[rules-users] Use Knowledge Agent

[java.developer.researcher]

Hello,

I am trying of integrate Drools Guvnor with an java web application. I am
using KnowledgeAgent, but occurs the next exception when execute the code:

java.lang.RuntimeException: java.io.IOException: Server returned HTTP
response code: 401 for URL:
http://localhost:8383/drools-guvnor/org.drools.guvnor.Guvnor/package/org.examples/org.examples
        at
org.drools.compiler.PackageBuilder.addKnowledgeResource(PackageBuilder.java:559)
        at
org.drools.builder.impl.KnowledgeBuilderImpl.add(KnowledgeBuilderImpl.java:25)
        at
org.examples.test.TestKnowledgeAgent.getKnowledgeBase(TestKnowledgeAgent.java:63)
        at
org.examples.test.TestKnowledgeAgent.main(TestKnowledgeAgent.java:28)
Caused by: java.io.IOException: Server returned HTTP response code: 401 for
URL:
http://localhost:8383/drools-guvnor/org.drools.guvnor.Guvnor/package/org.examples/org.examples
        at
sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown Source)
        at
org.drools.io.impl.UrlResource.getInputStream(UrlResource.java:76)
        at
org.drools.compiler.PackageBuilder.addKnowledgeResource(PackageBuilder.java:512)
        ... 3 more
Exception in thread "main" java.lang.NullPointerException
        at
org.examples.test.TestKnowledgeAgent.main(TestKnowledgeAgent.java:37)

     What is the cause of this exception? How can I solved it?

Any help is welcome.

Regards, 
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