title: invalid message signature AJP 514
body: <h1>We are facing issue with the large request-header. Recently we came to know that some of the large cookies got sent to the server which goes beyond the default limit of 8192. We tried to bump max_packet_size in workers.properies(mod_jk) as well as tomcat's AJP connector(packet size) to 65536. Now request is getting throuh to the tomcat but in tomcat's Catalina.out we are getting SERVER log message:</h1>
  
  <h1>28-Feb-2018 22:23:34.137 SEVERE [ajp-nio-7009-exec-5] org.apache.coyote.ajp.AjpMessage.processHeader Invalid message received with signature 514</h1>
  
  <p>Our server setup flow is something like:
  ELB ->(https) -> httpd -> mod_jk+AJP13 ->(http) -> tomcat.
  Tomcat version: 8.0.20
  httpd version: 2.4.27 
  mod_jk version: 1.2.37
  Please help us to find the root cause.</p>