Unexplained high cpu usage

Expected behavior

almost no cpu use

Actual behavior

100% cpu usage

Information

Apologies for the non standard info, but I had to kill docker to regain control.

I was running the new beta Version 1.11.2-beta15 (build: 9168).
I have 1 container ( mongo official 3.2.6 ).
I upgraded yesterday, all was fine, the one container was running.
This morning, (with no use of the container ) docker was pegged at 100%.