If you use JBoss Tools Plugin for Eclipse to deploy apps to JBoss 5.1 container and get a “SeamListener not found”, this post provides a simple workaround.

I deployed a webapp to JBoss 5.1 container from Eclipse using JBoss Tools plugin. The app failed to start with the following error:

19:01:14,762 WARN  [JAXWSDeployerHookPreJSE] Cannot load servlet class: org.jboss.seam.servlet.SeamResourceServlet
19:01:14,787 INFO  [TomcatDeployment] deploy, ctxPath=/hcf
19:01:15,143 ERROR [[/hcf]] Error configuring application listener of class org.jboss.seam.servlet.SeamListener
java.lang.ClassNotFoundException: org.jboss.seam.servlet.SeamListener
 at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
 at java.security.AccessController.doPrivileged(Native Method)
 at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
 at java.lang.ClassLoader.loadClass(ClassLoader.java:307)
 at java.lang.ClassLoader.loadClass(ClassLoader.java:248)
 at org.jboss.web.tomcat.service.TomcatInjectionContainer.newInstance(TomcatInjectionContainer.java:262)
 at org.jboss.web.tomcat.service.TomcatInjectionContainer.newInstance(TomcatInjectionContainer.java:256)
 at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:3859)
 at org.apache.catalina.core.StandardContext.start(StandardContext.java:4393)
 at org.jboss.web.tomcat.service.deployers.TomcatDeployment.performDeployInternal(TomcatDeployment.java:310)
 at org.jboss.web.tomcat.service.deployers.TomcatDeployment.performDeploy(TomcatDeployment.java:142)
 at org.jboss.web.deployers.AbstractWarDeployment.start(AbstractWarDeployment.java:461)
 at org.jboss.web.deployers.WebModule.startModule(WebModule.java:118)
 at org.jboss.web.deployers.WebModule.start(WebModule.java:97)
 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)
 at org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:157)
 at org.jboss.mx.server.Invocation.dispatch(Invocation.java:96)
 at org.jboss.mx.server.Invocation.invoke(Invocation.java:88)
 at org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:264)
 at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:668)
 at org.jboss.system.microcontainer.ServiceProxy.invoke(ServiceProxy.java:206)
 at $Proxy38.start(Unknown Source)
 at org.jboss.system.microcontainer.StartStopLifecycleAction.installAction(StartStopLifecycleAction.java:42)
 at org.jboss.system.microcontainer.StartStopLifecycleAction.installAction(StartStopLifecycleAction.java:37)
 at org.jboss.dependency.plugins.action.SimpleControllerContextAction.simpleInstallAction(SimpleControllerContextAction.java:62)
 at org.jboss.dependency.plugins.action.AccessControllerContextAction.install(AccessControllerContextAction.java:71)
 at org.jboss.dependency.plugins.AbstractControllerContextActions.install(AbstractControllerContextActions.java:51)
 at org.jboss.dependency.plugins.AbstractControllerContext.install(AbstractControllerContext.java:348)
 at org.jboss.system.microcontainer.ServiceControllerContext.install(ServiceControllerContext.java:286)
 at org.jboss.dependency.plugins.AbstractController.install(AbstractController.java:1631)
 at org.jboss.dependency.plugins.AbstractController.incrementState(AbstractController.java:934)
 at org.jboss.dependency.plugins.AbstractController.resolveContexts(AbstractController.java:1082)
 at org.jboss.dependency.plugins.AbstractController.resolveContexts(AbstractController.java:984)
 at org.jboss.dependency.plugins.AbstractController.change(AbstractController.java:822)
 at org.jboss.dependency.plugins.AbstractController.change(AbstractController.java:553)
 at org.jboss.system.ServiceController.doChange(ServiceController.java:688)
 at org.jboss.system.ServiceController.start(ServiceController.java:460)
 at org.jboss.system.deployers.ServiceDeployer.start(ServiceDeployer.java:163)
 at org.jboss.system.deployers.ServiceDeployer.deploy(ServiceDeployer.java:99)
 at org.jboss.system.deployers.ServiceDeployer.deploy(ServiceDeployer.java:46)
 at org.jboss.deployers.spi.deployer.helpers.AbstractSimpleRealDeployer.internalDeploy(AbstractSimpleRealDeployer.java:62)
 at org.jboss.deployers.spi.deployer.helpers.AbstractRealDeployer.deploy(AbstractRealDeployer.java:50)
 at org.jboss.deployers.plugins.deployers.DeployerWrapper.deploy(DeployerWrapper.java:171)
 at org.jboss.deployers.plugins.deployers.DeployersImpl.doDeploy(DeployersImpl.java:1439)
 at org.jboss.deployers.plugins.deployers.DeployersImpl.doInstallParentFirst(DeployersImpl.java:1157)
 at org.jboss.deployers.plugins.deployers.DeployersImpl.doInstallParentFirst(DeployersImpl.java:1178)
 at org.jboss.deployers.plugins.deployers.DeployersImpl.install(DeployersImpl.java:1098)
 at org.jboss.dependency.plugins.AbstractControllerContext.install(AbstractControllerContext.java:348)
 at org.jboss.dependency.plugins.AbstractController.install(AbstractController.java:1631)
 at org.jboss.dependency.plugins.AbstractController.incrementState(AbstractController.java:934)
 at org.jboss.dependency.plugins.AbstractController.resolveContexts(AbstractController.java:1082)
 at org.jboss.dependency.plugins.AbstractController.resolveContexts(AbstractController.java:984)
 at org.jboss.dependency.plugins.AbstractController.change(AbstractController.java:822)
 at org.jboss.dependency.plugins.AbstractController.change(AbstractController.java:553)
