Citrix XenServer 6.1 Internal error: File “xapi_xenops.ml”, line 1788, characters 3-9: Assertion failed

Today I rebooted a xen host, everything came back up as I would expect, and after trying to live migrate VMs back onto the host I got this error message.

Internal error: File "xapi_xenops.ml", line 1788, characters 3-9: Assertion failed

I thought it was something wrong with xencenter, but then tried via command line and got this error:

Error code: SR_BACKEND_FAILURE_46
Error parameters: , The VDI is not available [opterr=VDI SOME-UUID already attached RW]

 

The message “The VDI is not available” I’ve seen many times before and I knew what to do.

 

 

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