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The secretRequired="false" option added to AJP connector is server.xml. However, the connector does not start with Protocol handler start failed error. It is behind an Apache Server version 2.4.25.
<Connector port="8009"
address="127.0.0.1" tomcatAuthentication="false" URIEncoding="UTF-8" enableLookups="false"
protocol="AJP/1.3" redirectPort="8663" connectionTimeout="600000" secretRequired="false" />
The error:
Caused by: java.lang.IllegalArgumentException: The AJP Connector is configured with secretRequired="true" but the secret attribute is either null or "". This combination is not valid.
Thanks
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IMPORTANT NOTE: The AJP/1.3 Connector is now deprecated.
AJP connectors Apache JServ Protocol, or AJP, is an optimized binary version of HTTP that is typically used to allow Tomcat to communicate with an Apache web server.
a)Navigate to the folder C:\Program Files\Apache Software Foundation\[ Tomcat folder ]\bin and run Tomcat9w.exe. b)In the General tab set Startup Type to Automatic and press Start. c)Click the Java tab, make sure Use default is deselected and Java Virtual Machine includes the path to jvm.
Adding the address attribute and specifying the loopback address is what worked for me on Tomcat 8.5.54.
<Connector port="8009" protocol="AJP/1.3" redirectPort="8443" address="0.0.0.0" secretRequired="false" />
Tomcat 9.0.34 has that secretReqiured set to true by default now to address CVS issue.
See these URLs for details of this issue:https://access.redhat.com/solutions/4851251
https://tomcat.apache.org/tomcat-9.0-doc/config/ajp.html
https://github.com/spring-projects/spring-boot/issues/20377
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