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Xuan Gong commented on YARN-2605: --------------------------------- [~adhoot] Feel free to assign back to yourself, if you have already worked on this ticket. [~steve_l] Please take a look. Removed the refresh header, add the location header to hold the redirect url, and set status as 307. {code} $ curl -i http://127.0.0.1:33188/ws/v1/cluster/metrics HTTP/1.1 307 TEMPORARY_REDIRECT Cache-Control: no-cache Expires: Thu, 16 Apr 2015 23:01:47 GMT Date: Thu, 16 Apr 2015 23:01:47 GMT Pragma: no-cache Expires: Thu, 16 Apr 2015 23:01:47 GMT Date: Thu, 16 Apr 2015 23:01:47 GMT Pragma: no-cache Content-Type: text/plain; charset=UTF-8 Location: http://localhost:23188/ws/v1/cluster/metrics Content-Length: 84 Server: Jetty(6.1.26) This is standby RM. The redirect url ishttp://localhost:23188/ws/v1/cluster/metrics {code} If i do {code} $ curl -i -L http://127.0.0.1:33188/ws/v1/cluster/metrics {code} , it will redirect to the active rm and get the metrics. > [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: Sub-task > Components: resourcemanager > Affects Versions: 2.4.0 > Reporter: bc Wong > Assignee: Anubhav Dhoot > Labels: newbie > Attachments: YARN-2605.1.patch > > > 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)