diff --git a/api/src/main/java/org/apache/cloudstack/api/command/admin/internallb/StopInternalLBVMCmd.java b/api/src/main/java/org/apache/cloudstack/api/command/admin/internallb/StopInternalLBVMCmd.java
index 1381f6705276..76ad4d438d28 100644
--- a/api/src/main/java/org/apache/cloudstack/api/command/admin/internallb/StopInternalLBVMCmd.java
+++ b/api/src/main/java/org/apache/cloudstack/api/command/admin/internallb/StopInternalLBVMCmd.java
@@ -51,7 +51,7 @@ public class StopInternalLBVMCmd extends BaseAsyncCmd {
     @Parameter(name = ApiConstants.ID, type = CommandType.UUID, entityType = DomainRouterResponse.class, required = true, description = "the ID of the internal lb vm")
     private Long id;
 
-    @Parameter(name = ApiConstants.FORCED, type = CommandType.BOOLEAN, required = false, description = "Force stop the VM. The caller knows the VM is stopped.")
+    @Parameter(name = ApiConstants.FORCED, type = CommandType.BOOLEAN, required = false, description = "Force stop the VM (vm is marked as Stopped even when command fails to be send to the backend, otherwise a force poweroff is attempted). To be used if the caller knows the VM is stopped and should be marked as such.")
     private Boolean forced;
 
     // ///////////////////////////////////////////////////
diff --git a/api/src/main/java/org/apache/cloudstack/api/command/admin/router/StopRouterCmd.java b/api/src/main/java/org/apache/cloudstack/api/command/admin/router/StopRouterCmd.java
index b9e156612686..2da38d904264 100644
--- a/api/src/main/java/org/apache/cloudstack/api/command/admin/router/StopRouterCmd.java
+++ b/api/src/main/java/org/apache/cloudstack/api/command/admin/router/StopRouterCmd.java
@@ -49,7 +49,7 @@ public class StopRouterCmd extends BaseAsyncCmd {
     @Parameter(name = ApiConstants.ID, type = CommandType.UUID, entityType = DomainRouterResponse.class, required = true, description = "the ID of the router")
     private Long id;
 
-    @Parameter(name = ApiConstants.FORCED, type = CommandType.BOOLEAN, required = false, description = "Force stop the VM. The caller knows the VM is stopped.")
+    @Parameter(name = ApiConstants.FORCED, type = CommandType.BOOLEAN, required = false, description = "Force stop the VM (vm is marked as Stopped even when command fails to be send to the backend, otherwise a force poweroff is attempted). To be used if the caller knows the VM is stopped and should be marked as such.")
     private Boolean forced;
 
     // ///////////////////////////////////////////////////
diff --git a/api/src/main/java/org/apache/cloudstack/api/command/admin/systemvm/StopSystemVmCmd.java b/api/src/main/java/org/apache/cloudstack/api/command/admin/systemvm/StopSystemVmCmd.java
index 755c8e462056..4bb533ce5b6a 100644
--- a/api/src/main/java/org/apache/cloudstack/api/command/admin/systemvm/StopSystemVmCmd.java
+++ b/api/src/main/java/org/apache/cloudstack/api/command/admin/systemvm/StopSystemVmCmd.java
@@ -54,7 +54,7 @@ public class StopSystemVmCmd extends BaseAsyncCmd {
                description = "The ID of the system virtual machine")
     private Long id;
 
-    @Parameter(name = ApiConstants.FORCED, type = CommandType.BOOLEAN, required = false, description = "Force stop the VM.  The caller knows the VM is stopped.")
+    @Parameter(name = ApiConstants.FORCED, type = CommandType.BOOLEAN, required = false, description = "Force stop the VM (vm is marked as Stopped even when command fails to be send to the backend, otherwise a force poweroff is attempted). To be used if the caller knows the VM is stopped and should be marked as such.")
     private Boolean forced;
 
     /////////////////////////////////////////////////////
diff --git a/api/src/main/java/org/apache/cloudstack/api/command/user/vm/StopVMCmd.java b/api/src/main/java/org/apache/cloudstack/api/command/user/vm/StopVMCmd.java
index 529e09a0753a..113ba9ed25db 100644
--- a/api/src/main/java/org/apache/cloudstack/api/command/user/vm/StopVMCmd.java
+++ b/api/src/main/java/org/apache/cloudstack/api/command/user/vm/StopVMCmd.java
@@ -55,7 +55,8 @@ public class StopVMCmd extends BaseAsyncCmd implements UserCmd {
     private Long id;
 
