Reason for error:
An incompatible version 1.1.14 of APR based Apache Tomcat Native library is installed, while Tomcat requires version 1.1.24.
Solution:
APR is the abbreviation of Apache Portable Runtime. It is an optional component of tomcat. The use of this engineering component in tomcat improves stability and performance, especially when tomcat is also used for web servers. According to the online method, in http ://archive.apache.org/dist/tomcat/tomcat-connectors/native downloaded version 1.1.24, copied it to the bin folder of the tomcat directory, restarted tomcat, but this warning still appeared in the tomcat startup log, Then I copied the dll file to the bin folder under jdk and the bin folder under jre, restarted again, and the warning was gone.
Tomcat component download address:
http://archive.apache.org/dist/tomcat/tomcat-connectors/native/
Find the component corresponding to your version and add it to the jdk, jre directory.
Note: tomcat 8 comes with its own components and does not need to be copied to its directory, other unknown.