Ahmed Hussein created HADOOP-17769:
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Summary: Upgrade JUnit to 4.13.2
Key: HADOOP-17769
URL: https://issues.apache.org/jira/browse/HADOOP-17769
Project: Hadoop Common
Issue Type: Bug
Reporter: Ahmed Hussein
Assignee: Ahmed Hussein
JUnit 4.13.1 has a bug that is reported in Junit
[issue-1652|https://github.com/junit-team/junit4/issues/1652] _Timeout
ThreadGroups should not be destroyed_
After upgrading Junit to 4.13.1 in HADOOP-17602, {{TestBlockRecovery}} started
to fail regularly in branch-3.x and branch-2.10.
While investigating the failure in branch-2.10 HDFS-16072, I found out that the
bug is the main reason {{TestBlockRecovery}} started to fail because the
timeout of the Junit would try to close a ThreadGroup that has been already
closed which throws the {{java.lang.IllegalThreadStateException}}.
The bug has been fixed in Junit-4.13.2
For branch-3.x, HDFS-15940 did not address the root cause of the problem.
Eventually, Splitting the {{TestBlockRecovery}} hid the bug, but the upgrade
needs to be done so that the problem does not show up in another unit test.
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