Caught RuntimeException "JNDIProjectStageDetector didn't implement the Extension interface"

[paul_]

Hi,

i am currently migrating an application from jsf1.2 (richfaces 3.3) to jsf2.0 (richfaces 4) (from JBoss 4.2 to JBoss 7 and Seam 2 to Seam 3)

I almost got it working now, finished replacing the jar files and resolving the dependencies. When starting the application i get a RuntimeException:

"java.lang.RuntimeException: Service class org.jboss.seam.faces.projectstage.JNDIProjectStageDetector didn't implement the Extension interface"

I set the ProjectStage in my web.xml:

	<param-name>javax.faces.PROJECT_STAGE</param-name>
	<param-value>Development</param-value>

Do I have to implement a class for this to work?

Couldn't find anything on the web or here in the community for this specific error...

Greetings from Germany,

P. Salg

[paul_]

by the way, i am using a nightly build of JBoss AS 7.1.0, downloaded on February 10th, 16:42:16 (GMT+1)

Also, Seam is in Version 3.1.0-Final and Richfaces is in Version 4.1.0-Final

Maybe this helps..

[paul_]

Well i did a little research. This is the beginning of the stacktrace:

java.lang.RuntimeException: Service class org.jboss.seam.faces.projectstage.JNDIProjectStageDetector didn't implement the Extension interface

    at org.jboss.solder.util.service.ServiceLoader.loadClass(ServiceLoader.java:217)

    at org.jboss.solder.util.service.ServiceLoader.loadService(ServiceLoader.java:197)

    at org.jboss.solder.util.service.ServiceLoader.loadServiceFile(ServiceLoader.java:169)

    at org.jboss.solder.util.service.ServiceLoader.reload(ServiceLoader.java:143)

    at org.jboss.solder.util.service.ServiceLoader.iterator(ServiceLoader.java:284)

    at org.jboss.seam.faces.projectstage.ProjectStageExtension.detectProjectStage(ProjectStageExtension.java:123)

    at org.jboss.seam.faces.projectstage.ProjectStageExtension.processAnnotatedType(ProjectStageExtension.java:65)

    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)

    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)

    at java.lang.reflect.Method.invoke(Method.java:597)

Well, let's have a look at the JNDIProjectStageDetector, it implements ProjectStageDetector.

ProjectStageDetector extends from org.jboss.solder.util.Sortable, which defines an interface only holding a comparator...

So obviously, the JNDIProjectStageDetector indeed does not implement the Extension interface.... or am I missing something?

(I just recognized, this is merely a seam-related problem and actually has nothing to do with richfaces, I will move the topic)

[lightguard]

Try 7.1.0.CR1b or 7.0.2

We haven't seen this before, if it works in those servers then it could be something that's changed in AS.

[chkal]

That's a really weird issue. The exception means that the implementation class JNDIProjectStageDetector does not implement the SPI interface ProjectStageDetector. See the loadClass() method here:

https://github.com/seam/solder/blob/develop/api/src/main/java/org/jboss/solder/util/service/ServiceLoader.java#L208

I really don't know why this is happening. Perhaps a class loading issue? But this shouldn't happen as both classes (the SPI and the implementation) are loaded from the same archive.

[paul_]

currently my guess is that I used two imported libs which are already available from the jboss module system.

(also switched back to JBoss 7.1.0 CR1b)

So i got  rid of that, but now i'm stuck somewhere else:

"Service class org.jboss.solder.resourceLoader.ClasspathResourceLoader didn't implement the Extension interface"

This slowly gets a bit frustrating..

___________________________________

got that also resolved. Now I'm stuck at

https://community.jboss.org/message/650715#650715

"WELD-001408 Unsatisfied dependencies for type FormValidationTypeOverrideExtension"

it's like chasing a ghost..

[chkal]

Nice to you you resolved this strange exception. Could you tell us what you did to fix it? I would be interested to know that!

[paul_]

can't tell you exactly how I resolved it, though my guess is a redundant dependency being used.

It helped to look at https://docs.jboss.org/author/display/AS71/Developer+Guide#DeveloperGuide-EARClassLoading again and check the 5 projects for redundancies

(The application i'm migrating consists of an EAR packaging 2 EJB Modules and 2 WARs)

I am relatively new to the whole Seam / JBoss / JSF thing so maybe I'm making mistakes which first result in such strange exceptions but become clear with a little reading in the developer guide..