Hi,everyone:

   My environment information is as follows?

1. I Have one  cloudplatform4.3.0.2 setup with at  2 advanced zones.
2. Enable each zone with Netscaler(NSVPX-ESX-10.5-52.1115.e_nc) with GSLB
3. As a root user, create a GSLB rule
4. assign one LB rule (bj-ssh) from zone1.
5. assign another LB(nj-ssh) rule from another zone2.

6.In the region,assign more load balancing, select bj-ssh or nj-ssh in the Load balancing rule.

But it't don't work and the log is ad follows:

2014-11-24 08:31:25,436 DEBUG [c.c.a.m.DirectAgentAttache] (DirectAgent-409:ctx-22993192) Ping from 16(201-NetscalerVPXLoadBalancer-192.167.1.7)
2014-11-24 08:31:26,348 DEBUG [c.c.a.ApiServlet] (catalina-exec-11:ctx-acc60e00) ===START===  192.167.1.66 -- GET  command=assignToGlobalLoadBalancerRule&response=json&sessionkey=bIj8e72PJKAY7lNZIqIaivWplyE%3D&id=633f725e-ba0c-4b8e-af4d-ad0d7cfa56ea&loadbalancerrulelist=c6c1ae69-cf3b-4662-93e6-95c19327a718&_=1416789271771
2014-11-24 08:31:26,374 DEBUG [o.a.c.f.j.i.AsyncJobManagerImpl] (catalina-exec-11:ctx-acc60e00 ctx-b52bb4f9) submit async job-443, details: AsyncJobVO {id:443, userId: 2, accountId: 2, instanceType: None, instanceId: null, cmd: org.apache.cloudstack.api.command.user.region.ha.gslb.AssignToGlobalLoadBalancerRuleCmd, cmdInfo: {"response":"json","id":"633f725e-ba0c-4b8e-af4d-ad0d7cfa56ea","sessionkey":"bIj8e72PJKAY7lNZIqIaivWplyE\u003d","cmdEventType":"GLOBAL.LB.ASSIGN","loadbalancerrulelist":"c6c1ae69-cf3b-4662-93e6-95c19327a718","ctxUserId":"2","httpmethod":"GET","_":"1416789271771","ctxAccountId":"2","ctxStartEventId":"932"}, cmdVersion: 0, status: IN_PROGRESS, processStatus: 0, resultCode: 0, result: null, initMsid: 52231992512, completeMsid: null, lastUpdated: null, lastPolled: null, created: null}
2014-11-24 08:31:26,376 DEBUG [c.c.a.ApiServlet] (catalina-exec-11:ctx-acc60e00 ctx-b52bb4f9) ===END===  192.167.1.66 -- GET  command=assignToGlobalLoadBalancerRule&response=json&sessionkey=bIj8e72PJKAY7lNZIqIaivWplyE%3D&id=633f725e-ba0c-4b8e-af4d-ad0d7cfa56ea&loadbalancerrulelist=c6c1ae69-cf3b-4662-93e6-95c19327a718&_=1416789271771
2014-11-24 08:31:26,376 INFO  [o.a.c.f.j.i.AsyncJobMonitor] (API-Job-Executor-42:ctx-becf381e job-443) Add job-443 into job monitoring
2014-11-24 08:31:26,376 DEBUG [o.a.c.f.j.i.AsyncJobManagerImpl] (API-Job-Executor-42:ctx-becf381e job-443) Executing AsyncJobVO {id:443, userId: 2, accountId: 2, instanceType: None, instanceId: null, cmd: org.apache.cloudstack.api.command.user.region.ha.gslb.AssignToGlobalLoadBalancerRuleCmd, cmdInfo: {"response":"json","id":"633f725e-ba0c-4b8e-af4d-ad0d7cfa56ea","sessionkey":"bIj8e72PJKAY7lNZIqIaivWplyE\u003d","cmdEventType":"GLOBAL.LB.ASSIGN","loadbalancerrulelist":"c6c1ae69-cf3b-4662-93e6-95c19327a718","ctxUserId":"2","httpmethod":"GET","_":"1416789271771","ctxAccountId":"2","ctxStartEventId":"932"}, cmdVersion: 0, status: IN_PROGRESS, processStatus: 0, resultCode: 0, result: null, initMsid: 52231992512, completeMsid: null, lastUpdated: null, lastPolled: null, created: null}
2014-11-24 08:31:26,430 ERROR [c.c.a.ApiAsyncJobDispatcher] (API-Job-Executor-42:ctx-becf381e job-443) Unexpected exception while executing org.apache.cloudstack.api.command.user.region.ha.gslb.AssignToGlobalLoadBalancerRuleCmd
com.cloud.utils.exception.CloudRuntimeException: No GSLB provider is available
        at org.apache.cloudstack.region.gslb.GlobalLoadBalancingRulesServiceImpl.checkGslbServiceEnabledInZone(GlobalLoadBalancingRulesServiceImpl.java:723)
        at org.apache.cloudstack.region.gslb.GlobalLoadBalancingRulesServiceImpl.assignToGlobalLoadBalancerRule(GlobalLoadBalancingRulesServiceImpl.java:246)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:601)
        at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:317)
        at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:183)
        at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:150)
        at com.cloud.event.ActionEventInterceptor.invoke(ActionEventInterceptor.java:50)
        at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:161)
        at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:91)
        at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)
        at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:204)
        at $Proxy239.assignToGlobalLoadBalancerRule(Unknown Source)
