Yang Chen created MAPREDUCE-7361:
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Summary: Clean shared state pollution to avoid flaky tests in
TestTaskProgressReporter
Key: MAPREDUCE-7361
URL: https://issues.apache.org/jira/browse/MAPREDUCE-7361
Project: Hadoop Map/Reduce
Issue Type: Bug
Reporter: Yang Chen
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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