exceptions.AttributeError: 'NoneType' object has no attribute 'split'

[edelmann]

I sometimes see this kinds of errors in the logs:

2015-04-17 16:06:53+0200 [HTTPChannel,48,127.0.0.1] Unhandled Error
Traceback (most recent call last):
File "/usr/lib/python2.7/dist-packages/twisted/web/http.py", line 1438, in dataReceived
finishCallback(data[contentLength:])
File "/usr/lib/python2.7/dist-packages/twisted/web/http.py", line 1667, in _finishRequestBody
self.allContentReceived()
File "/usr/lib/python2.7/dist-packages/twisted/web/http.py", line 1730, in allContentReceived
req.requestReceived(command, path, version)
File "/usr/lib/python2.7/dist-packages/twisted/web/http.py", line 826, in requestReceived
self.process()
--- ---
File "/usr/lib/python2.7/dist-packages/twisted/web/server.py", line 189, in process
self.render(resrc)
File "/usr/lib/python2.7/dist-packages/twisted/web/server.py", line 238, in render
body = resrc.render(self)
File "/usr/lib/python2.7/dist-packages/twisted/web/resource.py", line 250, in render
return m(request)
File "/usr/local/lib/python2.7/dist-packages/sgas/server/insertresource.py", line 81, in render_POST
d = self.insertRecords(data, subject, hostname)
File "/usr/local/lib/python2.7/dist-packages/sgas/server/insertresource.py", line 95, in insertRecords
d = inserter.insertJobUsageRecords(data, self.db, self.authorizer, subject, hostname)
File "/usr/local/lib/python2.7/dist-packages/sgas/database/inserter.py", line 40, in insertJobUsageRecords
if authorizer.isAllowed(insert_identity, rights.ACTION_JOB_INSERT, ctx):
File "/usr/local/lib/python2.7/dist-packages/sgas/authz/engine.py", line 177, in isAllowed
if ctx_checker.contextCheck(subject, user_action_rights.contexts, context):
File "/usr/local/lib/python2.7/dist-packages/sgas/authz/ctxinsertchecker.py", line 61, in contextCheck
ic_parts = [ p for p in ic.split('.') if p != '' ]
exceptions.AttributeError: 'NoneType' object has no attribute 'split'

It happens for the clusters abisko-ce.hpc2n.umu.se and atlas.triolith.nsc.liu.se. When these clusters tries to insert stuff, 'action_context' in contextCheck() in sgas/authz/ctxinsertchecker.py has values like

[('machine_name', None), ('machine_name', 'atlas.triolith.nsc.liu.se')]

For other clusters, 'action_context' tend to be something like e.g.

[('machine_name', 'ce02.grid.uio.no')]

Whether the bug is that 'action_context' has those None:s in it to start with, or if it is that contextCheck() can't handle those situations, I don't know.