Jing Zhao created HDFS-6062:
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Summary: TestRetryCacheWithHA#testConcat is flaky
Key: HDFS-6062
URL: https://issues.apache.org/jira/browse/HDFS-6062
Project: Hadoop HDFS
Issue Type: Bug
Reporter: Jing Zhao
Assignee: Jing Zhao
Priority: Minor
Attachments: HDFS-6062.000.patch
After adding retry cache metrics check, TestRetryCacheWithHA#testConcat can
fail (https://builds.apache.org/job/PreCommit-HDFS-Build/6313//testReport/).
The reason is that the test uses "dfs.exists(targetPath)" to check whether
concat has been done in the original active NN. However, since we create the
target file in the beginning, the check always returns true. Thus it is
possible that the concat is processed in the new active NN for the first time.
And in this case the retry cache will not be hit.
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