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https://issues.apache.org/jira/browse/HADOOP-11045?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14303542#comment-14303542
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Hudson commented on HADOOP-11045:
---------------------------------
FAILURE: Integrated in Hadoop-trunk-Commit #6987 (See
[https://builds.apache.org/job/Hadoop-trunk-Commit/6987/])
HADOOP-11045. Introducing a tool to detect flaky tests of hadoop jenkins
testing job. Contributed by Yongjun Zhang and Todd Lipcon. (ozawa: rev
80705e034b7fc7ad384f1aa0bd15fc254ea06cf0)
* dev-support/determine-flaky-tests-hadoop.py
* hadoop-common-project/hadoop-common/CHANGES.txt
> Introducing a tool to detect flaky tests of hadoop jenkins test job
> -------------------------------------------------------------------
>
> Key: HADOOP-11045
> URL: https://issues.apache.org/jira/browse/HADOOP-11045
> Project: Hadoop Common
> Issue Type: Improvement
> Components: build, tools
> Affects Versions: 2.5.0, 2.6.0
> Reporter: Yongjun Zhang
> Assignee: Yongjun Zhang
> Attachments: HADOOP-11045.001.patch, HADOOP-11045.002.patch,
> HADOOP-11045.003.patch, HADOOP-11045.004.patch, HADOOP-11045.005.patch,
> HADOOP-11045.006.patch, HADOOP-11045.007.patch
>
>
> File this jira to introduce a tool to detect flaky tests of hadoop jenkins
> test jobs. Certainly it can be adapted to projects other than hadoop.
> I developed the tool on top of some initial work [~tlipcon] did. We find it
> quite useful. With Todd's agreement, I'd like to push it to upstream so all
> of us can share (thanks Todd for the initial work and support). I hope you
> find the tool useful too.
> The idea is, when one has the need to see if the test failure s/he is seeing
> in a pre-build jenkins run is flaky or not, s/he could run this tool to get a
> good idea. Also, if one wants to look at the failure trend of a testcase in a
> given jenkins job, the tool can be used too. I hope people find it useful.
> This tool is for hadoop contributors rather than hadoop users. Thanks
> [~tedyu] for the advice to put to dev-support dir.
> Description of the tool:
> {code}
> #
> # Given a jenkins test job, this script examines all runs of the job done
> # within specified period of time (number of days prior to the execution
> # time of this script), and reports all failed tests.
> #
> # The output of this script includes a section for each run that has failed
> # tests, with each failed test name listed.
> #
> # More importantly, at the end, it outputs a summary section to list all
> failed
> # tests within all examined runs, and indicate how many runs a same test
> # failed, and sorted all failed tests by how many runs each test failed in.
> #
> # This way, when we see failed tests in PreCommit build, we can quickly tell
> # whether a failed test is a new failure or it failed before, and it may just
> # be a flaky test.
> #
> # Of course, to be 100% sure about the reason of a failed test, closer look
> # at the failed test for the specific run is necessary.
> #
> {code}
> How to use the tool:
> {code}
> Usage: determine-flaky-tests-hadoop.py [options]
> Options:
> -h, --help show this help message and exit
> -J JENKINS_URL, --jenkins-url=JENKINS_URL
> Jenkins URL
> -j JOB_NAME, --job-name=JOB_NAME
> Job name to look at
> -n NUM_PREV_DAYS, --num-days=NUM_PREV_DAYS
> Number of days to examine
> {code}
> Example command line:
> {code}
> ./determine-flaky-tests-hadoop.py -J https://builds.apache.org -j
> PreCommit-HDFS-Build -n 2
> {code}
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