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https://issues.apache.org/jira/browse/HDFS-10723?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15409513#comment-15409513
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Kihwal Lee commented on HDFS-10723:
-----------------------------------
It is more likely that another process grabbed the port. In general it is not a
good idea to hard-core or reuse the same port number in unit tests. We had to
fix a lot of such test cases in the past. The jenkins slave can run multiple
jobs at the same time and also hdfs tests can run in parallel.
> TestRenameWhileOpen tries to restart NN with the same rpc port
> --------------------------------------------------------------
>
> Key: HDFS-10723
> URL: https://issues.apache.org/jira/browse/HDFS-10723
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: test
> Reporter: Kihwal Lee
>
> In {{testWhileOpenRenameParentToNonexistentDir}},
> {code}
> // restart cluster with the same namenode port as before.
> // This ensures that leases are persisted in fsimage.
> cluster.shutdown();
> {code}
> And we are getting test failures in precommit builds.
> {noformat}
> java.net.BindException: Problem binding to [localhost:47395]
> java.net.BindException: Address already in use;
> {noformat}
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