Applies to ONTAP 9 Issue System hangs and becomes unresponsive when attempting to lock a file. Users experience delays or inability to access resources. Packet traces from the client and ONTAP reveal ...Applies to ONTAP 9 Issue System hangs and becomes unresponsive when attempting to lock a file. Users experience delays or inability to access resources. Packet traces from the client and ONTAP reveal the absence of NLM packets related to locking operations.