13 Replies Latest reply on May 31, 2016 3:50 AM by nickarls

WELD-001409: Ambiguous dependencies for type HttpSession with qualifiers @Default

educlj Mar 15, 2016 2:37 PM

Dear community,

I have a war that is running smooth on JBoss 6.1. It happens that I need to bring it to Wildfly 10 and, after going through a lot of minor adjustments, I got stuck on the problem you can see below.

Does anyone have a tip or advice about what I shall do to finish my ambiguity problem?

Any help is quite welcome.

Thanks in advance!

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13:51:22,922 ERROR [org.jboss.msc.service.fail] (MSC service thread 1-1) MSC000001: Failed to start service jboss.deployment.unit."int.war".WeldStartService: org.jboss.msc.service.StartException in service jboss.deployment.unit."int.war".WeldStartService: Failed to start service

at org.jboss.msc.service.ServiceControllerImpl$StartTask.run(ServiceControllerImpl.java:1904)

at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)

at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)

at java.lang.Thread.run(Thread.java:745)

Caused by: org.jboss.weld.exceptions.DeploymentException: WELD-001409: Ambiguous dependencies for type HttpSession with qualifiers @Default

at injection point [BackedAnnotatedField] @Inject org.jboss.seam.security.IdentityImpl.session

at org.jboss.seam.security.IdentityImpl.session(IdentityImpl.java:0)

Possible dependencies:

- WELD%AbstractBuiltInBean%int.war/WEB-INF/lib/seam-security-3.1.0.Final.jar%HttpSession,

- Producer Method [HttpSession] with qualifiers [@Any @Default] declared as [[BackedAnnotatedMethod] @Produces @RequestScoped protected org.jboss.solder.servlet.http.ImplicitHttpServletObjectsProducer.getHttpSession()]

at org.jboss.weld.bootstrap.Validator.validateInjectionPointForDeploymentProblems(Validator.java:367)

at org.jboss.weld.bootstrap.Validator.validateInjectionPoint(Validator.java:281)

at org.jboss.weld.bootstrap.Validator.validateGeneralBean(Validator.java:134)

at org.jboss.weld.bootstrap.Validator.validateRIBean(Validator.java:155)

at org.jboss.weld.bootstrap.Validator.validateBean(Validator.java:518)

at org.jboss.weld.bootstrap.ConcurrentValidator$1.doWork(ConcurrentValidator.java:68)

at org.jboss.weld.bootstrap.ConcurrentValidator$1.doWork(ConcurrentValidator.java:66)

at org.jboss.weld.executor.IterativeWorkerTaskFactory$1.call(IterativeWorkerTaskFactory.java:63)

at org.jboss.weld.executor.IterativeWorkerTaskFactory$1.call(IterativeWorkerTaskFactory.java:56)

at java.util.concurrent.FutureTask.run(FutureTask.java:266)

at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)

at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)

at java.lang.Thread.run(Thread.java:745)

at org.jboss.threads.JBossThread.run(JBossThread.java:320)

1. Re: WELD-001409: Ambiguous dependencies for type HttpSession with qualifiers @Default

mkouba Mar 16, 2016 8:32 AM (in response to educlj)

Hi Eduardo,
in CDI 1.2 (WildFly 10) a built-in bean with type javax.servlet.http.HttpSession is available out of the box. And Solder project also provides a bean with this type. I can see you're using Seam 3 - this project is discontinued and you should probably switch to successor/absorbent projects - see also http://seamframework.org/ for more info. E.g. for Seam Security it's PicketLink (see for example http://picketlink.org/gettingstarted/first_cdi_app/).
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2. Re: WELD-001409: Ambiguous dependencies for type HttpSession with qualifiers @Default

manovotn Mar 16, 2016 8:36 AM (in response to educlj)

Hi Eduardo

Looking at the exception, I would try to remove the seam-security-3.1.0.Final.jar
The other producer method looks like a valid match you are looking for.
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3. Re: WELD-001409: Ambiguous dependencies for type HttpSession with qualifiers @Default

educlj Mar 17, 2016 10:04 AM (in response to educlj)

Thank you for your replies, Martin and Matej. I'm gonna try your suggestions later and, as soon as I get any news about the result, I'll post it here.

