Fix error message if specific host does not have capacity

Author: harikrishna-patnala

server/src/main/java/com/cloud/vm/UserVmManagerImpl.java

@@ -5409,7 +5409,12 @@ public Pair<UserVmVO, Map<VirtualMachineProfile.Param, Object>> startVirtualMach
             final ServiceOfferingVO offering = serviceOfferingDao.findById(vm.getId(), vm.getServiceOfferingId());
             Pair<Boolean, Boolean> cpuCapabilityAndCapacity = _capacityMgr.checkIfHostHasCpuCapabilityAndCapacity(destinationHost, offering, false);
             if (!cpuCapabilityAndCapacity.first() || !cpuCapabilityAndCapacity.second()) {
-                String errorMsg = "Cannot deploy the VM to specified host " + hostId + "; host has cpu capability? " + cpuCapabilityAndCapacity.first() + ", host has capacity? " + cpuCapabilityAndCapacity.second();
+                String errorMsg;
+                if (!cpuCapabilityAndCapacity.first()) {
+                    errorMsg = String.format("Cannot deploy the VM to specified host %d, requested CPU and speed is more than the host capability", hostId);
+                } else {
+                    errorMsg = String.format("Cannot deploy the VM to specified host %d, host does not have enough free CPU or RAM, please check the logs", hostId);
+                }
                 s_logger.info(errorMsg);
                 if (!AllowDeployVmIfGivenHostFails.value()) {
                     throw new InvalidParameterValueException(errorMsg);