ashishkumar50 commented on code in PR #4934:
URL: https://github.com/apache/ozone/pull/4934#discussion_r1235004988


##########
hadoop-hdds/server-scm/src/main/java/org/apache/hadoop/hdds/scm/server/SCMSecurityProtocolServer.java:
##########
@@ -232,6 +233,17 @@ private void validateSecretKeyStatus() throws 
SCMSecretKeyException {
     }
   }
 
+  @Override
+  public synchronized List<String> getAllRootCaCertificates()

Review Comment:
   As the name suggest this method is intended to use just for retrieving 
Certificate. If `rootCACertificate` is going to change that will be in other 
method. I think we should protect this with lock and use read/write lock 
accordingly.



##########
hadoop-hdds/server-scm/src/main/java/org/apache/hadoop/hdds/scm/server/SCMSecurityProtocolServer.java:
##########
@@ -101,7 +102,7 @@ public class SCMSecurityProtocolServer implements 
SCMSecurityProtocol,
       .getLogger(SCMSecurityProtocolServer.class);
   private final CertificateServer rootCertificateServer;
   private final CertificateServer scmCertificateServer;
-  private final X509Certificate rootCACertificate;
+  private final List<X509Certificate> rootCACertificate;

Review Comment:
   Can we change the name to add suffix/prefix "list" to avoid confusion that 
it not just single Certificate. 



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