chemicals in bottles

Server Health Check for Load Balanced Environments

http://kb.blackboard.com/display/KB/Server+Health+Check+for+Load+Balanced+Environments In 9.1 there is a new servlet which allows users to determine whether an application server is running correctly. This is particularly useful for load balanced clients who can check the status of each of the servers. This lightweight servlet avoids creating unnecessary Blackboard sessions in the database and is now the officially recommended choice for a server health monitoring URL. To use this tool, users can use the following URL to verify server health: 

http://<your_servername>/webapps/portal/healthCheck
(note the capital “C”) If the server is up and running you will see output similar to: 
Hostname: <your_url>
Status: Active - Database connectivity established
Running since: Tue, Sep 21, 2010 - 09:26:00 AM EDT
Time of request: Fri, Sep 24, 2010 - 12:25:21 AM EDT
Clustering: disabled
If the tool is unsuccessful in processing because of database-related problems (response is sent with an http status code 503): 
Hostname: <your_url>
Status: Service unavailable. An exception occurred either while trying to connect to or querying the database
Running since: Fri, Oct 2, 2009 - 02:20:48 PM EDT Time of request: Fri, Oct 2, 2009 - 02:20:48 PM EDT
Clustering: disabled
Exception: [stack trace...]
Or if there is another issue, a 503 error will display with a stack trace.]]>