Verifying the configuration
For an HTTP callout to work correctly, all the HTTP callout parameters and the entities associated with the callout must be configured correctly. While the Citrix ADC appliance does not check the validity of the HTTP callout parameters, it indicates the state of the bound entities, namely the server or virtual server to which the HTTP callout is sent. The following table lists the icons and describes the conditions under which the icons are displayed.
Icon |
Indicates that |
![localized image](//m.giftsix.com/docs/en-us/citrix-adc/media/nav_up_green_1.png) |
The state of the server that hosts the HTTP callout agent, or the load balancing, content switching, or cache redirection virtual server to which the HTTP callout is sent is UP. |
![localized image](//m.giftsix.com/docs/en-us/citrix-adc/media/nav_down_yellow_1.png) |
The state of the server that hosts the HTTP callout agent, or the load balancing, content switching, or cache redirection virtual server to which the HTTP callout is sent is OUT OF SERVICE. |
![localized image](//m.giftsix.com/docs/en-us/citrix-adc/media/nav_down_red_1.png) |
The state of the server that hosts the HTTP callout agent, or the load balancing, content switching, or cache redirection virtual server to which the HTTP callout is sent is DOWN. |
Table 1. Icons That Indicate the States of Entities Bound to an HTTP Callout
For an HTTP callout to function correctly, the icon must be green at all times. If the icon is not green, check the state of the callout server or virtual server to which the HTTP callout is sent. If the HTTP callout is not working as expected even though the icon is green, check the parameters configured for the callout.
You can also verify the configuration by sending test requests that match the policy from which the HTTP callout is invoked, checking the hits counter for the policy and the HTTP callout, and verifying the responses that the Citrix ADC appliance sends to the client.
Note: An HTTP callout can sometimes invoke itself recursively a second time. If this happens, the hits counter is incremented by two counts for each callout that is generated by the appliance. For the hits counter to display the correct value, you must configure the HTTP callout in such a way that it does not invoke itself a second time. For more information about how you can avoid HTTP callout recursion, seeAvoiding HTTP Callout Recursion.
To view the hits counter for an HTTP callout
- Navigate toAppExpert>HTTP Callouts.
- In the details pane, click the HTTP callout for which you want to view the hits counter, and then view the hits in theDetailsarea.
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