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https://issues.apache.org/jira/browse/MAPREDUCE-7475?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Ayush Saxena updated MAPREDUCE-7475:
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Summary: Fix non-idempotent unit tests (was: 2 tests are non-idempotent
(passes in the first run but fails in repeated runs in the same JVM))
> Fix non-idempotent unit tests
> -----------------------------
>
> Key: MAPREDUCE-7475
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-7475
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> Components: test
> Affects Versions: 3.4.0
> Environment: Ubuntu 22.04, Java 17
> Reporter: Kaiyao Ke
> Assignee: Kaiyao Ke
> Priority: Minor
> Labels: pull-request-available
> Fix For: 3.5.0, 3.4.1
>
> Original Estimate: 10m
> Remaining Estimate: 10m
>
> 2 tests are not idempotent and fails upon repeated execution within the same
> JVM instance due to self-induced state pollution. Specifically, these tests
> try to make the directory TEST_ROOT_DIR and write to it. The tests do not
> clean up (remove) the directory after execution. Therefore, in the second
> execution, TEST_ROOT_DIR would already exist and the exception `Could not
> create test dir` would be thrown. Below are the 2 non-idempotent tests:
> * org.apache.hadoop.mapred.TestOldCombinerGrouping.testCombiner
> * org.apache.hadoop.mapreduce.TestNewCombinerGrouping.testCombiner
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