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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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Summary: Clean shared state pollution to avoid flaky tests (was: Clean
shared state pollution to avoid flaky tests in TestTaskProgressReporter)
> 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
> Reporter: Yang Chen
> Priority: Minor
>
> h2. What is the purpose of this change
> This PR is to fix a non-idempotent test
> {code:java}
> org.apache.hadoop.mapred.TestTaskProgressReporter.testTaskProgress{code}
> h2. Why the test failed
> The root cause for the failure is that this test does not reset
> {{statusUpdateTimes}} at the end, which pollutes the shared state. 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 test failure
> Run the test twice in the same JVM.
> h2. Expected result
> The test should pass without any failure 2 times.
> h2. Actual result
> Get failures:
> {code:java}
> [ERROR] Failures:
> [ERROR] TestTaskProgressReporter.testTaskProgress:267 expected:<[2]> but
> was:<[4]>{code}
> h2. Fix
> Reset the value of {{statusUpdateTimes}} to 0 at the end of the test.
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