     @Parameter(name = ApiConstants.FORCED, type = CommandType.BOOLEAN, required = false, description = "Force stop the VM "
-        + "(vm is marked as Stopped even when command fails to be send to the backend, otherwise a force poweroff is attempted).  The caller knows the VM is stopped.")
+        + "(vm is marked as Stopped even when command fails to be send to the backend, otherwise a force poweroff is attempted)."
+        + " This option is to be used if the caller knows the VM is stopped and should be marked as such.")
     private Boolean forced;
 
     // ///////////////////////////////////////////////////
diff --git a/plugins/network-elements/netscaler/src/main/java/com/cloud/api/commands/StopNetScalerVMCmd.java b/plugins/network-elements/netscaler/src/main/java/com/cloud/api/commands/StopNetScalerVMCmd.java
index 5d754168e492..288e867277a4 100644
--- a/plugins/network-elements/netscaler/src/main/java/com/cloud/api/commands/StopNetScalerVMCmd.java
+++ b/plugins/network-elements/netscaler/src/main/java/com/cloud/api/commands/StopNetScalerVMCmd.java
@@ -56,7 +56,7 @@ public class StopNetScalerVMCmd extends BaseAsyncCmd {
     @Parameter(name = ApiConstants.ID, type = CommandType.UUID, entityType = DomainRouterResponse.class, required = true, description = "the ID of the NetScaler vm")
     private Long id;
 
-    @Parameter(name = ApiConstants.FORCED, type = CommandType.BOOLEAN, required = false, description = "Force stop the VM. The caller knows the VM is stopped.")
+    @Parameter(name = ApiConstants.FORCED, type = CommandType.BOOLEAN, required = false, description = "Force stop the VM (vm is marked as Stopped even when command fails to be send to the backend, otherwise a force poweroff is attempted). To be used if the caller knows the VM is stopped and should be marked as such.")
     private Boolean forced;
 
     // ///////////////////////////////////////////////////
diff --git a/server/src/main/java/com/cloud/api/query/QueryManagerImpl.java b/server/src/main/java/com/cloud/api/query/QueryManagerImpl.java
index 74367a09c53b..c28865943a96 100644
--- a/server/src/main/java/com/cloud/api/query/QueryManagerImpl.java
+++ b/server/src/main/java/com/cloud/api/query/QueryManagerImpl.java
@@ -3940,7 +3940,7 @@ private List<TemplateJoinVO> applyPublicTemplateRestriction(List<TemplateJoinVO>
     @Override
     public ListResponse<TemplateResponse> listIsos(ListIsosCmd cmd) {
         Pair<List<TemplateJoinVO>, Integer> result = searchForIsosInternal(cmd);
-        ListResponse<TemplateResponse> response = new ListResponse<TemplateResponse>();
+        ListResponse<TemplateResponse> response = new ListResponse<>();
 
         ResponseView respView = ResponseView.Restricted;
         if (cmd instanceof ListIsosCmdByAdmin) {
@@ -3967,11 +3967,11 @@ private Pair<List<TemplateJoinVO>, Integer> searchForIsosInternal(ListIsosCmd cm
             listAll = true;
         }
 
