This bug is certainly 'revealed' by the switch of default Java from 6 to 7.
I did a bit of testing around the last few packages needed to support removal of openjdk-6 from main and if I tweak the dependencies for ca-certificates-java to runtime depend on openjdk-7-jre-headless everything starts working OK again.
Although I need to make that change anyway that does not sound like the correct fix - I should be able to use default-jre-headless which depends on openjdk-7-jre-headless in the same way that zookeeper does!
This bug is certainly 'revealed' by the switch of default Java from 6 to 7.
I did a bit of testing around the last few packages needed to support removal of openjdk-6 from main and if I tweak the dependencies for ca-certificates -java to runtime depend on openjdk- 7-jre-headless everything starts working OK again.
Although I need to make that change anyway that does not sound like the correct fix - I should be able to use default- jre-headless which depends on openjdk- 7-jre-headless in the same way that zookeeper does!