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https://issues.apache.org/jira/browse/HDFS-9049?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14739352#comment-14739352
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Haohui Mai commented on HDFS-9049:
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Why does it need to be configurable? How does it benefit deployment?
It's by design to avoid port conflicts.
> Make Datanode Netty reverse proxy port to be configurable
> ---------------------------------------------------------
>
> Key: HDFS-9049
> URL: https://issues.apache.org/jira/browse/HDFS-9049
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: datanode
> Reporter: Vinayakumar B
> Assignee: Vinayakumar B
>
> In DatanodeHttpServer.java Netty is used as reverse proxy. But uses random
> port to start with binding to localhost. This port can be made configurable
> for better deployments.
> {code}
> HttpServer2.Builder builder = new HttpServer2.Builder()
> .setName("datanode")
> .setConf(confForInfoServer)
> .setACL(new AccessControlList(conf.get(DFS_ADMIN, " ")))
> .hostName(getHostnameForSpnegoPrincipal(confForInfoServer))
> .addEndpoint(URI.create("http://localhost:0";))
> .setFindPort(true);
> {code}
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