Peter Bacsko created MAPREDUCE-7064:
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Summary: Flaky test TestTaskAttempt#testReducerCustomResourceTypes
Key: MAPREDUCE-7064
URL: https://issues.apache.org/jira/browse/MAPREDUCE-7064
Project: Hadoop Map/Reduce
Issue Type: Bug
Components: client, test
Reporter: Peter Bacsko
Assignee: Peter Bacsko
The test {{TestTaskAttempt#testReducerCustomResourceType}} can occasionally
fail with the following error:
{noformat}
org.apache.hadoop.yarn.exceptions.ResourceNotFoundException: Unknown resource
'a-custom-resource'. Known resources are [name: memory-mb, units: Mi, type:
COUNTABLE, value: 0, minimum allocation: 0, maximum allocation:
9223372036854775807, name: vcores, units: , type: COUNTABLE, value: 0, minimum
allocation: 0, maximum allocation: 9223372036854775807]
at
org.apache.hadoop.mapreduce.v2.app.job.impl.TestTaskAttempt.createReduceTaskAttemptImplForTest(TestTaskAttempt.java:434)
at
org.apache.hadoop.mapreduce.v2.app.job.impl.TestTaskAttempt.testReducerCustomResourceTypes(TestTaskAttempt.java:1535)
{noformat}
The root cause seems to be an interference from previous tests that start
instance(s) of {{FailingAttemptsMRApp}} or
{{FailingAttemptsDuringAssignedMRApp}}. When I disabled these tests,
{{testReducerCustomResourceTypes}} always passed.
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