vMotion Failing: Invalid Argument IPv6

You are attempting to vMotion a VM, likely using the vSphere web client and likely trying to change host and storage. /var/log/vmkernel.log on the source ESXi host is showing errors.    Specifically this error: 2016-09-24T14:39:57.638Z cpu5:34608)FSS: 5914: Failed to open file ‘vmware.log’; Requested flags 0x2, world: 34608 [vpxa-worker] (Existing flags 0x5, world: 76640135 [vmx]): Busy /var/log/host.log ...