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https://issues.apache.org/jira/browse/HADOOP-13470?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15423527#comment-15423527
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Kihwal Lee commented on HADOOP-13470:
-------------------------------------
{{TestBootstrapStandby}} also started failing after this.
> GenericTestUtils$LogCapturer is flaky
> -------------------------------------
>
> Key: HADOOP-13470
> URL: https://issues.apache.org/jira/browse/HADOOP-13470
> Project: Hadoop Common
> Issue Type: Bug
> Components: test, util
> Affects Versions: 2.8.0
> Reporter: Mingliang Liu
> Assignee: Mingliang Liu
> Labels: reviewed
> Fix For: 2.8.0
>
> Attachments: HADOOP-13470.000.patch, HADOOP-13470.001.patch
>
>
> {{GenericTestUtils$LogCapturer}} is useful for assertions against service
> logs. However it should be fixed in following aspects:
> # In the constructor, it uses the stdout appender's layout.
> {code}
> Layout layout = Logger.getRootLogger().getAppender("stdout").getLayout();
> {code}
> However, the stdout appender may be named "console" or alike which makes the
> constructor throw NPE. Actually the layout does not matter and we can use a
> default pattern layout that only captures application logs.
> # {{stopCapturing()}} method is not working. The major reason is that the
> {{appender}} internal variable is never assigned and thus removing it to stop
> capturing makes no sense.
> # It does not support {{org.slf4j.Logger}} which is preferred to log4j in
> many modules.
> # There is no unit test for it.
> This jira is to address these.
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