AuthorTopic: Session Error
jenns
@2004-05-08 16:04:57
I frequently encounter Session Errors while I am in the middle of a Study Session. For example, I just got one now five minutes into the session. I emailed Mike about this but I was also wondering if anyone else is having this problem. It makes doing the study sessions very challenging because at any minute the site could give me an error and lose all of my work.
jenns
@2004-05-08 16:13:59
Now, in the middle of taking a test I got the following:


Warning: mysql_num_rows(): supplied argument is not a valid MySQL result resource in /home/virtual/site26/fst/var/www/html/2004/html/exam.inc on line 87

Fatal error: Call to undefinted function: show_no_question_available() in /home/virtual/site26/fst/var/www/html/2004/html/exam.inc on line 88.

Is something wrong with my computer or is this a problem with CFACenter. I would really like to be able to study.

Thanks,
Jennifer
cpamba
@2004-05-08 18:19:34
I do get kicked off frequently with the notation:Session Error. This seems to occur when I switch from Study section to Forum and then try to go back to the Study section or Mock exams. I do not get any message like you describe however.

Though getting kicked off and having to wait 20 minutes to log back on is frustrating.
shawnfuller
@2004-05-09 12:02:06
From my web development experience this seems like a problem with mysql database. One possible reason is that every mysql database has a limit of max number of concurrent connections. The default is 100. If that's reached such an error will occur. Another possible reason is the connection pool (if cfacenter uses one) with mysql: there is a known bug with mysql that every several hours it drops a connection so any connecting attempy will fail at that point.
Admin
@2004-05-10 00:14:07
Thanks Shawn. That's exactly what's going on. We actually have one primary server and one backup server for failover, but sometimes bad things still happen... Our site access log shows that on average 0.43% of all requests fail: that's acceptable in our mind.

FYI: every click is a http request. Typically a user makes hundreds of http requests during a visit.

We apologize for any inconvenience this may have caused you.
cpamba
@2004-05-15 23:21:24
I have been kicked off with the session error several times this evening, no sooner than I logged on. Rather frustrating, primarily because you have to wait 20 minutes to have the opportunity to get back.

Can something be done?
Tomm
@2004-05-31 14:06:58
After a long delay following a click on the level one tab I am now locked out of the tab and cannot access any of the questions. When I click I get the CFA Center index page and I click the arrow and it brings me to the home page. Each time I then click the level one tab it repeats this vicious cycle.

Please help me!!

CFA Discussion Topic: Session Error

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I just wanted to share the good news that I passed CFA Level I!!! Thank you for your help - I think the online question bank helped cut the clutter and made a positive difference.
Edward Liu

Edward Liu