On 2/7/12 1:28 PM, William Stein wrote:
On Tue, Feb 7, 2012 at 10:51 AM, Jason Grout
<[email protected]> wrote:
On 2/7/12 12:17 PM, Brad Burkman wrote:
I'm having a new and serious problem using Sage online.
When I click "evaluate," it pauses for a second and I get the green
bar, but then no output.
Really basic stuff like 2+3, but also plot( x, (0,1)). No output.
I'm having the same trouble at the shodor server and at sagenb.org,
with IE9, Firefox, and Chrome, on different computers running Windows
and Ubuntu, on my school's faculty wireless, student wireless,
hard-wired connection, and the wireless at the library next door
(different internet connection).
I'm having no trouble using a local copy of Sage.
I updated my Java (Iced Tea). No effect.
Suggestions? I'm trying to use Sage with my Precalculus class.
I saw this too about an hour or two ago. I restarted sagenb.org and the
problem went away. Have you tried in the last hour or so?
This sounds like the symptom we get when there are a very large number
of users, hence processes, and the system isn't allowed to start
anymore (e.g., can't allocate pseudotty's). Jason -- did you do
anything before the restart to check on this, e.g, "./admin --status"
or "ps -u sagenbws |wc -l"?
./admin --status showed something like 372 processes for sagenb.org. I
didn't do a ps. The error message posted on the other thread [1] seemed
to be the cause for no output---there was an error in appending the
computation to the user's history.
Thanks,
Jason
[1] For those interested, the errors were like this:
File
"/sagenb/sage_install/sage-4.7.2/devel/sagenb/flask_version/worksheet.py",
line 455, in worksheet_cell_update
g.notebook.add_to_user_history(H, g.username) File
"/sagenb/sage_install/sage-4.7.2/devel/sagenb-git/sagenb/notebook/notebook.py",
line 710, in add_to_user_history
history = self.user_history(username) File
"/sagenb/sage_install/sage-4.7.2/devel/sagenb-git/sagenb/notebook/notebook.py",
line 690, in user_history return self._user_history[username]
exceptions.KeyError: u'jasontest'
The errors started yesterday, and there were lots of these errors. I'm
not sure of the cause.
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