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From "Devaraj Das (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-4744) Wrong resolution of hostname and port
Date Fri, 12 Dec 2008 19:39:44 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-4744?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12656125#action_12656125
] 

Devaraj Das commented on HADOOP-4744:
-------------------------------------

Just to clarify things. The sequeunce of calls that are made are (details in src/core/org/apache/hadoop/http/HttpServer.java)
listed below. Please see if something is missing or is incorrect in the sequence below.

{code}

    Server webServer = new org.mortbay.jetty.Server();

    Connector listener = new SelectChannelConnector();

    listener.setLowResourceMaxIdleTime(10000);
    listener.setAcceptQueueSize(128);
    listener.setResolveNames(false);
    listener.setUseDirectBuffers(false);
    listener.setHost(bindAddress);
    listener.setPort(port); //THE PORT PASSED IS 0

    webServer.addConnector(listener);
   //other webServer initialization follows...
   //...

   webServer.start();

   port = webServer.getConnectors()[0].getLocalPort(); //CAN THIS RETURN -1

{code}

> Wrong resolution of hostname and port 
> --------------------------------------
>
>                 Key: HADOOP-4744
>                 URL: https://issues.apache.org/jira/browse/HADOOP-4744
>             Project: Hadoop Core
>          Issue Type: Bug
>          Components: mapred
>    Affects Versions: 0.20.0
>            Reporter: Amareshwari Sriramadasu
>            Priority: Blocker
>             Fix For: 0.20.0
>
>
> I noticed the following for one of the hosts in a cluster:
> 1. machines.jsp page resolves the http address as just "http://hostname" (which doesn't
work). It doesnt put the port number for the host. Even if I add the port number manually
in the URI, the  task tracker page does not come up. 
> 2. All the tasks(both maps and reduces) which ran on the machine ran successfully. But
tasklogs cannot be viewed, because port-number is not resolved. ( same problem as in (1)).
> 3. The reducers waiting for maps ran on that machine fail with connection failed errors
saying the hostname is 'null'.

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