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  1. Solder
  2. SOLDER-248

Seam Servlet broken in multi-war ear deployment

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Details

    • Bug
    • Status: Open
    • Major
    • Resolution: Unresolved
    • 3.0.0.Final
    • Future
    • None
    • None
    • Documentation (Ref Guide, User Guide, etc.), Release Notes
    • Workaround Exists
    • Hide

      There is a partial workaround:

      Deploy Seam Servlet within ${ear.home}/lib and copy the content of Seam Servlet web-fragment.xml to the web application't web.xml. With these changes in place, Seam Servlet will work with the following limitations:

      • Servlet event observers (e.g. @Observes @Initialized ServletContext) will be invoked for every web application
      • injection of @ApplicationScoped Servlet objects does not work (i.e. ServletContext of the web application that was registered last is injected to every web application)
      Show
      There is a partial workaround: Deploy Seam Servlet within ${ear.home}/lib and copy the content of Seam Servlet web-fragment.xml to the web application't web.xml. With these changes in place, Seam Servlet will work with the following limitations: Servlet event observers (e.g. @Observes @Initialized ServletContext) will be invoked for every web application injection of @ApplicationScoped Servlet objects does not work (i.e. ServletContext of the web application that was registered last is injected to every web application)

    Description

      The Servlet specification requires a java library to be bundled within the WEB-INF/lib folder for its web-fragment.xml to be read. Therefore, if multiple web applications using Seam Servlet are bundled within an EAR, they all have to package Seam Servlet within their WEB-INF/lib folders.

      The CDI specification is not clear in defining the application scope in an EAR (See https://issues.jboss.org/browse/CDI-129 for details.)

      JBoss AS 7 implements the application scope as per-ear.

      This results in conflicts between multiple instances of Seam Servlet. Therefore, when the ear is deployed, the deployment fails with AmbiguousResolutionException like the following one:

      15:14:42,467 ERROR [org.jboss.msc.service.fail] (MSC service thread 1-7) MSC00001: Failed to start service jboss.deployment.unit."test.ear".WeldService: org.jboss.msc.service.StartException in service jboss.deployment.unit."test.ear".WeldService: org.jboss.weld.exceptions.DeploymentException: WELD-001409 Ambiguous dependencies for type [HttpServletRequest] with qualifiers [@Default] at injection point [[field] @Inject private org.jboss.seam.servlet.http.CookieParamProducer.request]. Possible dependencies [[Producer Method [HttpServletRequest] with qualifiers [@Any @Default] declared as [[method] @Produces @Typed @RequestScoped protected org.jboss.seam.servlet.http.ImplicitHttpServletObjectsProducer.getHttpServletRequest()], Producer Method [HttpServletRequest] with qualifiers [@Any @Default] declared as [[method] @Produces @Typed @RequestScoped protected org.jboss.seam.servlet.http.ImplicitHttpServletObjectsProducer.getHttpServletRequest()]]]
      at org.jboss.as.weld.services.WeldService.start(WeldService.java:96)
      at org.jboss.msc.service.ServiceControllerImpl$StartTask.run(ServiceControllerImpl.java:1765)
      at org.jboss.msc.service.ServiceControllerImpl$ClearTCCLTask.run(ServiceControllerImpl.java:2291)
      at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886) [:1.6.0_24]
      at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908) [:1.6.0_24]
      at java.lang.Thread.run(Thread.java:662) [:1.6.0_24]
      Caused by: org.jboss.weld.exceptions.DeploymentException: WELD-001409 Ambiguous dependencies for type [HttpServletRequest] with qualifiers [@Default] at injection point [[field] @Inject private org.jboss.seam.servlet.http.CookieParamProducer.request]. Possible dependencies [[Producer Method [HttpServletRequest] with qualifiers [@Any @Default] declared as [[method] @Produces @Typed @RequestScoped protected org.jboss.seam.servlet.http.ImplicitHttpServletObjectsProducer.getHttpServletRequest()], Producer Method [HttpServletRequest] with qualifiers [@Any @Default] declared as [[method] @Produces @Typed @RequestScoped protected org.jboss.seam.servlet.http.ImplicitHttpServletObjectsProducer.getHttpServletRequest()]]]
      at org.jboss.weld.bootstrap.Validator.validateInjectionPoint(Validator.java:274)
      at org.jboss.weld.bootstrap.Validator.validateBean(Validator.java:106)
      at org.jboss.weld.bootstrap.Validator.validateRIBean(Validator.java:129)
      at org.jboss.weld.bootstrap.Validator.validateBeans(Validator.java:351)
      at org.jboss.weld.bootstrap.Validator.validateDeployment(Validator.java:336)
      at org.jboss.weld.bootstrap.WeldBootstrap.validateBeans(WeldBootstrap.java:404)
      at org.jboss.as.weld.WeldContainer.start(WeldContainer.java:82)
      at org.jboss.as.weld.services.WeldService.start(WeldService.java:89)
      ... 5 more

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              Unassigned Unassigned
              rhn-engineering-jharting Jozef Hartinger
              Archiver:
              samahaja@redhat.com Sagar Mahajan

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                Created:
                Updated:
                Archived: