[LON-CAPA-admin] Problem possibly involving "multiple attempts"?
korte at lite.msu.edu
Mon Jun 23 13:11:53 EDT 2008
The most likely reason is spyware.
The second most likely is cookies expiring too quickly or not being
The third most likely is an ill-configured webcache server on the
network. Some providers and schools have a webcache on their
boundaries that attempts to "speed up" network traffic into the
domain by caching the pages and intercepting the requests. LON-CAPA
sends out headers and expiration dates that should tell every well-
configured webcache server to NOT cache the pages, but some webcaches
are not well-configured.
On Jun 23, 2008, at 12:42 PM, Neubauer, Paul R. wrote:
> Hi folks,
> Has anyone else had a problem similar to this?
> We had a couple of students yesterday (Sunday) afternoon who both
> reported being unable to do assignments. The system load was light.
> One student reported "it will say "successful login" but then
> nothing else will load and it won't let me access other parts of
> the site." Another said that the system "consistently freezes up,
> kicks me off, or doesn't allow me to submit an answer." The second
> later reported that "It seems that it has trouble registering every
> time I get an answer incorrect when it allows multiple attempts.
> The program is perfect when answers are correct, but when I get
> many chances it likes to freeze up." I don't know if the first of
> the two noticed anything similar, but they were in the same class
> and doing similar assignments.
> I notice that both of these students got a significant number of
> "302" http return codes (for multiple questions) and I don't know
> if that is possibly related. OTOH, I did a "grep -c " 302 " acc* "
> to see if the number of 302s was abnormally high, and it seemed to
> be pretty comparable for the current access_log and for past logs
> (compared to the number of lines in the logs), so I'm not
> particularly convinced that this had anything to do with the
> problems they were experiencing.
> Both of the students said that they had not had this problem in the
> past, so I can't tell if it was something to do with the specific
> assignment or something else.
> We're still running lon-capa version 2.5.3.
> Does any of this ring any bells?
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