Perhaps I am overlooking something, but the documentation for AJP [1] states for "protocol"
<quote> The standard protocol value for an AJP connector is AJP/1.3 which uses an auto-switching mechanism to select either a Java based connector or an APR/native based connector. If the PATH (Windows) or LD_LIBRARY_PATH (on most unix systems) environment variables contain the Tomcat native library, the native/APR connector will be used. If the native library cannot be found, the Java based connector will be used. </quote> The text above doesn't describe what is the auto-selected protocol when a Java based connector is selected. My guess is that "org.apache.coyote.ajp.AjpNioProtocol" will be auto-selected since BIO is on its way out but since the documentation doesn't explicitly state it, it leaves the reader to wonder. George [1] https://tomcat.apache.org/tomcat-7.0-doc/config/ajp.html
