[GitHub] [arrow-datafusion] alamb commented on a change in pull request #1537: Make call SchedulerServer::new once in ballista-scheduler process

[GitBox <gi...@apache.org>]

alamb commented on a change in pull request #1537:
URL: https://github.com/apache/arrow-datafusion/pull/1537#discussion_r782112615



##########
File path: ballista/rust/scheduler/src/main.rs
##########
@@ -62,14 +63,18 @@ async fn start_server(
         "Ballista v{} Scheduler listening on {:?}",
         BALLISTA_VERSION, addr
     );
+    //there should be only one SchedulerServer in process

Review comment:
       I don't understand how this code ensures just one `SchedulerServer` exists per process.
   
   It seems to me what this code does is create a new `SchedulerServer` on a port that the operating system picks.




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