What is workers properties?
properties. Apache HTTP Server worker nodes are Servlet containers that are mapped to the mod_jk load balancer. The worker nodes are defined in JWS_HOME/httpd/conf/workers. This file specifies where the different Servlet containers are located, and how calls should be load-balanced across them. …
What is mod_jk and Mod_proxy?
AJP vs HTTP When using mod_jk , you are using the AJP . When using mod_proxy you will use HTTP or HTTPS . And this is essentially what makes all the difference.
What is Lbfactor?
The lbfactor attribute is the load-balancing factor for this specific worker. It is used to define the priority (or weight) a node should have over other nodes. The higher this number is for a given worker relative to the other workers, the more HTTP requests the worker will receive.
What is JK status?
The JK status manager is an administration interface for mod_jk. Due to discrepancies between the specifications of httpd and Tomcat for path resolution, Apache mod_jk Connector 1.2. 44 access controls to endpoints defined by a JkMount httpd directive can be bypassed.
What is maxThreads in Tomcat?
By default, Tomcat sets maxThreads to 200, which represents the maximum number of threads allowed to run at any given time. You can also specify values for the following parameters: minSpareThreads : the minimum number of threads that should be running at all times. This includes idle and active threads.
What is JK in Tomcat?
The JK Connector is a web server component used to invisibly integrate Tomcat with a web server such as Apache or IIS. Communication between the web server and Tomcat is via the JK protocol (also known as the AJP protocol).
What is mod_jk used for?
mod_jk is an Apache module used to connect the Tomcat servlet container with web servers such as Apache, iPlanet, Sun ONE (formerly Netscape) and even IIS using the Apache JServ Protocol. A web server waits for client HTTP requests.
What is the difference between mod_jk and Mod_cluster?
Like mod_jk and mod_proxy, mod_cluster uses a communication channel to forward requests from the load balancer to one of a set of application server nodes. Unlike mod_jk and mod_proxy, mod_cluster leverages an additional connection between the application server nodes and the load balancer.
What is JK status manager?
JK provides a management and diagnostics web application called jkstatus that is often activated under the web application path /jkstatus. The jkstatus application, in addition to allowing remote users to start, stop, and reconfigure the JK connector, allows remote clients to view detailed configuration information.
What is JK manager?
Jk Manager is an administration tool (graphical interface and API) for the Apache mod_jk plugin providing : some monitoring informations such as statistics and status about the workers. some operations such as the smooth worker disabling.
What is minSpareThreads in Tomcat?
By default, Tomcat sets maxThreads to 200, which represents the maximum number of threads allowed to run at any given time. minSpareThreads : the minimum number of threads that should be running at all times. This includes idle and active threads. The default value is 10.
What is executor in Tomcat?
Introduction. The Executor represents a thread pool that can be shared between components in Tomcat. Historically there has been a thread pool per connector created but this allows you to share a thread pool, between (primarily) connector but also other components when those get configured to support executors.
When to use the keepalive property in an application?
An application uses KeepAlive to indicate a preference for persistent connections. When the KeepAlive property is true, the application makes persistent connections to the servers that support them.
What does keepalive mean in HTTP / 1.1?
An application uses KeepAlive to indicate a preference for persistent connections. When the KeepAlive property is true, the application makes persistent connections to the servers that support them. When using HTTP/1.1, Keep-Alive is on by default. Setting KeepAlive to false may result in sending a Connection: Close header to the server.
When to set the keep-alive property to true?
Set this property to true to send a Connection HTTP header with the value Keep-alive. An application uses KeepAlive to indicate a preference for persistent connections. When the KeepAlive property is true, the application makes persistent connections to the servers that support them.
How to tell if a worker is a local worker?
The local_worker flag on worker1 and worker2 tells the lb_worker which connections are going to the local worker. If local_worker is an int and is not 0 it is set to JK_TRUE and marked as local worker, JK_FALSE otherwise. If in minimum one worker is marked as local worker, lb_worker is in local worker mode.