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Appendix B. Java Properties Reference
B.1. Proxy Configuration
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The configuration values are sent to proxies under the following conditions:
- During server startup
- When a proxy is detected through the advertise mechanism
- During error recovery, when a proxy's configuration is reset.
| Value | Default | Description |
|---|---|---|
| stickySession | true | Specifies whether subsequent requests for a given session should be routed to the same node, if possible. |
| stickySessionRemove | false | Specifies whether the httpd proxy should remove session stickiness if the balancer is unable to route a request to the node to which it is stuck. This property is ignored if stickySession is false. |
| stickySessionForce | true | Specifies whether the httpd proxy should return an error if the balancer is unable to route a request to the node to which it is stuck. This property is ignored if stickySession is false. |
| workerTimeout | -1 | Specifies the number of seconds to wait for a worker to become available to handle a request. When all the workers of a balancer are unusable, mod_cluster will retry after a while (workerTimeout/100) to find an usable worker. A value of -1 indicates that the httpd will not wait for a worker to be available and will return an error if no workers are available. |
| maxAttempts | 1 | Specifies the number of times the httpd proxy will attempt to send a given request to a worker before aborting. The minimum value is 1: try once before aborting. |
| flushPackets | false | Specifies whether packet flushing is enabled or disabled. |
| flushWait | -1 | Specifies the time to wait before flushing packets. A value of -1 means wait forever. |
| ping | 10 | Time to wait (in seconds) for a pong answer to a ping. |
| smax | - | Specifies the soft maximum idle connection count. The maximum value is determined by the httpd thread configuration (ThreadsPerChild or 1). |
| ttl | 60 | Specifies the time (in seconds) idle connections persist, above the smax threshold. |
| nodeTimeout | -1 | Specifies the time (in seconds) mod_cluster waits for the back-end server response before returning an error. mod_cluster always uses a cping/cpong before forwarding a request. The connectiontimeout value used by mod_cluster is the ping value. |
| balancer | mycluster | Specifies the name of the load-balancer. |
| loadBalancingGroup | - | Specifies the load balancing among jvmRoutes within the same load balancing group. A loadBalancingGroup is conceptually equivalent to a mod_jk domain directive. |
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