CSS 11503 Service Keepalives

tulletts · ‎10-29-2004

I have a CSS11503 running s/w version 7.10 Build 504.

The problem I am having is that wehn the CSS detects webservice has failed and marks it as down, The CSS does not recognise when the Web Service comes back online. We have to manually go intio the service , suspend and then re-activate.

Any ideas ?

Here is a service config :-

service DataMarker-A

ip address 192.168.57.130

keepalive uri "http://192.168.57.130/"

redundant-index 8

keepalive method get

keepalive retryperiod 4

keepalive frequency 3

keepalive maxfailure 2

active

Gilles Dufour · ‎10-29-2004

first, I just want to point out that your keepalive uri should be "/" and not the complete url.

Then, when the server comes back alive, are you sure the content of the page did not change ?

The GET method will hash the page and compare it wih the previous hash. If it is different, the server is kept down.

I would recommend to use HEAD instead of GET unless your server does not support HEAD.

So, could you confirm the page content did not change ? Could you capture a 'sho keepalive auto_...' and 'show service ' for the service showing the problem at the time you experience the issue.

Regards,

Gilles.

tulletts · ‎10-29-2004

Hello Gilles

Firstly, I can confirm that the page would have changed as it a Financial Trading App. so prices are changing all the time.

Here is the Show Service command

CSS-LDN-DMZE3-A# show service DataMarker-A

Name: DataMarker-A Index: 1

Type: Local State: Alive

Rule ( 192.168.57.130 ANY ANY )

Session Redundancy: Enabled

Redundancy Global Index: 8

Redirect Domain:

Redirect String:

Keepalive: (ICMP 3 2 4 )

Last Clearing of Stats Counters: 28/08/2004 11:38:57

Mtu: 1500 State Transitions: 72

Total Local Connections: 10 Total Backup Connections: 0

Current Local Connections: 0 Current Backup Connections: 0

Total Connections: 10 Max Connections: 65534

Total Reused Conns: 0

Weight: 1 Load: 2

DFP: Disable

And here is the show keepalive auto

Name: AUTO_DataMarker-A Index: 1 State: Alive

Description: Auto generated for service DataMarker-A

Address: 192.168.57.130 Port: Any

Type: ICMP

Frequency: 3

Max Failures: 2

Retry Frequency: 4

Dependent Services:

DataMarker-A

I have taken you advice and amended my URL to "/" and changed the method to Head.

Cheers

Mike