zymap commented on a change in pull request #8961:
URL: https://github.com/apache/pulsar/pull/8961#discussion_r543212744



##########
File path: 
pulsar-zookeeper-utils/src/main/java/org/apache/pulsar/zookeeper/ZkIsolatedBookieEnsemblePlacementPolicy.java
##########
@@ -74,23 +78,26 @@ public RackawareEnsemblePlacementPolicyImpl 
initialize(ClientConfiguration conf,
         if (conf.getProperty(ISOLATION_BOOKIE_GROUPS) != null) {
             String isolationGroupsString = 
castToString(conf.getProperty(ISOLATION_BOOKIE_GROUPS));
             if (!isolationGroupsString.isEmpty()) {
-                for (String isolationGroup : isolationGroupsString.split(",")) 
{
-                    primaryIsolationGroups.add(isolationGroup);
-                }
+                fillIsolationGroup(isolationGroupsString, "");
                 bookieMappingCache = getAndSetZkCache(conf);
             }
         }
         if (conf.getProperty(SECONDARY_ISOLATION_BOOKIE_GROUPS) != null) {
             String secondaryIsolationGroupsString = 
castToString(conf.getProperty(SECONDARY_ISOLATION_BOOKIE_GROUPS));
-            if (!secondaryIsolationGroupsString.isEmpty()) {
-                for (String isolationGroup : 
secondaryIsolationGroupsString.split(",")) {
-                    secondaryIsolationGroups.add(isolationGroup);
-                }
-            }
+            fillIsolationGroup("", secondaryIsolationGroupsString);
         }
         return super.initialize(conf, optionalDnsResolver, timer, 
featureProvider, statsLogger, bookieAddressResolver);
     }
 
+    private void fillIsolationGroup(String isolationBookieGroups, String 
secondaryIsolationBookieGroups) {
+        if (!isolationBookieGroups.isEmpty()) {
+            
primaryIsolationGroups.addAll(Arrays.asList(isolationBookieGroups.split(",")));

Review comment:
       okay. I will fix it. 
   I wonder if it called from auto-recovery, the primaryIsolationGroups should 
be empty, right? Because the auto-recovery hasn't filled the list.




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