bzr: ERROR: Parent not accessible given base

[Robert Bruce Park]

Just wondering if this is an issue in launchpad that can be resolved or what is going on here exactly:

$ bzr missing --directory lp:unity8 lp:~untrusted-ci-dev-bot/unity8/unity8-ubuntu-yakkety-landing-008
bzr: ERROR: Parent not accessible given base "bzr+ssh://bazaar.launchpad.net/+branch/unity8/" and relative path "../../../~didrocks/unity8/trunk/"

[Robert Bruce Park (robru)]

The weird thing is that it works if you reverse them:

$ bzr missing --directory lp:~untrusted-ci-dev-bot/unity8/unity8-ubuntu-yakkety-landing-008 lp:unity8
You have 2 extra revisions:
[snip]

Other projects work both ways, so this seems to be a project-specific glitch:

$ bzr missing --directory lp:~ci-train-bot/ubuntu-keyboard/ubuntu-keyboard-ubuntu-yakkety-landing-031 lp:ubuntu-keyboard
You have 2 extra revisions:
[snip]
$ bzr missing --directory lp:ubuntu-keyboard lp:~ci-train-bot/ubuntu-keyboard/ubuntu-keyboard-ubuntu-yakkety-landing-031
You are missing 2 revisions:
[snip]

It seems this affects at least unity8 and media-hub:

$ bzr missing --directory lp:~ci-train-bot/media-hub/media-hub-ubuntu-yakkety-landing-055 lp:media-hub
You have 2 extra revisions:
[snip]
$ bzr missing --directory lp:media-hub lp:~ci-train-bot/media-hub/media-hub-ubuntu-yakkety-landing-055
bzr: ERROR: Parent not accessible given base "bzr+ssh://bazaar.launchpad.net/+branch/media-hub/" and relative path "../../../~jhodapp/media-hub/initial_branch/"

[Vincent Ladeuil (vila)]

Hmm, 'bzr missing' default to 'parent_location' if a single branch is provided.

That code path shouldn't be triggered here since you're providing two branches.

The workaround is to fix the bogus 'parent_location':

$ bzr config -d lp:unity8
branch:
  stacked_on_location = ""
  parent_location = ../../../~didrocks/unity8/trunk/ <== bogus
  public_branch = lp:unity8
  push_location = bzr+ssh://bazaar.launchpad.net/+branch/unity8/rtm-14.09/

$ bzr config -d lp:media-hub
branch:
  parent_location = ../../../~jhodapp/media-hub/initial_branch/ <== bogus

Those bogus 'parent_location' come from bzr push replicating them from their local value and is (generally ;) harmless.

[Vincent Ladeuil (vila)]

> The workaround is to fix the bogus 'parent_location'

I mean:

$ bzr config -d lp:unity8 --remove parent_location

which requires write access to the branch.

[Robert Bruce Park (robru)]

Thanks vincent, that does seem to work.