Hello, we have the problem, that our sage otebook server crashes from time to time. We use Version 6.3.
This happens at a time when about 10 or 12 students login at about the same time. When this happens, the webinterface (Apache virtual Host) shows "Service Temporarily unavailable" in the website. The complete server has to be rebooted.
Log file of the last crash is attached, the server was rebooted after the crash, which is also shown in the logfile. So the last error is, that a user cannot be found.
I tried to replicate the error. What I found is a weird behaviour of the login screen when given wrong usernames:
If the username is numeric: 12121312312 -> "Error: Username is not in the system " is shown in the login screen
If the username is alphanumeric and begins with a number: 534534534gfdgdfg -> "Error: Username is not in the system " is shown in the login screen
If the username is alphanumeric and begins with a char and is only 2 char long: bb or b3 -> "Error: Username is not in the system " is shown in the login screen
If the username is alphanumeric and begins with a char and is longer than 2 chars: gfdgdfg312312 -> I get a blank screen in the Browser (maybe ERROR 500?) and an entry in the log file,
And I think this may leed to a complete crash of the notebook server from time to time, too.
This posting shows the same problem: https://www.mail-archive.com/sage-devel@googlegroups.com/msg71212.html
Does anyone have a tip, solution or the same problem?
2014-10-23 12:07:32+0200 [-] WSGI application error
Traceback (most recent call last):
File "/opt/sage6.3/local/lib/python2.7/site-packages/Twisted-13.2.0-py2.7-linux-x86_64.egg/twisted/python/threadpool.py", line 212, in _worker
o = self.q.get()
File "/opt/sage6.3/local/lib/python2.7/site-packages/Twisted-13.2.0-py2.7-linux-x86_64.egg/twisted/python/context.py", line 118, in callWithContext
return self.currentContext().callWithContext(ctx, func, *args, **kw)
File "/opt/sage6.3/local/lib/python2.7/site-packages/Twisted-13.2.0-py2.7-linux-x86_64.egg/twisted/python/context.py", line 83, in callWithContext
self.contexts.pop()
File "/opt/sage6.3/local/lib/python2.7/site-packages/Twisted-13.2.0-py2.7-linux-x86_64.egg/twisted/web/wsgi.py", line 340, in run
self.started = True
--- <exception caught here> ---
File "/opt/sage6.3/local/lib/python2.7/site-packages/Twisted-13.2.0-py2.7-linux-x86_64.egg/twisted/web/wsgi.py", line 315, in run
appIterator = self.application(self.environ, self.startResponse)
File "/opt/sage6.3/local/lib/python2.7/site-packages/Flask-0.10.1-py2.7.egg/flask/app.py", line 1836, in __call__
return self.wsgi_app(environ, start_response)
File "/opt/sage6.3/local/lib/python2.7/site-packages/Flask-0.10.1-py2.7.egg/flask/app.py", line 1820, in wsgi_app
response = self.make_response(self.handle_exception(e))
File "/opt/sage6.3/local/lib/python2.7/site-packages/Flask-0.10.1-py2.7.egg/flask/app.py", line 1403, in handle_exception
reraise(exc_type, exc_value, tb)
File "/opt/sage6.3/local/lib/python2.7/site-packages/Flask-0.10.1-py2.7.egg/flask/app.py", line 1817, in wsgi_app
response = self.full_dispatch_request()
File "/opt/sage6.3/local/lib/python2.7/site-packages/Flask-0.10.1-py2.7.egg/flask/app.py", line 1477, in full_dispatch_request
rv = self.handle_user_exception(e)
File "/opt/sage6.3/local/lib/python2.7/site-packages/Flask-0.10.1-py2.7.egg/flask/app.py", line 1381, in handle_user_exception
reraise(exc_type, exc_value, tb)
File "/opt/sage6.3/local/lib/python2.7/site-packages/Flask-0.10.1-py2.7.egg/flask/app.py", line 1475, in full_dispatch_request
rv = self.dispatch_request()
File "/opt/sage6.3/local/lib/python2.7/site-packages/Flask-0.10.1-py2.7.egg/flask/app.py", line 1461, in dispatch_request
return self.view_functions[rule.endpoint](**req.view_args)
File "/opt/sage6.3/local/lib/python2.7/site-packages/sagenb-0.10.8.2-py2.7.egg/sagenb/flask_version/authentication.py", line 42, in login
U = g.notebook.user_manager().user(username)
File "/opt/sage6.3/local/lib/python2.7/site-packages/sagenb-0.10.8.2-py2.7.egg/sagenb/notebook/user_manager.py", line 112, in user
return self._user(username)
File "/opt/sage6.3/local/lib/python2.7/site-packages/sagenb-0.10.8.2-py2.7.egg/sagenb/notebook/user_manager.py", line 522, in _user
raise LookupError("no user '{}'".format(username))
exceptions.LookupError: no user 'dsadsa'
Attaching gdb to process id 1317.
Unable to start gdb (not installed?)
GDB is not installed.
Install the gdb spkg (sage -f gdb) for enhanced tracebacks.
The notebook files are stored in: sage_notebook.sagenb
┌────────────────────────────────────────────────┐
│ │
│ Open your web browser to http://localhost:8000 │
│ │
└────────────────────────────────────────────────┘
Executing twistd --pidfile="sage_notebook.sagenb/sagenb.pid" -ny "sage_notebook.sagenb/twistedconf.tac"
User sageserver
2014-10-23 12:11:03+0200 [-] Log opened.
2014-10-23 12:11:03+0200 [-] twistd 13.2.0 (/opt/sage6.3/local/bin/python 2.7.8) starting up.
2014-10-23 12:11:03+0200 [-] reactor class: twisted.internet.epollreactor.EPollReactor.
2014-10-23 12:11:03+0200 [-] QuietSite starting on 8000
2014-10-23 12:11:03+0200 [-] Starting factory <__builtin__.QuietSite instance at 0x7f31277c4bd8>
