I believe this is the logic - https://github.com/apache/ambari/blob/d2ccdcaa44350000c15c6559c405383c12aac5ae/ambari-server/src/main/java/org/apache/ambari/server/controller/AmbariCustomCommandExecutionHelper.java#L461?
________________________________ From: Pei Heng Zeng <[email protected]> Sent: Tuesday, March 22, 2016 11:42 AM To: [email protected] Subject: Re: Run Service Check on a certain node Hi Sumit, Thanks for replying. My service has both Master and Client. The Master itself is also a client. Is there some logic behind which node Ambari picks to run the Service Check? Thanks On Tue, Mar 22, 2016 at 11:36 AM, Sumit Mohanty <[email protected]<mailto:[email protected]>> wrote: I thought the Service Check is only run on CLIENT components associated with the Service. However, if there are no CLIENT components then it may be picking up any host that has any component. Does your service only has a MASTER component? ________________________________ From: Pei Heng Zeng <[email protected]<mailto:[email protected]>> Sent: Tuesday, March 22, 2016 11:32 AM To: [email protected]<mailto:[email protected]> Subject: Run Service Check on a certain node Hi, I am trying to implement a Service Check feature for a custom service in Ambari. I am running into a problem where I have no control over which node the Service Check is run on. This is a problem because the Service Check is only designed to run on the node where the Master of the service resides. If the Master happens to be on the node that Ambari picks to run the Service Check, then the Service Check will run properly. Otherwise, it will basically be a no-op. Did anyone else run into similar issues? Your response is greatly appreciated. Sincerely, Pei Heng Zeng
