weizhouapache commented on code in PR #7877:
URL: https://github.com/apache/cloudstack/pull/7877#discussion_r1298264421


##########
server/src/main/java/com/cloud/network/router/NetworkHelperImpl.java:
##########
@@ -618,7 +616,7 @@ protected List<HypervisorType> getHypervisors(final 
RouterDeploymentDefinition r
             throw new InsufficientServerCapacityException("Unable to create 
virtual router, there are no clusters in the zone." + 
getNoHypervisorsErrMsgDetails(),
                     DataCenter.class, dest.getDataCenter().getId());
         }
-        return hypervisors;
+        return new ArrayList(new LinkedHashSet<>(hypervisors));

Review Comment:
   @DaanHoogland 
   right.
   I was thinking about it, but if we define it as a Set, we need to convert 
the following from List to Set
   ```
               hypervisors = 
_resourceMgr.getSupportedHypervisorTypes(dest.getDataCenter().getId(), true, 
routerDeploymentDefinition.getPlan().getPodId());
   ```



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