Tomcat Version : Apache Tomcat/8.5.51
By Default AJP Connector error appears, to fix add the parameter secretRequired=”false” to server.xml and restart
<Connector port=”8009″ protocol=”AJP/1.3″ redirectPort=”8443″ secretRequired=”false”/>
03-Mar-2020 16:21:46.011 INFO [main] org.apache.coyote.AbstractProtocol.start Starting ProtocolHandler [“http-nio-8080”]
03-Mar-2020 16:21:46.020 SEVERE [main] org.apache.catalina.core.StandardService.startInternal Failed to start connector [Connector[AJP/1.3-8009]]
org.apache.catalina.LifecycleException: Protocol handler start failed
at org.apache.catalina.connector.Connector.startInternal(Connector.java:1057)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)
at org.apache.catalina.core.StandardService.startInternal(StandardService.java:440)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)
at org.apache.catalina.core.StandardServer.startInternal(StandardServer.java:766)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)
at org.apache.catalina.startup.Catalina.start(Catalina.java:688)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:343)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:474)
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.
at org.apache.coyote.ajp.AbstractAjpProtocol.start(AbstractAjpProtocol.java:274)
at org.apache.catalina.connector.Connector.startInternal(Connector.java:1055)
… 12 more
03-Mar-2020 16:21:46.021 INFO [main] org.apache.catalina.startup.Catalina.start Server startup in 42 ms