Jira HTTP 503 after installation on new server

[Marco]

Hi there,

for quite some time now I'm trying to migrate my Jira Server instance (8.10.0) to a new server which is powered by Plesk. The old server used the same configuration but after executing the installer and setting up a subdomain, inserting the Nginx rules so that Nginx serves a proxy, I get an 503 HTTP error.

New Jira version is 8.15.0

If I login to the server via SSH and executing a wget I get a response page from Jira asking to follow the setup wizard - as expected Jira is responding at least, configuration still to follow. Calling Jira via the subdomain and HTTPS from the browser  brings up a 503. However, the Jira access log lists the browser requests.

This is why I assume the proxy config of Nginx is correct. However, I use the following NGINX setup:

location / {
 client_max_body_size 100m;
 proxy_set_header X-Forwarded-Host $host;
 proxy_set_header X-Forwarded-Server $host;
 proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
 proxy_pass http://localhost:8080/;
}

This is the same as my Confluence server instance on the same machine except the port. Confluence is working fine by the way.

To summarize ...

• Jira is running and responding, waiting for being setup (checked by wget from the machine itself)
• 503 from browser via https://<subdomain>.<domain>.<tld>
• I'm using the default connector in the server.xml for Proxy via HTTPS with the domain from above set in the Connector
• the access log lists the requests from the browser
• Server is powered by Plesk which is used to configure subdomain and SSL (which works perfectly fine for Confluence)

To be honest I'm running out of ideas since the same configuration works perfectly fine for Confluence and on the old server I am migrating from. I can't get Jira to work over the subdomain and since the Proxy config seems to be working, and wget delivers the expected result ... what am I missing?

Any ideas would be great.

Thanks in advance.