[jira] [Created] (KARAF-4912) Cannot register Servlet via http-whiteboard under Java 9

["Lijun Liao (JIRA)" <ji...@apache.org>]

Lijun Liao created KARAF-4912:
---------------------------------

             Summary: Cannot register Servlet via http-whiteboard under Java 9
                 Key: KARAF-4912
                 URL: https://issues.apache.org/jira/browse/KARAF-4912
             Project: Karaf
          Issue Type: Bug
          Components: karaf-feature
    Affects Versions: 4.1.0
         Environment: Linux (Ubuntu 12.4)
Java 9 (JDK and JRE 9 - ea+149)
            Reporter: Lijun Liao
             Fix For: 4.1.0


Under JDK / JRE 9 (tested with ea+149), it is impossibile to register the servlet via http-whiteboard.

Steps to reproduce the problem:
1. Delete the folder data
2. Start karaf
3. Copy the attached ServletTest.jar to $KARAF_HOME/deploy. The blueprint configuration tells karaf to register a servlet under the alias "/hw".
4. Open the browser and go to http://localhost:8181/hw, you will get an error.

And ERROR message as follows will be logged in the data/log/karaf.log.

{code}
2017-01-01T12:34:06,862 | ERROR | fileinstall-/.../apache-karaf-4.1.0-SNAPSHOT/deploy | WebApplication                   | 97 - org.ops4j.pax.web.pax-web-extender-whiteboard - 6.0.0 | Registration skipped for [ServletWebElement{mapping=DefaultServletMapping{httpContextId=null,urlPatterns=null,initParams={},servlet=foo.HelloWorldServlet@61a63ed6, alias=/hw, servletNamenull}}] due to error during registration
{code}



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