-        List<Long> permittedAccountIds = new ArrayList<Long>();
-        Ternary<Long, Boolean, ListProjectResourcesCriteria> domainIdRecursiveListProject = new Ternary<Long, Boolean, ListProjectResourcesCriteria>(cmd.getDomainId(), cmd.isRecursive(), null);
+        List<Long> permittedAccountIds = new ArrayList<>();
+        Ternary<Long, Boolean, ListProjectResourcesCriteria> domainIdRecursiveListProject = new Ternary<>(cmd.getDomainId(), cmd.isRecursive(), null);
         _accountMgr.buildACLSearchParameters(caller, id, cmd.getAccountName(), cmd.getProjectId(), permittedAccountIds, domainIdRecursiveListProject, listAll, false);
         ListProjectResourcesCriteria listProjectResourcesCriteria = domainIdRecursiveListProject.third();
-        List<Account> permittedAccounts = new ArrayList<Account>();
+        List<Account> permittedAccounts = new ArrayList<>();
         for (Long accountId : permittedAccountIds) {
             permittedAccounts.add(_accountMgr.getAccount(accountId));
         }
diff --git a/server/src/main/java/com/cloud/api/query/ViewResponseHelper.java b/server/src/main/java/com/cloud/api/query/ViewResponseHelper.java
index ecfda39972ea..48031425bb8e 100644
--- a/server/src/main/java/com/cloud/api/query/ViewResponseHelper.java
+++ b/server/src/main/java/com/cloud/api/query/ViewResponseHelper.java
@@ -21,7 +21,6 @@
 import java.util.Collections;
 import java.util.EnumSet;
 import java.util.HashMap;
-import java.util.Hashtable;
 import java.util.LinkedHashMap;
 import java.util.List;
 import java.util.Map;
@@ -150,7 +149,7 @@ public static List<UserVmResponse> createUserVmResponse(ResponseView view, Strin
     public static List<UserVmResponse> createUserVmResponse(ResponseView view, String objectName, Set<VMDetails> details, Boolean accumulateStats, Boolean showUserData,
             UserVmJoinVO... userVms) {
         Account caller = CallContext.current().getCallingAccount();
-        Hashtable<Long, UserVmResponse> vmDataList = new Hashtable<Long, UserVmResponse>();
+        LinkedHashMap<Long, UserVmResponse> vmDataList = new LinkedHashMap<>();
         // Initialise the vmdatalist with the input data
 
         for (UserVmJoinVO userVm : userVms) {
@@ -169,7 +168,7 @@ public static List<UserVmResponse> createUserVmResponse(ResponseView view, Strin
 
     public static List<DomainRouterResponse> createDomainRouterResponse(DomainRouterJoinVO... routers) {
         Account caller = CallContext.current().getCallingAccount();
-        Hashtable<Long, DomainRouterResponse> vrDataList = new Hashtable<Long, DomainRouterResponse>();
+        LinkedHashMap<Long, DomainRouterResponse> vrDataList = new LinkedHashMap<>();
         // Initialise the vrdatalist with the input data
         for (DomainRouterJoinVO vr : routers) {
             DomainRouterResponse vrData = vrDataList.get(vr.getId());
@@ -187,7 +186,7 @@ public static List<DomainRouterResponse> createDomainRouterResponse(DomainRouter
 
     public static List<SecurityGroupResponse> createSecurityGroupResponses(List<SecurityGroupJoinVO> securityGroups) {
         Account caller = CallContext.current().getCallingAccount();
-        Hashtable<Long, SecurityGroupResponse> vrDataList = new Hashtable<Long, SecurityGroupResponse>();
+        LinkedHashMap<Long, SecurityGroupResponse> vrDataList = new LinkedHashMap<>();
         // Initialise the vrdatalist with the input data
         for (SecurityGroupJoinVO vr : securityGroups) {
             SecurityGroupResponse vrData = vrDataList.get(vr.getId());
@@ -205,7 +204,7 @@ public static List<SecurityGroupResponse> createSecurityGroupResponses(List<Secu
     }
 
     public static List<ProjectResponse> createProjectResponse(EnumSet<DomainDetails> details, ProjectJoinVO... projects) {
-        Hashtable<Long, ProjectResponse> prjDataList = new Hashtable<Long, ProjectResponse>();
+        LinkedHashMap<Long, ProjectResponse> prjDataList = new LinkedHashMap<>();
         // Initialise the prjdatalist with the input data
         for (ProjectJoinVO p : projects) {
             ProjectResponse pData = prjDataList.get(p.getId());
@@ -247,7 +246,7 @@ public static List<ProjectInvitationResponse> createProjectInvitationResponse(Pr
     }
 
     public static List<HostResponse> createHostResponse(EnumSet<HostDetails> details, HostJoinVO... hosts) {
-        Hashtable<Long, HostResponse> vrDataList = new Hashtable<Long, HostResponse>();
+        LinkedHashMap<Long, HostResponse> vrDataList = new LinkedHashMap<>();
         // Initialise the vrdatalist with the input data
         for (HostJoinVO vr : hosts) {
             HostResponse vrData = ApiDBUtils.newHostResponse(vr, details);
@@ -257,7 +256,7 @@ public static List<HostResponse> createHostResponse(EnumSet<HostDetails> details
     }
 
