bc Wong created YARN-2605:
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Summary: [RM HA] Rest api endpoints doing redirect incorrectly
Key: YARN-2605
URL: https://issues.apache.org/jira/browse/YARN-2605
Project: Hadoop YARN
Issue Type: Bug
Components: resourcemanager
Affects Versions: 2.4.0
Reporter: bc Wong
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:
{noformat}
$ 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
{noformat}
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