[NIFI-9469] Context path issue when NiFi is served behind proxy server

• Type: Bug
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 1.15.0
• Component/s: Configuration
• Labels: proxy
• Environment: CentOS 7, openjdk version "1.8.0_312"
• Assignee: Unassigned
• Reporter: Eric Porter
• Created: 09/Dec/21 18:51
• Updated: 11/Jan/22 19:34
• Resolved: 11/Jan/22 19:34

Description

After upgrading to NiFi 1.15.0 we noticed that we could no longer reach nifi on the root context path. The error we were seeing follows:

javax.ws.rs.core.UriBuilderException: The provided context path [/] was not registered as allowed [[]] 

Our nifi.web.proxy.context.path was set to:

nifi.web.proxy.context.path=/

 

To troubleshoot, we added /nifi to the nifi.web.proxy.context.path property and changed our X-ProxyContextPath proxy setting to "/nifi" and found that we could load nifi.

nifi.web.proxy.context.path=/nifi,/ 
X-ProxyContextPath "/nifi"

However, leaving X-ProxyContentPath set to "/" and setting nifi.web.proxy.context.path=/nifi,/ resulted in the same error, but helped us to discover that there seems to be an issue with parsing the single '/' character from the nifi.web.proxy.context.path setting. 

javax.ws.rs.core.UriBuilderException: The provided context path [/] was not registered as allowed [[/nifi, ]] 

After trying different escaping methods, were able to work around this issue by using the following setting:

nifi.web.proxy.context.path=//