     public static List<HostForMigrationResponse> createHostForMigrationResponse(EnumSet<HostDetails> details, HostJoinVO... hosts) {
-        Hashtable<Long, HostForMigrationResponse> vrDataList = new Hashtable<Long, HostForMigrationResponse>();
+        LinkedHashMap<Long, HostForMigrationResponse> vrDataList = new LinkedHashMap<>();
         // Initialise the vrdatalist with the input data
         for (HostJoinVO vr : hosts) {
             HostForMigrationResponse vrData = ApiDBUtils.newHostForMigrationResponse(vr, details);
@@ -267,7 +266,7 @@ public static List<HostForMigrationResponse> createHostForMigrationResponse(Enum
     }
 
     public static List<VolumeResponse> createVolumeResponse(ResponseView view, VolumeJoinVO... volumes) {
-        Hashtable<Long, VolumeResponse> vrDataList = new Hashtable<Long, VolumeResponse>();
+        LinkedHashMap<Long, VolumeResponse> vrDataList = new LinkedHashMap<>();
         DecimalFormat df = new DecimalFormat("0.0%");
         for (VolumeJoinVO vr : volumes) {
             VolumeResponse vrData = vrDataList.get(vr.getId());
@@ -308,7 +307,7 @@ public static List<VolumeResponse> createVolumeResponse(ResponseView view, Volum
     }
 
     public static List<StoragePoolResponse> createStoragePoolResponse(StoragePoolJoinVO... pools) {
-        Hashtable<Long, StoragePoolResponse> vrDataList = new Hashtable<Long, StoragePoolResponse>();
+        LinkedHashMap<Long, StoragePoolResponse> vrDataList = new LinkedHashMap<>();
         // Initialise the vrdatalist with the input data
         for (StoragePoolJoinVO vr : pools) {
             StoragePoolResponse vrData = vrDataList.get(vr.getId());
@@ -345,7 +344,7 @@ public static List<HostTagResponse> createHostTagResponse(HostTagVO... hostTags)
     }
 
     public static List<ImageStoreResponse> createImageStoreResponse(ImageStoreJoinVO... stores) {
-        Hashtable<Long, ImageStoreResponse> vrDataList = new Hashtable<Long, ImageStoreResponse>();
+        LinkedHashMap<Long, ImageStoreResponse> vrDataList = new LinkedHashMap<>();
         // Initialise the vrdatalist with the input data
         for (ImageStoreJoinVO vr : stores) {
             ImageStoreResponse vrData = vrDataList.get(vr.getId());
@@ -362,7 +361,7 @@ public static List<ImageStoreResponse> createImageStoreResponse(ImageStoreJoinVO
     }
 
     public static List<StoragePoolResponse> createStoragePoolForMigrationResponse(StoragePoolJoinVO... pools) {
-        Hashtable<Long, StoragePoolResponse> vrDataList = new Hashtable<Long, StoragePoolResponse>();
+        LinkedHashMap<Long, StoragePoolResponse> vrDataList = new LinkedHashMap<>();
         // Initialise the vrdatalist with the input data
         for (StoragePoolJoinVO vr : pools) {
             StoragePoolResponse vrData = vrDataList.get(vr.getId());
@@ -577,7 +576,7 @@ public static List<ZoneResponse> createDataCenterResponse(ResponseView view, Boo
     }
 
     public static List<TemplateResponse> createTemplateResponse(EnumSet<ApiConstants.DomainDetails> detailsView, ResponseView view, TemplateJoinVO... templates) {
-        LinkedHashMap<String, TemplateResponse> vrDataList = new LinkedHashMap<String, TemplateResponse>();
+        LinkedHashMap<String, TemplateResponse> vrDataList = new LinkedHashMap<>();
         for (TemplateJoinVO vr : templates) {
             TemplateResponse vrData = vrDataList.get(vr.getTempZonePair());
             if (vrData == null) {
@@ -594,7 +593,7 @@ public static List<TemplateResponse> createTemplateResponse(EnumSet<ApiConstants
     }
 
