Confluence displays java.net.URISyntaxException: Expected authority at index 2: // error

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Summary

When logging into Confluence, the following stacktrace and message display:

2020-11-23 22:28:46,842 ERROR [http-nio-8090-exec-11] [[Standalone].[localhost].[/].[action]] log Servlet.service() for servlet [action] in context with path [] threw exception
java.lang.IllegalArgumentException: java.net.URISyntaxException: Expected authority at index 2: //
	at com.github.kristofa.brave.servlet.ServletHttpServerRequest.getUri(ServletHttpServerRequest.java:27)
	at com.atlassian.confluence.web.filter.ZipkinTracingFilter$1.lambda$create$0(ZipkinTracingFilter.java:38)
	at com.github.kristofa.brave.http.HttpServerRequestAdapter.getSpanName(HttpServerRequestAdapter.java:41)
	at com.github.kristofa.brave.ServerRequestInterceptor.handle(ServerRequestInterceptor.java:47)
	at com.github.kristofa.brave.servlet.BraveServletFilter.doFilter(BraveServletFilter.java:56)
	at com.atlassian.confluence.web.filter.ZipkinTracingFilter.doFilter(ZipkinTracingFilter.java:52)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
...
Caused by: java.net.URISyntaxException: Expected authority at index 2: //
	at java.base/java.net.URI$Parser.fail(Unknown Source)
	at java.base/java.net.URI$Parser.failExpecting(Unknown Source)
	at java.base/java.net.URI$Parser.parseHierarchical(Unknown Source)
	at java.base/java.net.URI$Parser.parse(Unknown Source)
	at java.base/java.net.URI.<init>(Unknown Source)
	at com.github.kristofa.brave.servlet.ServletHttpServerRequest.getUri(ServletHttpServerRequest.java:25)


Environment

Confluence 7.9.x

NGINX proxy

Diagnosis


As displayed in the UI, the Confluence application log contains the stacktrace shown above.

Cause


The NGINX proxy has a configuration that contains an extra forward slash - here, after the $host variable:

proxy_redirect http://mycompany.com:8090 $scheme://$host/;


Solution

  1. Stop NGINX.
  2. Remove the forward slash trailing the $host variable.
  3. Start NGINX.


Last modified on Dec 9, 2020

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