bc Wong created YARN-2605: ----------------------------- 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} -- This message was sent by Atlassian JIRA (v6.3.4#6332)