Proxy Request Timeout Errors in Apache HTTPD with mod_cluster

Issue

• Requests are failing because they are hitting a mod_cluster proxy timeout

  [Sun Jan 01 00:00:00.000000 1900] [proxy_ajp:error] [pid 99999] (70007)The timeout specified has expired: AH01030: ajp_ilink_receive() can't receive header
  [Sun Jan 01 00:00:00.000000 1900] [proxy_ajp:error] [pid 99999] [client <host>:<port>] AH00992: ajp_read_header: ajp_ilink_receive failed
  [Sun Jan 01 00:00:00.000000 1900] [proxy_ajp:error] [pid 99999] (70007)The timeout specified has expired: [client <host>:<port>] AH00878: read response failed from <server-host>:<server-port> ()
  

• We use httpd and mod_cluster and see requests fail at times with 504s

• The proxy requests are failing with the below error in Apache httpd error_log. When this message is logged, 504 Gateway Timeout will be returned to the client.
• We have issue happening in the production environment for requests which take a longer processing time on the EAP server. The application makes calls to the other back-end systems and when these requests take a little longer to complete the EWS returns a Gateway timeout error.
• The client request gets a Gateway Timeout error (HTTP 504) from JBoss EWS when accessed via the load balancer if the request takes a longer than usual, How to increase the timeout in EWS?
• How can we increase this timeout?