[HDFS-9049] Make Datanode Netty reverse proxy port to be configurable

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 3.1.0, 2.10.0, 2.9.1, 3.0.1, 2.8.4
• Component/s: datanode
• Hadoop Flags: Reviewed
• Assignee: Vinayakumar B
• Reporter: Vinayakumar B
• Created: 10/Sep/15 18:44
• Updated: 18/Jan/18 05:35
• Resolved: 17/Jan/18 09:00

Description

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.

 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);

Issue Links

• is duplicated by: HDFS-9495 Data node opens random port for HTTPServer, not configurable