[Bug 1726504] Re: Was there a change of RemoveIPC semantics in Ubuntu 17.10?

[Renardo]

Thanks, Dimitri John Ledkov, for your kind interest in my report and for
your remarks. It's not so easy to experiment with my system during
(European) daytime, I need it to make a living.

I had not seen bug 1671760 before (the number is somehow reminiscent of
the Beagle Boys, isn't it?); I now looked at it but fail to see anything
familiar. Sorry.

I now did what I maybe should have done before – check for
reproducibility. Unfortunately it is not a problem at all. When I
comment out the “RemoveIPC=no” in /etc/systemd/logind.conf and reboot
Linux, Oracle XE fails. When I restore the entry and reboot, Oracle XE
works. Just logging out and in again does not change anything.

I have no backups of the /etc directory but I have a second PC which has
not been updated to Ubuntu 17.10 (so the name is “artful”, thanks, but I
never remember such names). The “RemoveIPC” line is commented out there
as well, which confirms your assumption that nothing was changed on
upgrade. But Oracle had no problems running on this machine. And I doubt
that upgrading to Ubuntu 17.10 did in any way touch Oracle XE; certainly
Ubuntu is not supposed to know anything about Oracle (on the contrary,
to be Oracle-ignorant).

In my /var/log/apt/ directory there are term.log and history.log files.
I suppose they are not of much help. It looks like the question is not
so much “why did Oracle stop working” but “why did it work before.”

If it's evident that the treatment of RemoveIPC did not change between
Zesty and Artful I can live with the changed RemoveIPC and would agree
to close the bug.

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Title:
  Was there a change of RemoveIPC semantics in Ubuntu 17.10?

Status in systemd package in Ubuntu:
  Incomplete

Bug description:
  A few days ago I upgraded my Ubuntu 17.04 to 17.10. Afterwards I found
  that my Oracle XE would no longer start. alert_XE.log said things like

      ORA-27300: OS system dependent operation:semctl failed with status: 22
      ORA-27301: OS failure message: Invalid argument
      ORA-27302: failure occurred at: sskgpwrm1
      ORA-27157: OS post/wait facility removed
      ORA-27300: OS system dependent operation:semop failed with status: 43
      ORA-27301: OS failure message: Identifier removed
      ORA-27302: failure occurred at: sskgpwwait1

  I found that /etc/systemd/logind.conf had the RemoveIPC line commented
  out. When I set RemoveIPC=no (the default is “yes”) and rebooted
  Linux, Oracle XE started fine, as it had before the upgrade. So I
  assume the 17.10 upgrade somehow made a change to the RemoveIPC
  semantics.

  As I found that my previous installation also had a commented
  RemoveRPC it looks like Ubuntu 17.10 changed the default value from
  “no” to “yes”, and so breaks the Oracle XE installation. In this case
  I consider this behavior problematic, it should at least produce a
  clear warning during upgrade.

  If the default value did not change I have no explanation of the
  phenomenon.

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