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      The standby RM's webui tries to do a redirect via meta-refresh. That is fine for pages designed to be viewed by web browsers. But the API endpoints shouldn't do that. Most programmatic HTTP clients do not do meta-refresh. I'd suggest HTTP 303, or return a well-defined error message (json or xml) stating that the standby status and a link to the active RM.

      The standby RM is returning this today:

      $ curl -i http://bcsec-1.ent.cloudera.com:8088/ws/v1/cluster/metrics
      HTTP/1.1 200 OK
      Cache-Control: no-cache
      Expires: Thu, 25 Sep 2014 18:34:53 GMT
      Date: Thu, 25 Sep 2014 18:34:53 GMT
      Pragma: no-cache
      Expires: Thu, 25 Sep 2014 18:34:53 GMT
      Date: Thu, 25 Sep 2014 18:34:53 GMT
      Pragma: no-cache
      Content-Type: text/plain; charset=UTF-8
      Refresh: 3; url=http://bcsec-2.ent.cloudera.com:8088/ws/v1/cluster/metrics
      Content-Length: 117
      Server: Jetty(6.1.26)
      
      This is standby RM. Redirecting to the current active RM: http://bcsec-2.ent.cloudera.com:8088/ws/v1/cluster/metrics
      

        Attachments

        1. YARN-2605.1.patch
          2 kB
          Xuan Gong
        2. YARN-2605.2.patch
          2 kB
          Xuan Gong

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              • Assignee:
                xgong Xuan Gong
                Reporter:
                bcwalrus bc Wong
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                  Updated:
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