I can confirm that the patch in Bug 567143 (mkdir -p /lib/init/rw/sendsigs.omit.d in /etc/init.d/open-iscsi) works around this issue.
But open-iscsi is not the only init script that relies on /lib/init/rw/sendsigs.omit.d, so it is not open-iscsi's job to create it. This is clearly a bug in the initscripts package (source package sysvinit), and I have opened a bug against that package:
I can confirm that the patch in Bug 567143 (mkdir -p /lib/init/ rw/sendsigs. omit.d in /etc/init. d/open- iscsi) works around this issue.
But open-iscsi is not the only init script that relies on /lib/init/ rw/sendsigs. omit.d, so it is not open-iscsi's job to create it. This is clearly a bug in the initscripts package (source package sysvinit), and I have opened a bug against that package:
https:/ /bugs.launchpad .net/ubuntu/ +source/ sysvinit/ +bug/603760