[jira] [Created] (SAMZA-709) Add Monitoring page for REST API and the dashboard

["Yan Fang (JIRA)" <ji...@apache.org>]

Yan Fang created SAMZA-709:
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             Summary: Add Monitoring page for REST API and the dashboard
                 Key: SAMZA-709
                 URL: https://issues.apache.org/jira/browse/SAMZA-709
             Project: Samza
          Issue Type: Improvement
          Components: docs
            Reporter: Yan Fang


Currently, we expose two monitoring urls in the AM. One is the tracking url, where the AM dashboard stays; the other one is a RPC url, which is for REST API. But we only documented the AM dashboard under [Yarn/Application Master | http://samza.apache.org/learn/documentation/0.9/yarn/application-master.html]

Suggestion:
1. create a separate monitoring page for the Web UI and REST API under [Jobs|http://samza.apache.org/learn/documentation/0.9/] category.
2. move the dashboard section from [Yarn/Application Master | http://samza.apache.org/learn/documentation/0.9/yarn/application-master.htm to the monitoring page.
3. add REST API document. The format can be similar to what [Spark uses|https://spark.apache.org/docs/latest/monitoring.html#rest-api]. What we expose through the server is in [ApplicationMasterRestServlet | https://github.com/apache/samza/blob/master/samza-yarn/src/main/scala/org/apache/samza/webapp/ApplicationMasterRestServlet.scala] . 



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