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  1. Hadoop YARN
  2. YARN-149 [Umbrella] ResourceManager (RM) Fail-over
  3. YARN-2605

[RM HA] Rest api endpoints doing redirect incorrectly

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    Description

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

        Issue Links

          blocks

          Bug - A problem which impairs or prevents the functions of the product. SLIDER-846 [RM HA] Slider Application Master url from RM UI complains "This is standby RM"

          • Major - Major loss of function.
          • Open
          is depended upon by

          New Feature - A new feature of the product, which has yet to be developed. SLIDER-151 Implement full slider API in REST and switch client to it

          • Major - Major loss of function.
          • Open

          New Feature - A new feature of the product, which has yet to be developed. YARN-2084 YARN to support REST APIs in AMs

          • Major - Major loss of function.
          • Open
          is duplicated by

          Bug - A problem which impairs or prevents the functions of the product. YARN-4112 YARN HA secondary-RM/NM redirect not parseable by Ambari/curl in a Kerberoized deployment

          • Minor - Minor loss of function, or other problem where easy workaround is present.
          • Open
          is related to

          Sub-task - The sub-task of the issue KNOX-1581 YARN v1 UI - Application - Node and logs links broken

          • Major - Major loss of function.
          • Closed

          Bug - A problem which impairs or prevents the functions of the product. YARN-3601 Fix UT TestRMFailover.testRMWebAppRedirect

          • Critical - Crashes, loss of data, severe memory leak.
          • Closed

          Bug - A problem which impairs or prevents the functions of the product. YARN-3526 ApplicationMaster tracking URL is incorrectly redirected on a QJM cluster

          • Major - Major loss of function.
          • Closed
          relates to

          Bug - A problem which impairs or prevents the functions of the product. AMBARI-12995 Ambari alerts reports "UNKNOWN" error for secondary YARN RM and NM in a kerberoized YARN HA deployment

          • Major - Major loss of function.
          • Open

          Bug - A problem which impairs or prevents the functions of the product. YARN-3654 ContainerLogsPage web UI should not have meta-refresh

          • Major - Major loss of function.
          • Resolved

          Improvement - An improvement or enhancement to an existing feature or task. YARN-3193 When visit standby RM webui, it will redirect to the active RM webui slowly.

          • Minor - Minor loss of function, or other problem where easy workaround is present.
          • Closed

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            People

              xgong Xuan Gong
              bcwalrus bc Wong
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                Created:
                Updated:
                Resolved: