File slotsfile closed with dirty buffers - what does this mean as the VMs on this host blipped?

[G0nz0UK]

Hi,

We had a blip on a host today and the VMs on that host felt it for a a minute and went offline, the error was:

BC: 3118: File slotsfile closed with dirty buffers. Possible data loss. (2020-07-10T09:06:56.110Z cpu0:4970122)

What could this mean?  I can't find anything on this.

Thanks

[DP4]

Also seen this whilst looking at another issue, interested in understanding why. Seeing it on multiple hosts.

We have seen this but only a single VM spat the dummy and was reset by HA Monitoring for Heartbeating.