Best regards!
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4. Re: WELD-001409: Ambiguous dependencies for type HttpSession with qualifiers @Default

nickarls May 30, 2016 4:31 AM (in response to educlj)

I'm also facing a scenario where we are migrating an application running on 7.1.1 to WF 10. There is rewriting going on but I'd prefer to have the old application running while Seam3 + solder is being removed.
Of course, I could recompile solder with the producer method taken out but are there any other approches? Writing an extension that vetoes the solder producer method (does the API even allow it)?

Thanks in advance,
Nik
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5. Re: WELD-001409: Ambiguous dependencies for type HttpSession with qualifiers @Default

mkouba May 30, 2016 4:40 AM (in response to nickarls)

Hi Nicklas,
I think it should be quite straightforward, just observe ProcessAnnotatedType<ImplicitHttpServletObjectsProducer> and call veto().
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6. Re: WELD-001409: Ambiguous dependencies for type HttpSession with qualifiers @Default

nickarls May 30, 2016 4:45 AM (in response to mkouba)

Thanks for the verification, I was just about to go down that route after grepping "veto" in the spec ;-)
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7. Re: WELD-001409: Ambiguous dependencies for type HttpSession with qualifiers @Default

nickarls May 30, 2016 4:49 AM (in response to mkouba)

BTW, how would you recommend handling the backwards compatibility since the veto shouldn't be done for the 7.1.1 deployments? Silently check for the presence of some CDI 1.1 class?
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8. Re: WELD-001409: Ambiguous dependencies for type HttpSession with qualifiers @Default

mkouba May 30, 2016 4:59 AM (in response to nickarls)

Yes, for instance checking the presence of javax.enterprise.inject.spi.CDI should do the trick. You could also chech Bean.class.getInterfaces().length, for CDI 1.1+ it should return 2. It's not very nice but AFAIK there is no elegant solution.
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9. Re: WELD-001409: Ambiguous dependencies for type HttpSession with qualifiers @Default

nickarls May 30, 2016 8:21 AM (in response to mkouba)

Soooo, it turns out that there is code that uses other artifacts in the ImplicitHttpServletObjectsProducer such as the HTTP response, so vetoing the entire bean resulted in missing injections.

I tried @Observes ProcessProducerMethod<HttpServletRequest, ImplicitHttpServletObjectsProducer> event) but found no way of vetoing just one producer method and the annotations were immutable so I couldn't even add dummy qualifier literals to make the duplicate go away. Tips for that? ;-)
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10. Re: WELD-001409: Ambiguous dependencies for type HttpSession with qualifiers @Default

mkouba May 30, 2016 8:39 AM (in response to nickarls)

I see. Well, one way would be not to veto the ImplicitHttpServletObjectsProducer completely but instead wrap the AnnotatedType and add some dummy qualifier (e.g. something like @Solder) on the relevant producer methods. You could also use ProcessBeanAttributes.veto() to only veto relevant producer methods but then the extension code will not be CDI 1.0 compatible.
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11. Re: WELD-001409: Ambiguous dependencies for type HttpSession with qualifiers @Default

nickarls May 30, 2016 9:03 AM (in response to mkouba)

Do you know any examples for "wrap the AnnotatedType and add some dummy qualifier (e.g. something like @Solder) on the relevant producer methods."? By definition, it would have to be CDI 1.0 compatible in my case...
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12. Re: WELD-001409: Ambiguous dependencies for type HttpSession with qualifiers @Default

mkouba May 30, 2016 9:15 AM (in response to nickarls)

If stuck with solder then AnnotatedTypeBuilder could help: Chapter 9. Annotation and AnnotatedType Utilities
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13. Re: WELD-001409: Ambiguous dependencies for type HttpSession with qualifiers @Default

nickarls May 31, 2016 3:50 AM (in response to mkouba)

Thanks, that did the trick
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