com.cloud.exception.InsufficientServerCapacityException what wrong?

[Jake.liu]

   DeployDestination dest;
        try {
            dest = _dpMgr.planDeployment(vmProfile, plan, exclude);
        } catch (AffinityConflictException e) {
            throw new CloudRuntimeException("Unable to create deployment, 
affinity rules associted to the VM conflict");
        }


        if (dest != null) {
           //save destination with VMEntityVO
            VMReservationVO vmReservation = new VMReservationVO(vm.getId(), 
dest.getDataCenter().getId(), dest.getPod().getId(), dest.getCluster().getId(), 
dest.getHost().getId());
            Map<Long,Long> volumeReservationMap = new HashMap<Long,Long>();


            if (vm.getHypervisorType() != HypervisorType.BareMetal) {
                for(Volume vo : dest.getStorageForDisks().keySet()){
                    volumeReservationMap.put(vo.getId(), 
dest.getStorageForDisks().get(vo).getId());
                }
                vmReservation.setVolumeReservation(volumeReservationMap);
            }


            vmEntityVO.setVmReservation(vmReservation);
            _vmEntityDao.persist(vmEntityVO);


            return vmReservation.getUuid();
        } else if (planChangedByReadyVolume) {
            // we could not reserve in the Volume's cluster - let the deploy
            // call retry it.
            return UUID.randomUUID().toString();
        }else{
            throw new InsufficientServerCapacityException("Unable to create a 
deployment for " + vmProfile,
                    DataCenter.class, plan.getDataCenterId(), 
areAffinityGroupsAssociated(vmProfile));
        }