        at org.apache.cloudstack.api.command.user.region.ha.gslb.AssignToGlobalLoadBalancerRuleCmd.execute(AssignToGlobalLoadBalancerRuleCmd.java:154)
        at com.cloud.api.ApiDispatcher.dispatch(ApiDispatcher.java:167)
        at com.cloud.api.ApiAsyncJobDispatcher.runJob(ApiAsyncJobDispatcher.java:97)
        at org.apache.cloudstack.framework.jobs.impl.AsyncJobManagerImpl$5.runInContext(AsyncJobManagerImpl.java:543)
        at org.apache.cloudstack.managed.context.ManagedContextRunnable$1.run(ManagedContextRunnable.java:50)
        at org.apache.cloudstack.managed.context.impl.DefaultManagedContext$1.call(DefaultManagedContext.java:56)
        at org.apache.cloudstack.managed.context.impl.DefaultManagedContext.callWithContext(DefaultManagedContext.java:103)
        at org.apache.cloudstack.managed.context.impl.DefaultManagedContext.runWithContext(DefaultManagedContext.java:53)
        at org.apache.cloudstack.managed.context.ManagedContextRunnable.run(ManagedContextRunnable.java:47)
        at org.apache.cloudstack.framework.jobs.impl.AsyncJobManagerImpl$5.run(AsyncJobManagerImpl.java:500)
        at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
        at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334)
        at java.util.concurrent.FutureTask.run(FutureTask.java:166)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
        at java.lang.Thread.run(Thread.java:722)
2014-11-24 08:31:26,433 DEBUG [o.a.c.f.j.i.AsyncJobManagerImpl] (API-Job-Executor-42:ctx-becf381e job-443) Complete async job-443, jobStatus: FAILED, resultCode: 530, result: org.apache.cloudstack.api.response.ExceptionResponse/null/{"uuidList":[],"errorcode":530,"errortext":"No GSLB provider is available"}
2014-11-24 08:31:26,436 DEBUG [o.a.c.f.j.i.AsyncJobManagerImpl] (API-Job-Executor-42:ctx-becf381e job-443) Publish async job-443 complete on message bus
2014-11-24 08:31:26,436 DEBUG [o.a.c.f.j.i.AsyncJobManagerImpl] (API-Job-Executor-42:ctx-becf381e job-443) Wake up jobs related to job-443
2014-11-24 08:31:26,436 DEBUG [o.a.c.f.j.i.AsyncJobManagerImpl] (API-Job-Executor-42:ctx-becf381e job-443) Update db status for job-443
2014-11-24 08:31:26,437 DEBUG [o.a.c.f.j.i.AsyncJobManagerImpl] (API-Job-Executor-42:ctx-becf381e job-443) Wake up jobs joined with job-443 and disjoin all subjobs created from job- 443
2014-11-24 08:31:26,451 DEBUG [o.a.c.f.j.i.AsyncJobManagerImpl] (API-Job-Executor-42:ctx-becf381e job-443) Done executing org.apache.cloudstack.api.command.user.region.ha.gslb.AssignToGlobalLoadBalancerRuleCmd for job-443
2014-11-24 08:31:26,451 INFO  [o.a.c.f.j.i.AsyncJobMonitor] (API-Job-Executor-42:ctx-becf381e job-443) Remove job-443 from job monitoring
2014-11-24 08:31:29,419 DEBUG [c.c.a.ApiServlet] (catalina-exec-10:ctx-679f594d) ===START===  192.167.1.66 -- GET  command=queryAsyncJobResult&jobId=9a13d40f-d1f2-4c46-a53a-eb452033a5ce&response=json&sessionkey=bIj8e72PJKAY7lNZIqIaivWplyE%3D&_=1416789274917
2014-11-24 08:31:29,471 DEBUG [c.c.a.ApiServlet] (catalina-exec-10:ctx-679f594d ctx-677a86fe) ===END===  192.167.1.66 -- GET  command=queryAsyncJobResult&jobId=9a13d40f-d1f2-4c46-a53a-eb452033a5ce&response=json&sessionkey=bIj8e72PJKAY7lNZIqIaivWplyE%3D&_=1416789274917
2014-11-24 08:31:31,267 DEBUG [c.c.a.m.AgentManagerImpl] (AgentManager-Handler-2:null) SeqA 2-13344: Processing Seq 2-13344:  { Cmd , MgmtId: -1, via: 2, Ver: v1, Flags: 11, [{"com.cloud.agent.api.ConsoleProxyLoadReportCommand":{"_proxyVmId":2,"_loadInfo":"{\n  \"connections\": []\n}","wait":0}}] }
2014-11-24 08:31:31,296 DEBUG [c.c.a.m.AgentManagerImpl] (AgentManager-Handler-2:null) SeqA 2-13344: Sending Seq 2-13344:  { Ans: , MgmtId: 52231992512, via: 2, Ver: v1, Flags: 100010, [{"com.cloud.agent.api.AgentControlAnswer":{"result":true,"wait":0}}] }
2014-11-24 08:31:31,683 DEBUG [c.c.a.m.AgentManagerImpl] (AgentManager-Handler-3:null) SeqA 5-10511: Processing Seq 5-10511:  { Cmd , MgmtId: -1, via: 5, Ver: v1, Flags: 11, [{"com.cloud.agent.api.ConsoleProxyLoadReportCommand":{"_proxyVmId":12,"_loadInfo":"{\n  \"connections\": []\n}","wait":0}}] }
2014-11-24 08:31:31,689 DEBUG [c.c.a.m.AgentManagerImpl] (AgentManager-Handler-3:null) SeqA 5-10511: Sending Seq 5-10511:  { Ans: , MgmtId: 52231992512, via: 5, Ver: v1, Flags: 100010, [{"com.cloud.agent.api.AgentControlAnswer":{"result":true,"wait":0}}] }