HBASE-29144 Avoid using SASL when retrieving the cluster ID

Author: junegunn

hbase-client/src/main/java/org/apache/hadoop/hbase/ipc/RpcConnection.java

@@ -131,7 +131,8 @@ protected RpcConnection(Configuration conf, HashedWheelTimer timeoutTimer, Conne
     this.connectionAttributes = connectionAttributes;
     User ticket = remoteId.getTicket();
     this.securityInfo = SecurityInfo.getInfo(remoteId.getServiceName());
-    this.useSasl = isSecurityEnabled;
+    // Avoid using SASL when retrieving the cluster ID
+    this.useSasl = isSecurityEnabled && !HConstants.CLUSTER_ID_DEFAULT.equals(clusterId);
 
     // Choose the correct Token and AuthenticationProvider for this client to use
     SaslClientAuthenticationProviders providers =