Take a look here for possible solutions: VMware KB: vMotion fails with the error: Migration to host <> failed with error and you're using a MTU other than 1500 ? All host have the same problem or there are hosts that vMotion is working ?---
Senior Infrastructure Specialist
We only used default MTU 1500. All host vmotion working fine, only one host have a problem, if power-off vm we can manage to migrate and if power-on or live vm we encounter below error message.
Error when trying to vMotion:
failed with error msg.vmk.status.VMK_IS_DISCONNECTED (195887150).
failed writing stream completion: Already disconnected
failed to flush stream buffer: Already disconnected
socket connected returned: Already disconnected
Any possible resolution on this issue? please help if you contented the same issue before
I found VirtualRealization: Migration to host failed with error Already Disconnected (195887150) where the author was able to resolve such an issue with changing the vMotion IP addresses. So maybe something just needed to be "re-initialized". At least worth a try.
Issue resolved by rebooting the host.