Unable to establish connection from domain --> Dispatcher --> Render ..502 Bad Gateway

[#1]

Hi Team,

We are using Apache version 2.4 with dispatcher 4.3.3 version. Configured dispatcher.any, httpd.conf,http_Vhost.conf, when we are accessing from dispatcher I am able to get response from renderer. But when we are accessing from domain i am getting 502 bad gateway. In dispatcher.log response status coming as 400. Please help me on the same. 

When accessing from dispatcher find logs

Wed Feb 26 09:40:16 2020] [D] [pid 26772] Render-ID in cookie detected: rend01

[Wed Feb 26 09:40:16 2020] [D] [pid 26772] Found farm author for rnse2-usst-lweb01.rno.com:21100

[Wed Feb 26 09:40:16 2020] [D] [pid 26772] checking [/bin/healthchecktype=external]

[Wed Feb 26 09:40:16 2020] [D] [pid 26772] request URL has no extension: /bin/healthchecktype=external

[Wed Feb 26 09:40:16 2020] [D] [pid 26772] cache-action for [/bin/healthchecktype=external]: NONE

[Wed Feb 26 09:40:16 2020] [D] [pid 26772] Creating new connection: rns2-usst-lapp03.rno.com:8443

[Wed Feb 26 09:40:16 2020] [D] [pid 26772] Connected to backend rend01 (rns2-usst-lapp03.rno.com:8443)

[Wed Feb 26 09:40:16 2020] [D] [pid 26772] Adding request header: Host

[Wed Feb 26 09:40:16 2020] [D] [pid 26772] Adding request header: Cache-Control

[Wed Feb 26 09:40:16 2020] [D] [pid 26772] Adding request header: Upgrade-Insecure-Requests

[Wed Feb 26 09:40:16 2020] [D] [pid 26772] Adding request header: User-Agent

[Wed Feb 26 09:40:16 2020] [D] [pid 26772] Adding request header: Sec-Fetch-Mode

[Wed Feb 26 09:40:16 2020] [D] [pid 26772] Adding request header: Sec-Fetch-User

[Wed Feb 26 09:40:16 2020] [D] [pid 26772] Adding request header: Accept

[Wed Feb 26 09:40:16 2020] [D] [pid 26772] Adding request header: Sec-Fetch-Site

[Wed Feb 26 09:40:16 2020] [D] [pid 26772] Adding request header: Accept-Encoding

[Wed Feb 26 09:40:16 2020] [D] [pid 26772] Adding request header: Accept-Language

[Wed Feb 26 09:40:16 2020] [D] [pid 26772] Adding request header: Cookie

[Wed Feb 26 09:40:16 2020] [D] [pid 26772] Adding request header: Via

[Wed Feb 26 09:40:16 2020] [D] [pid 26772] Adding request header: X-Forwarded-For

[Wed Feb 26 09:40:16 2020] [D] [pid 26772] Adding request header: X-Forwarded-SSL

[Wed Feb 26 09:40:16 2020] [D] [pid 26772] Adding request header: X-Forwarded-SSL-Cipher

[Wed Feb 26 09:40:16 2020] [D] [pid 26772] Adding request header: X-Forwarded-SSL-Session-ID

[Wed Feb 26 09:40:16 2020] [D] [pid 26772] Adding request header: X-Forwarded-Port

[Wed Feb 26 09:40:16 2020] [D] [pid 26772] Adding request header: Server-Agent

[Wed Feb 26 09:40:16 2020] [D] [pid 26772] response.status = 200

[Wed Feb 26 09:40:16 2020] [D] [pid 26772] response.headers[Date] = "Wed, 26 Feb 2020 09:40:16 GMT"

[Wed Feb 26 09:40:16 2020] [D] [pid 26772] response.headers[X-Content-Type-Options] = "nosniff"

[Wed Feb 26 09:40:16 2020] [D] [pid 26772] response.headers[X-Frame-Options] = "SAMEORIGIN"

[Wed Feb 26 09:40:16 2020] [D] [pid 26772] response.headers[X-Powered-By] = "Jetty(9.4.15.v20190215)"

