/etc/init.d/buildmaster.<instance> fails with system default python3.4: /usr/lib/python-exec/python3.4/twistd: this Python implementation (python3.4) is not supported by the script. See also #524360. This did not seem to occur with 0.9.0_rc1.
Created attachment 443180 [details] Partial revert of init changes
The init script has been changed to instead enforce python2. This will allow for simpler change when the newer twisted versions are in the tree and buildbot finally is py3 capable.