Hello,
I have the following Problem in /opt/atlassian/confluence/logs/catalina.out
"[ajp-nio-8009-exec-10] org.apache.coyote.ajp.AjpMessage.processHeader Invalid message received with signature 18245"
### AJP in Server.xml
<Connector port="8009"
URIEncoding="UTF-8"
enableLookups="false"
protocol="org.apache.coyote.ajp.AjpNioProtocol"
connectionTimeout="20000"
redirectPort="8443"
maxThreads="150"
minSpareThreads="10"
acceptCount="10"
debug="0"
/>
### on Apache
ProxyRequests Off
ProxyPass /x/y ajp://confluence-Server:8009/x/y
ProxyPassReverse /x/y ajp://confluence-Server:8009/x/y