[Wed Feb 26 09:40:16 2020] [D] [pid 26772] Storing socket for later reuse: rns2-usst-lapp03.rno.com:8443

[Wed Feb 26 09:40:16 2020] [I] [pid 26772] "GET /bin/healthchecktype=external" 200 none [author/rend01] 48ms

when we are accessing from domain it is capturing following logs

[Wed Feb 26 09:40:16 2020] [D] [pid 2797] Found farm author for accp-sh-uat.rno.com

[Wed Feb 26 09:40:16 2020] [D] [pid 2797] checking [/bin/healthchecktype=external]

[Wed Feb 26 09:40:16 2020] [D] [pid 2797] request URL has no extension: /bin/healthchecktype=external

[Wed Feb 26 09:40:16 2020] [D] [pid 2797] cache-action for [/bin/healthchecktype=external]: NONE

[Wed Feb 26 09:40:16 2020] [D] [pid 2797] Reusing connection: rns2-usst-lapp03.rno.com:8443

[Wed Feb 26 09:40:16 2020] [D] [pid 2797] Connected to backend rend01 (rns2-usst-lapp03.rno.com:8443)

[Wed Feb 26 09:40:16 2020] [D] [pid 2797] Adding request header: Host

[Wed Feb 26 09:40:16 2020] [D] [pid 2797] Adding request header: x-shield-req-id

[Wed Feb 26 09:40:16 2020] [D] [pid 2797] Adding request header: User-Agent

[Wed Feb 26 09:40:16 2020] [D] [pid 2797] Adding request header: Via

[Wed Feb 26 09:40:16 2020] [D] [pid 2797] Adding request header: X-Forwarded-For

[Wed Feb 26 09:40:16 2020] [D] [pid 2797] Adding request header: X-Forwarded-SSL

[Wed Feb 26 09:40:16 2020] [D] [pid 2797] Adding request header: X-Forwarded-SSL-Cipher

[Wed Feb 26 09:40:16 2020] [D] [pid 2797] Adding request header: Server-Agent

[Wed Feb 26 09:40:16 2020] [D] [pid 2797] response.status = 400

[Wed Feb 26 09:40:16 2020] [D] [pid 2797] Setting sticky connection to rend01

[Wed Feb 26 09:40:16 2020] [D] [pid 2797] response.headers[Set-Cookie] = "renderid=rend01; path=/; secure"

[Wed Feb 26 09:40:16 2020] [D] [pid 2797] response.headers[Cache-Control] = "must-revalidate,no-cache,no-store"

[Wed Feb 26 09:40:16 2020] [D] [pid 2797] response.headers[Content-Type] = "text/html;charset=iso-8859-1"

[Wed Feb 26 09:40:16 2020] [D] [pid 2797] response.headers[Content-Length] = "2078"

[Wed Feb 26 09:40:16 2020] [D] [pid 2797] response.headers[X-Powered-By] = "Jetty(9.4.15.v20190215)"

[Wed Feb 26 09:40:16 2020] [D] [pid 2797] No socket reuse: backend asks to close connection

[Wed Feb 26 09:40:16 2020] [I] [pid 2797] "GET /bin/healthchecktype=external" 400 none [author/rend01] 2ms

[#2 · Accepted solution]

The error is created on AEM side, so you check the logs there.

* The request.log on that publish instance should log this request with the response code 400 as well.

* Check the error.log if there is any trace for that request.

What code is behind this /bin/healthchecktype=external request? I am quite sure that it is not AEM ootb functionality.

[#3]

Hi All,

It's been resolved. SSL certification issue.

Regards,

Guru Pavan

[gurup34365977]

Please check the following document where the steps to use dispatcher with multiple domains is explained:

https://docs.adobe.com/content/help/en/experience-manager-dispatcher/using/configuring/dispatcher-do...

[gurup34365977]

Hi Hamid, Thank you for your quick response. I have followed the same documentation. But no luck. Please suggest me any other options.

Note that I am able to establish request from dispatcher to renderer but unable to establish from domain via dispatcher to appserver.

[gurup34365977]

please suggest/recommend me what might be causing this issue.