     public static List<TemplateResponse> createTemplateUpdateResponse(ResponseView view, TemplateJoinVO... templates) {
-        Hashtable<Long, TemplateResponse> vrDataList = new Hashtable<Long, TemplateResponse>();
+        LinkedHashMap<Long, TemplateResponse> vrDataList = new LinkedHashMap<>();
         for (TemplateJoinVO vr : templates) {
             TemplateResponse vrData = vrDataList.get(vr.getId());
             if (vrData == null) {
@@ -610,7 +609,7 @@ public static List<TemplateResponse> createTemplateUpdateResponse(ResponseView v
     }
 
     public static List<TemplateResponse> createIsoResponse(ResponseView view, TemplateJoinVO... templates) {
-        Hashtable<String, TemplateResponse> vrDataList = new Hashtable<String, TemplateResponse>();
+        LinkedHashMap<String, TemplateResponse> vrDataList = new LinkedHashMap<>();
         for (TemplateJoinVO vr : templates) {
             TemplateResponse vrData = vrDataList.get(vr.getTempZonePair());
             if (vrData == null) {
@@ -626,7 +625,7 @@ public static List<TemplateResponse> createIsoResponse(ResponseView view, Templa
     }
 
     public static List<AffinityGroupResponse> createAffinityGroupResponses(List<AffinityGroupJoinVO> groups) {
-        Hashtable<Long, AffinityGroupResponse> vrDataList = new Hashtable<Long, AffinityGroupResponse>();
+        LinkedHashMap<Long, AffinityGroupResponse> vrDataList = new LinkedHashMap<>();
         for (AffinityGroupJoinVO vr : groups) {
             AffinityGroupResponse vrData = vrDataList.get(vr.getId());
             if (vrData == null) {
diff --git a/services/console-proxy/server/src/main/java/com/cloud/consoleproxy/ConsoleProxyNoVncClient.java b/services/console-proxy/server/src/main/java/com/cloud/consoleproxy/ConsoleProxyNoVncClient.java
index 6434dd6e42e0..2dfea2251fb6 100644
--- a/services/console-proxy/server/src/main/java/com/cloud/consoleproxy/ConsoleProxyNoVncClient.java
+++ b/services/console-proxy/server/src/main/java/com/cloud/consoleproxy/ConsoleProxyNoVncClient.java
@@ -114,6 +114,11 @@ public void run() {
                                 updateFrontEndActivityTime();
                             }
                             connectionAlive = client.isVncOverWebSocketConnectionAlive();
+                            try {
+                                Thread.sleep(1);
+                            } catch (Exception e) {
+                                s_logger.warn("Error on sleep for vnc over websocket", e);
+                            }
                         } else if (client.isVncOverNioSocket()) {
                             byte[] bytesArr;
                             int nextBytes = client.getNextBytes();
diff --git a/test/integration/smoke/test_vm_life_cycle.py b/test/integration/smoke/test_vm_life_cycle.py
index 5c8f56099982..a9a554e19ad1 100644
--- a/test/integration/smoke/test_vm_life_cycle.py
+++ b/test/integration/smoke/test_vm_life_cycle.py
@@ -1556,7 +1556,7 @@ def setUp(self):
             self.skipTest("Requires at least two hosts for performing migration related tests")
 
         for host in self.hosts:
-            if host.details['Host.OS'] in ['CentOS']:
+            if host.details['Host.OS'] and host.details['Host.OS'].startswith('CentOS'):
                 self.skipTest("live migration is not stabily supported on CentOS")
 
     def tearDown(self):
diff --git a/ui/src/config/section/image.js b/ui/src/config/section/image.js
index bf1083575ddd..c41ab9307a6a 100644
--- a/ui/src/config/section/image.js
+++ b/ui/src/config/section/image.js
@@ -213,7 +213,7 @@ export default {
         }
         return fields
       },
-      details: ['name', 'id', 'displaytext', 'checksum', 'ostypename', 'size', 'bootable', 'isready', 'directdownload', 'isextractable', 'ispublic', 'isfeatured', 'crosszones', 'account', 'domain', 'created', 'userdatadetails', 'userdatapolicy'],
+      details: ['name', 'id', 'displaytext', 'checksum', 'ostypename', 'size', 'bootable', 'isready', 'directdownload', 'isextractable', 'ispublic', 'isfeatured', 'crosszones', 'account', 'domain', 'created', 'userdatadetails', 'userdatapolicy', 'url'],
       searchFilters: ['name', 'zoneid', 'tags'],
       related: [{
         name: 'vm',