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https://issues.apache.org/jira/browse/MAPREDUCE-7361?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Yang Chen updated MAPREDUCE-7361:
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Attachment: MAPREDUCE-7361.001.patch
> Clean shared state pollution to avoid flaky tests
> -------------------------------------------------
>
> Key: MAPREDUCE-7361
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-7361
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> Components: test
> Reporter: Yang Chen
> Priority: Minor
> Labels: pull-request-available
> Attachments: MAPREDUCE-7361.001.patch
>
> Time Spent: 10m
> Remaining Estimate: 0h
>
> h2. What is the purpose of this change
> This PR is to clean the polluted shared status among the 3 tests:
> {code:java}
> Test1:
> org.apache.hadoop.mapred.TestTaskProgressReporter.testBytesWrittenRespectingLimit
> Test2: org.apache.hadoop.mapred.TestTaskProgressReporter.testScratchDirSize
> Test3:
> org.apache.hadoop.mapred.TestTaskProgressReporter.testTaskProgress{code}
> Test1 and Test2 pollute the shared status with Test3, which can make test3
> fail. It may be better to clean state pollutions so that some other tests
> won't fail in the future due to the shared state polluted by this test.
> h2. Reproduce the test failures
> Run the tests in the same JVM in the following orders:
> * Test1 and Test3
> * Test2 and Test3
> h2. Expected result
> The tests should run successfully when multiple tests that use this shared
> state are run in the same JVM.
> h2. Actual result
> * Run Test1 and Test3, Test3 fails:
> {code:java}
> [ERROR] TestTaskProgressReporter.testTaskProgress:267 expected:<[2]> but
> was:<[3]>{code}
> * Run Test2 and Test3, Test3 fails:
> {code:java}
> [ERROR] TestTaskProgressReporter.testTaskProgress:267 expected:<[2]> but
> was:<[11]>{code}
> h2. Fix
> Clean the value of {{statusUpdateTimes}} to 0 at the start of Test3 to clean
> the pollution from Test1 and Test2.
> Link to PR: https://github.com/apache/hadoop/pull/3298
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