For Load Balancer, the advisorrequest/advisorresponse parameters are valid for both HTTP and HTTPS advisors
 Technote (troubleshooting)
 
Problem(Abstract)
You can configure the HTTP advisor or the HTTPS advisor using the request/response (URL) option on the "dscontrol server" command.
 
Resolving the problem
In the v5 Load Balancer Administration Guide, in the chapter on Manager, Advisors, and Metric Server functions, the advisorrequest and advisorresponse parameters for the dscontrol server command have references only to the HTTP advisor. However, these parameters are valid for both HTTP and HTTPS advisors.
By default, the HTTPS advisor looks for the string 200 OK in response to its HTTP request. In some situations, the server HTTP response does not contain the string 200 OK, in which case the HTTPS advisor marks the server down.

Example: Caching Proxy v5.1 responds to the HTTPS advisor's HTTP request with the following string:
Received >>>HTTP/1.1 200 Document follows<<<
Received >>>Last-Modified: Wed, 17 Sep 2003 23:15:43 GMT<<<
Received >>>Content-Length: 2702<<<
Received >>>Content-Type: text/html<<<
Received >>>Content-Location: Frntpage.html<<<
Received >>>Accept-Ranges: bytes<<<
Received>>>Connection: Keep-Alive<<<
Received >>>Date: Wed, 01 Oct 2003 16:27:45 GMT<<<
Received >>>Server: IBM-PROXY-WTE/5.1<<<

Since the response from Caching Proxy does not contain the default-expected advisor response of 200 OK, the HTTPS advisor marks the server down, even though it is really up.

Using the above server HTTP response as an example, use the following command to define the expected HTTP response for the HTTPS advisor:

server set [cluster1+ c2+...]:[port1+ p2 +...]:[ server1+ s2 +...] advisorresponse "HTTP/1.1 200 Document"

Now when the HTTP server responds to the HTTPS advisor's HTTP request, the advisor will find the expected string and mark the server up.
 
 
Cross Reference information
Segment Product Component Platform Version Edition
Application Servers Runtimes for Java Technology Java SDK
 
Historical Number
85592
 
 


Document Information


Product categories: Software > Application Servers > Distributed Application & Web Servers > WebSphere Application Server > Edge Component
Operating system(s): Windows
Software version: 5.0
Software edition:
Reference #: 1154678
IBM Group: Software Group
Modified date: Dec 12, 2003