title: Spring Cloud Feign not processing @RequestMapping UriTemplate
body: <p>I have an existing Spring Cloud Feign client interface that has many mappings for my server-side API. I'm adding some new methods, and I'm suddenly running into an error. I'm trying to add a method of the form:</p>
  
  <pre><code>@RequestMapping(value = "/tasks/{id}", method = GET)
  public Resource&lt;Task&gt; getTask(@PathVariable("id")Long id);
  </code></pre>
  
  <p>Everything compiles fine, but when I try to make a call to the getTask() method above, I always get a an IllegalArgumentException complaining about the URL not being valid. Which is true, because the URL still contains the UriTemplate <code>{id}</code>.</p>
  
  <p>The full stack is:</p>
  
  <pre><code>java.lang.IllegalArgumentException: Illegal character in path at index 29: http://connect/connect/tasks/{id}
      at java.net.URI$Parser.fail(URI.java:2848)
      at java.net.URI$Parser.checkChars(URI.java:3021)
      at java.net.URI$Parser.parseHierarchical(URI.java:3105)
      at java.net.URI$Parser.parse(URI.java:3053)
      at java.net.URI.&lt;init&gt;(URI.java:588)
      at java.net.URI.create(URI.java:850)
      at feign.ribbon.RibbonClient.execute(RibbonClient.java:64)
      at feign.SynchronousMethodHandler.executeAndDecode(SynchronousMethodHandler.java:92)
      at feign.SynchronousMethodHandler.invoke(SynchronousMethodHandler.java:71)
      at feign.ReflectiveFeign$FeignInvocationHandler.invoke(ReflectiveFeign.java:94)
      at com.sun.proxy.$Proxy55.getTask(Unknown Source)
  </code></pre>
  
  <p>There are dozens of other methods in the same interface that use this exact same pattern, and everything runs fine. I cannot for the life of me figure out why Feign/Spring is suddenly having an issue with this method. I've tried every possible combination of settings and ways to write the method. If I simply remove the <code>{id}</code>, the call will go through, but obviously returns the wrong data, since its missing the id portion of the URI.</p>
  
  <p>I'm using Spring Cloud Angel.SR6 with Spring Boot 1.2.8 and Feign 8.5.0.</p>