Failed to verify nodes because Failed to verify oms nodes. because they are null or not avaliable

While instalation cluster we faced this issue

Could you please any one look in to this issue

2020-08-31 08:58,980 INFO [pool-3-thread-5] getUnManagedNodes enter: requestNodes=null null null null null null null null null com.huawei.bigdata.om.controller.service.managed.model.ManagedNode.getUnManagedNodes(ManagedNode.java:536)
2020-08-31 08:58,980 INFO [pool-3-thread-5] getUnManagedNodes exit. 9 nodes of requested 9 nodes are unmanaged. unmanaged nodes id: null null null null null null null null null com.huawei.bigdata.om.controller.service.managed.model.ManagedNode.getUnManagedNodes(ManagedNode.java:556)
2020-08-31 08:58,079 ERROR [pool-3-thread-5] Verification Execution Fail due to {} com.huawei.bigdata.om.controller.command.ClusterCreateCommand.execute(ClusterCreateCommand.java:550)
java.lang.IllegalArgumentException: Failed to verify oms nodes. because they are null or not avaliable.
at com.huawei.bigdata.om.controller.command.ClusterCreateCommand.execute(ClusterCreateCommand.java:313)
at com.huawei.bigdata.om.controller.command.CommandTransactionContext.runCommand(CommandTransactionContext.java:36)
at com.huawei.bigdata.om.controller.command.CommandTransactionContext$$FastClassBySpringCGLIB$$97100c99.invoke(<generated>)
at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:204)
at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.invokeJoinpoint(CglibAopProxy.java:736)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:157)
at org.springframework.transaction.interceptor.TransactionInterceptor$1.proceedWithInvocation(TransactionInterceptor.java:99)
at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(Transa

Dear srik,

FI 6.5.1 supports independent OMS deployment, both the active and standby OMS nodes must be deployed. Alternatively, do not select the node where the standby OMS resides during cluster installation. Please reinstall OMS.

More information:

https://support.huawei.com/enterprise/en/doc/EDOC1100094226/3133b150/installing-the-cluster

Thanks.