While attempting to resolve the problem described at Upgrade to Plone 5.0.4 from 4.3.9 fails due to zombie pdfpeek I added collective.pdfpeek to the eggs section of my buildout.cfg and rebuilt. After installing poppler-utils and lynx, my site starts up, but exits after a moment with the following message:
(zinstance) 20:49:45 plone_daemon@www1(zinstance)$ python -m pdb bin/instance fg
> /opt/plone/zinstance/bin/instance(3)<module>()
-> import sys
(Pdb) c
2016-09-05 21:02:47 INFO ZServer HTTP server started at Mon Sep 5 21:02:47 2016
Hostname: 0.0.0.0
Port: 8080
2016-09-05 21:02:49 WARNING ZODB.blob (5963) Blob dir /opt/plone/zinstance/var/blobstorage/ has insecure mode setting
2016-09-05 21:02:53 WARNING plone.behavior Specifying 'for' in behavior 'PDF thumbnails and metadata' if no 'factory' is given has no effect and is superfluous.
2016-09-05 21:02:53 INFO Plone OpenID system packages not installed, OpenID support not available
2016-09-05 21:02:56 INFO Zope Ready to handle requests
2016-09-05 21:02:56 WARNING OFS.Uninstalled Could not import class 'RedirectionTool' from module 'Products.RedirectionTool.RedirectionTool'
2016-09-05 21:02:56 WARNING OFS.Uninstalled Could not import class 'Registry' from module 'Products.Marshall.registry'
2016-09-05 21:02:56 WARNING OFS.Uninstalled Could not import class 'WickedSettings' from module 'plone.app.controlpanel.markup'
2016-09-05 21:02:57 INFO plone.app.theming.policy local cache invalidated on thread 140275144926976
2016-09-05 21:02:57 INFO plone.app.theming.policy initializing local cache on thread 140275144926976 for http://localhost:8080/aardvarque-site::None
The program exited via sys.exit(). Exit status: -11
> /opt/plone/zinstance/bin/instance(3)<module>()
-> import sys
(Pdb)
Does this look familiar to anyone? If not, any ideas on how to start debugging this? What would cause an exit with no error message at all?