f7744b72_e__8_0_24____The_AJP_Connector__Description
[Attribute] executorTerminationTimeoutMillis [Description] 
The time that the private internal executor will wait for request processing threads to terminate before continuing with the process of stopping the connector. If not set, the default is 0 (zero) for the BIO connector and 5000 (5 seconds) for the NIO, NIO2 and APR/native connectors.
Apache Tomcat 8 Configuration Reference (8.0.24) - The AJP Connector