Zhengxi Li created MAPREDUCE-7342:
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Summary: Non-idempotent test in TestClientRedirect
Key: MAPREDUCE-7342
URL: https://issues.apache.org/jira/browse/MAPREDUCE-7342
Project: Hadoop Map/Reduce
Issue Type: Test
Reporter: Zhengxi Li
Assignee: Zhengxi Li
The test *{{*org.apache.hadoop.mapred.TestClientRedirect.testRedirect*}}* is
not idempotent and fail if run twice in the same JVM, because it pollutes some
states shared among tests. It may be good to clean this state pollution so that
some other tests do not fail in the future due to the shared state polluted by
this test.
h3. Detail
Running *{{TestClientRedirect.testRedirect}}* twice would result in the second
run failing due to the following assertion error:
{noformat}
INFO [main] service.AbstractService (AbstractService.java:noteFailure(267)) -
Service test failed in state STARTED
org.apache.hadoop.yarn.exceptions.YarnRuntimeException: java.net.BindException:
Problem binding to [0.0.0.0:8054] java.net.BindException: Address already in use
{noformat}
The root cause is that the RM server listening on port 8054) is started in the
first run of this test, but hasn't been stopped when the test finishes. In the
second run, when the test is trying to start the RMService, it fails because
port 8054 is already in use, leading to the exception.
PR link: [TBD]
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