The correct CHPWLN account number is not accepted; can't get to login page; data tier status is "Server Down"
| Article ID |
3199 |
| Product |
Client-Hosted PLATO Web Learning Network |
| Issue |
You enter the account number at the CHPWLN account prompt, but the login page never displays, and the "Invalid Account ID" does NOT appear. Instead, account number prompt reappears. Double-clicking version in lower left shows that DataTier status "*Server Down (see HTML comments)." |
| Resolution |
Restart all Web server services or all CHPWLN servers (system admin only) |
Details
Resolution
Sometimes one or more services used to launch lessons on the web server are not working, even when the service appears to be up and running.
If you are a teacher, contact your school, district or system administrator to do this.
IT Staff/Network Administrator: Restart the data server or start any CHPWLN services running on the data server that are stopped.
The services required for CHPWLN are listed below:
Database Server:
- PLATO Data Server (SQL)
- PLATO User Data Server
- SQLServerAgent
Web Server:
- PLATO Courseware Launcher
- PLATO iPlato Dispatcher
- PLATO Web Learning Network Web Services (port 82)
- PLATO Web Learning Network Web Services (port83)
World Wide Web Publishing Server (WWW)
The World Wide Web Publishing Server should be set to Automatic Startup. Anytime you update the server with courseware add-ons or other patches, you should restart the services or restart the server.
Note: Your configuration may have some or all of these server functions combined onto a single server.
To view the status of CHPWLN server services from a workstation:
- On the login page, select if this is not your account number, click here. You may also get to this page by selecting Click here to try again from an error screen.
- In the lower left corner, double-click on Version.
You will see a display of the status of the CHPWLN server components needed to run the PWLN courseware successfully. In the example below, the DataTier status shows that the server is down. The message is: "*Server Down (see HTML comments)":
Manually start and stop the services in Services under Administrator Tools or restart the server, which will restart the services.
An alternate method is to create a batch file containing the following, along with a scheduled task to run the batch file nightly (this example refers to the services running on the Web server):
sc stop "iPLATODispatch"
sc stop "PLATO_MT_82"
sc stop "PLATO_MT_83"
sc stop "CWL"
sleep 60
sc start "iPLATODispatch"
sc start "PLATO_MT_82"
sc start "PLATO_MT_83"
sc start "CWL"
We recommend that you restart the servers every night to prevent the services from hanging in a suspended state. Also, restarting the server will help prevent high memory utilization problems.
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