using slf4j, log4j, and logback.
> - Use slf4j-api everywhere, named with the fully qualified class names.
> - Exclude slf4j backends from the library projects
> - Add either log4j or logback backends to the application projects,
> preferably log4j.
> - Add a test case checking that the classpath has the correct configuration
> of jars.
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