Intend to backport OAK-7132 to 1.8

[Michael Dürig]

Hi,
I intent to backport OAK-7132 to Oak 1.8. This is a fix to a critical 
error in the TarMK persistence layer that could lead to data loss. The 
fix was evaluated in trunk through an internal (to Adobe) longevity test 
for 5 day.

Michael