launchpad-dev team mailing list archive

[Jeroen Vermeulen <jtv@xxxxxxxxxxxxx>]

Hi all,

As you may know you can speed up your local test runs immensely by setting

    LP_PERSISTENT_TEST_SERVICES=1

somewhere, e.g. in your .bashrc.  This keeps Librarian and memcached 
running across test runs so that you don't have to wait for those layers 
to set up every time you want to run a test.
It turns out there's one risk though.  After an unexpected system 
shutdown, my Librarian consistently failed to start up.  Whenever test 
runs tried to set up LaunchpadFunctionalLayer, I got a traceback ending 
with:
LayerIsolationError: Librarian has been killed or has hung.Tests should 
use LibrarianLayer.hide() and LibrarianLayer.reveal() where possible, 
and ensure the Librarian is restarted if it absolutely must be shutdown: 
[Errno socket error] (111, 'Connection refused')
( Full traceback at http://paste.ubuntu.com/459509/ )

None of the usual tricks help: make clean, make, make schema, 
rocketfuel-get, rocketfuel-setup, fresh branch, cleaning out /var/tmp, 
reboots and so on.
What *did* fix the problem was to run the same tests again but without 
LP_PERSISTENT_TEST_SERVICES set.  That brings the librarian back into a 
usable state and you can go right back to using persistent test services.

Jeroen