SPS Tomcat threads amount increase lead to be unresponsive

Products

• CA Single Sign On Secure Proxy Server (SiteMinder)
• SITEMINDER

Issue/Introduction

 

CA Access Gateway (SPS) 12.8 SP1 is newly installed and configured. The SPS Tomcat thread count increase is observed. Eventually, it results in a situation where SSO became unavailable and unresponsive.
 
Observation of Tomcat threads count:

  - 6/17: 57 (after SPS startup)
  - 6/24: 76
  - 9/1: SPS was restarted
  - 10/16: 255

Environment

 

CA Access Gateway (SPS) 12.8SP1

 

Resolution

 

As for the tuning parameters in the server.conf, below settings, was found (1).

  worker.ajp13.connection_pool_timeout=0

This sets the Maximum time (seconds) that the idle connections will remain in the connection pool before timing out, the default value is 0 which means never time out.

By setting worker.ajp13.connection_pool_timeout to some value such as an 600 ( 10 min ), thread count could stabilize.

 

Additional Information

 

(1)

    Configure the Tomcat Settings Manually