[GitHub] [ozone] GlenGeng commented on pull request #2090: HDDS-5033. SCM may not be able to know full port list of Datanode after Datanode is started.

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

GlenGeng commented on pull request #2090:
URL: https://github.com/apache/ozone/pull/2090#issuecomment-811774644


   > @GlenGeng , can you explain why OzoneContainer#start() needs to be called multiple times if SCM HA is enabled for registering to the same SCM?
   
   Please check 
   ```
   public class SCMConnectionManager
       implements Closeable, SCMConnectionManagerMXBean {
     private static final Logger LOG =
         LoggerFactory.getLogger(SCMConnectionManager.class);
   
     private final ReadWriteLock mapLock;
     private final Map<InetSocketAddress, EndpointStateMachine> scmMachines;
   ```
   
   If SCM HA is enabled, there will be 3 VersionEndpointTask created, one for each SCM. 


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