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https://issues.apache.org/jira/browse/HDFS-12990?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16354638#comment-16354638
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Hudson commented on HDFS-12990:
-------------------------------
SUCCESS: Integrated in Jenkins build Hadoop-trunk-Commit #13621 (See
[https://builds.apache.org/job/Hadoop-trunk-Commit/13621/])
HDFS-12990. Change default NameNode RPC port back to 8020. Contributed
(aengineer: rev 4304fcd5bdf9fb7aa9181e866eea383f89bf171f)
* (edit)
hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/util/GenericOptionsParser.java
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hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/ha/TestSshFenceByTcpPort.java
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hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/TestDFSUtil.java
* (edit) hadoop-tools/hadoop-openstack/src/site/markdown/index.md
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hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/TestAllowFormat.java
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hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/blockmanagement/TestBlockTokenWithDFS.java
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hadoop-hdfs-project/hadoop-hdfs-client/src/test/java/org/apache/hadoop/hdfs/server/namenode/ha/TestRequestHedgingProxyProvider.java
* (edit) hadoop-hdfs-project/hadoop-hdfs/src/main/resources/hdfs-default.xml
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hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-hs/src/test/resources/job_0.23.9-FAILED.jhist
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hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/datanode/TestBlockPoolManager.java
* (edit) hadoop-tools/hadoop-sls/src/main/data/2jobs2min-rumen-jh.json
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hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/CommonConfigurationKeys.java
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hadoop-tools/hadoop-distcp/src/test/java/org/apache/hadoop/tools/TestOptionsParser.java
* (edit) hadoop-hdfs-project/hadoop-hdfs/src/site/markdown/ViewFs.md
* (edit) hadoop-hdfs-project/hadoop-hdfs/src/site/markdown/HdfsDesign.md
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hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/tools/TestGetConf.java
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hadoop-hdfs-project/hadoop-hdfs-client/src/main/java/org/apache/hadoop/hdfs/client/HdfsClientConfigKeys.java
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hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/src/test/java/org/apache/hadoop/yarn/server/nodemanager/api/protocolrecords/impl/pb/TestPBRecordImpl.java
* (edit) hadoop-tools/hadoop-distcp/src/site/markdown/DistCp.md.vm
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hadoop-yarn-project/hadoop-yarn/hadoop-yarn-registry/src/test/java/org/apache/hadoop/registry/RegistryTestHelper.java
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hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/TestDFSClientFailover.java
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hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/blockmanagement/TestBlockTokenWithDFSStriped.java
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hadoop-hdfs-project/hadoop-hdfs/src/site/markdown/HDFSHighAvailabilityWithNFS.md
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hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/TestQuota.java
* (edit)
hadoop-hdfs-project/hadoop-hdfs/src/site/markdown/HDFSHighAvailabilityWithQJM.md
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hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/fs/TestDelegateToFileSystem.java
> Change default NameNode RPC port back to 8020
> ---------------------------------------------
>
> Key: HDFS-12990
> URL: https://issues.apache.org/jira/browse/HDFS-12990
> Project: Hadoop HDFS
> Issue Type: Task
> Components: namenode
> Affects Versions: 3.0.0
> Reporter: Xiao Chen
> Assignee: Xiao Chen
> Priority: Critical
> Fix For: 3.0.1
>
> Attachments: HDFS-12990.01.patch
>
>
> In HDFS-9427 (HDFS should not default to ephemeral ports), we changed all
> default ports to ephemeral ports, which is very appreciated by admin. As part
> of that change, we also modified the NN RPC port from the famous 8020 to
> 9820, to be closer to other ports changed there.
> With more integration going on, it appears that all the other ephemeral port
> changes are fine, but the NN RPC port change is painful for downstream on
> migrating to Hadoop 3. Some examples include:
> # Hive table locations pointing to hdfs://nn:port/dir
> # Downstream minicluster unit tests that assumed 8020
> # Oozie workflows / downstream scripts that used 8020
> This isn't a problem for HA URLs, since that does not include the port
> number. But considering the downstream impact, instead of requiring all of
> them change their stuff, it would be a way better experience to leave the NN
> port unchanged. This will benefit Hadoop 3 adoption and ease unnecessary
> upgrade burdens.
> It is of course incompatible, but giving 3.0.0 is just out, IMO it worths to
> switch the port back.
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