f7744b72_e__8_0_24____The_AJP_Connector__Description
[Attribute] executor [Description] 
A reference to the name in an Executor element. If this attribute is set, and the named executor exists, the connector will use the executor, and all the other thread attributes will be ignored. Note that if a shared executor is not specified for a connector then the connector will use a private, internal executor to provide the thread pool.
Apache Tomcat 8 Configuration Reference (8.0.24) - The AJP Connector