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ESXi/ESX host reports the alert: Unable to apply DRS settings on host. The available CPU resources in the parent resource pool are insufficient for the operation (2044635)

Symptoms

  • The ESX/ESXi host reports this alert in the Summary tab:

    Unable to apply DRS settings on host. The available CPU resources in the parent resource pool are insufficient for the operation.

  • In the /var/log/hostd.log file, you see entries similar to:

    2013-02-05T03:39:02.327Z [58597B90 info 'TaskManager' opID=HB-host-47@98-33a6b6f7-4f] Task Created : haTask-ha-root-pool-vim.ResourcePool.updateChildResourceConfiguration-321049836
    2013-02-05T03:39:02.328Z [58597B90 info 'vm:/vmfs/volumes/50b3185d-da6a6a33-6bc5-00215e4cb5da/example-domain.com/example-domain.com.vmx' opID=HB-host-47@98-33a6b6f7-4f] State Transition (VM_STATE_ON -> VM_STATE_RECONFIGURING)
    2013-02-05T03:39:02.328Z [58597B90 warning 'HostsvcPlugin' opID=HB-host-47@98-33a6b6f7-4f] CPU/Memory resource update failed: Sysinfo error on operation returned status : Admission check failed for cpu resource. Please see the VMkernel log for detailed error information
    2013-02-05T03:39:02.328Z [58597B90 info 'vm:/vmfs/volumes/50b3185d-da6a6a33-6bc5-00215e4cb5da/example-domain.com/example-domain.com.vmx' opID=HB-host-47@98-33a6b6f7-4f] RsrcMgr failed to update resource config: vim.fault.InsufficientCpuResourcesFault
    2013-02-05T03:39:02.330Z [58340B90 info 'Hbrsvc'] Replicator: powerstate change VM: 3 Old: 1 New: 1
    2013-02-05T03:39:02.330Z [58340B90 verbose 'Hbrsvc'] Replicator: Remove group no matching entry for VM (id=3)
    2013-02-05T03:39:02.330Z [58340B90 verbose 'vim.PerformanceManager'] Adding vm 3 to poweredOnVms list
    2013-02-05T03:39:02.330Z [58597B90 info 'Vmomi' opID=HB-host-47@98-33a6b6f7-4f] Throw vim.fault.InsufficientCpuResourcesFault
    2013-02-05T03:39:02.332Z [58597B90 info 'Vmomi' opID=HB-host-47@98-33a6b6f7-4f] Result:
    --> (vim.fault.InsufficientCpuResourcesFault) {
    --> dynamicType = <unset>,
    --> faultCause = (vmodl.MethodFault) null,
    --> faultMessage = (vmodl.LocalizableMessage) [
    --> (vmodl.LocalizableMessage) {
    --> dynamicType = <unset>,
    --> key = "vob.sched.group.cpu.admitfailed",
    --> arg = (vmodl.KeyAnyValue) [
    --> (vmodl.KeyAnyValue) {
    --> dynamicType = <unset>,
    --> key = "1",
    --> value = "vm.4972",
    --> },
    --> (vmodl.KeyAnyValue) {
    --> dynamicType = <unset>,
    --> key = "2",
    --> value = "4096",
    --> },
    --> (vmodl.KeyAnyValue) {
    --> dynamicType = <unset>,
    --> key = "3",
    --> value = "mhz",
    --> }
    --> ],
    --> message = "Group vm.4972: Can't admit VM: CPU admission check failed. Invalid reservation 4096 mhz
    --> ",
    --> }
    --> ],
    --> unreserved = -1,
    --> requested = -1,
    --> msg = ""

Cause

This alert is displayed when the virtual machine's CPU/memory reservation is set, but the ESX/ESXi host does not have sufficient resources to allocate the reserved resource.

Resolution

To resolve this issue, either reduce the CPU/memory reservation or remove the reservation.

To remove or reduce the reservation:
  1. Locate the virtual machine causing this issue from the log file.
  2. In the vSphere Client, right-click the virtual machine and click Edit Settings.
  3. Click the Resources tab.
  4. Reduce the reserved CPU/memory value or set it to 0 to remove the reservation.
  5. Click OK.

    The virtual machine reconfigures and you should no longer see the alert in the Summary tab.

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