 at org.jboss.deployers.plugins.deployers.DeployersImpl.process(DeployersImpl.java:781)
 at org.jboss.deployers.plugins.main.MainDeployerImpl.process(MainDeployerImpl.java:702)
 at org.jboss.system.server.profileservice.repository.MainDeployerAdapter.process(MainDeployerAdapter.java:117)
 at org.jboss.system.server.profileservice.hotdeploy.HDScanner.scan(HDScanner.java:362)
 at org.jboss.system.server.profileservice.hotdeploy.HDScanner.run(HDScanner.java:255)
 at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:441)
 at java.util.concurrent.FutureTask$Sync.innerRunAndReset(FutureTask.java:317)
 at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:150)
 at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$101(ScheduledThreadPoolExecutor.java:98)
 at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.runPeriodic(ScheduledThreadPoolExecutor.java:181)
 at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:205)
 at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
 at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
 at java.lang.Thread.run(Thread.java:619)
19:01:15,196 ERROR [[/hcf]] Skipped installing application listeners due to previous error(s)
19:01:15,196 ERROR [StandardContext] Error listenerStart
19:01:15,196 ERROR [StandardContext] Context [/hcf] startup failed due to previous errors
19:01:15,201 ERROR [AbstractKernelController] Error installing to Start: name=jboss.web.deployment:war=/hcf state=Create mode=Manual requiredState=Installed
org.jboss.deployers.spi.DeploymentException: URL file:/C:/software/jboss-5.1.0.GA/server/default/tmp/5c4o12w-udpgi-gf7dk40e-1-gf7dli4l-9o/hcf.war/ deployment failed
 at org.jboss.web.tomcat.service.deployers.TomcatDeployment.performDeployInternal(TomcatDeployment.java:331)
 at org.jboss.web.tomcat.service.deployers.TomcatDeployment.performDeploy(TomcatDeployment.java:142)
 at org.jboss.web.deployers.AbstractWarDeployment.start(AbstractWarDeployment.java:461)
 at org.jboss.web.deployers.WebModule.startModule(WebModule.java:118)
 at org.jboss.web.deployers.WebModule.start(WebModule.java:97)
 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)
 at org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:157)
 at org.jboss.mx.server.Invocation.dispatch(Invocation.java:96)
 at org.jboss.mx.server.Invocation.invoke(Invocation.java:88)
 at org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:264)
 at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:668)
 at org.jboss.system.microcontainer.ServiceProxy.invoke(ServiceProxy.java:206)
 at $Proxy38.start(Unknown Source)
 at org.jboss.system.microcontainer.StartStopLifecycleAction.installAction(StartStopLifecycleAction.java:42)
 at org.jboss.system.microcontainer.StartStopLifecycleAction.installAction(StartStopLifecycleAction.java:37)
 at org.jboss.dependency.plugins.action.SimpleControllerContextAction.simpleInstallAction(SimpleControllerContextAction.java:62)
 at org.jboss.dependency.plugins.action.AccessControllerContextAction.install(AccessControllerContextAction.java:71)
 at org.jboss.dependency.plugins.AbstractControllerContextActions.install(AbstractControllerContextActions.java:51)
 at org.jboss.dependency.plugins.AbstractControllerContext.install(AbstractControllerContext.java:348)
 at org.jboss.system.microcontainer.ServiceControllerContext.install(ServiceControllerContext.java:286)
 at org.jboss.dependency.plugins.AbstractController.install(AbstractController.java:1631)
 at org.jboss.dependency.plugins.AbstractController.incrementState(AbstractController.java:934)
 at org.jboss.dependency.plugins.AbstractController.resolveContexts(AbstractController.java:1082)
 at org.jboss.dependency.plugins.AbstractController.resolveContexts(AbstractController.java:984)
 at org.jboss.dependency.plugins.AbstractController.change(AbstractController.java:822)
 at org.jboss.dependency.plugins.AbstractController.change(AbstractController.java:553)
 at org.jboss.system.ServiceController.doChange(ServiceController.java:688)
 at org.jboss.system.ServiceController.start(ServiceController.java:460)
 at org.jboss.system.deployers.ServiceDeployer.start(ServiceDeployer.java:163)
 at org.jboss.system.deployers.ServiceDeployer.deploy(ServiceDeployer.java:99)
 at org.jboss.system.deployers.ServiceDeployer.deploy(ServiceDeployer.java:46)
 at org.jboss.deployers.spi.deployer.helpers.AbstractSimpleRealDeployer.internalDeploy(AbstractSimpleRealDeployer.java:62)
 at org.jboss.deployers.spi.deployer.helpers.AbstractRealDeployer.deploy(AbstractRealDeployer.java:50)
 at org.jboss.deployers.plugins.deployers.DeployerWrapper.deploy(DeployerWrapper.java:171)
 at org.jboss.deployers.plugins.deployers.DeployersImpl.doDeploy(DeployersImpl.java:1439)
 at org.jboss.deployers.plugins.deployers.DeployersImpl.doInstallParentFirst(DeployersImpl.java:1157)
 at org.jboss.deployers.plugins.deployers.DeployersImpl.doInstallParentFirst(DeployersImpl.java:1178)
 at org.jboss.deployers.plugins.deployers.DeployersImpl.install(DeployersImpl.java:1098)
 at org.jboss.dependency.plugins.AbstractControllerContext.install(AbstractControllerContext.java:348)
 at org.jboss.dependency.plugins.AbstractController.install(AbstractController.java:1631)
 at org.jboss.dependency.plugins.AbstractController.incrementState(AbstractController.java:934)
 at org.jboss.dependency.plugins.AbstractController.resolveContexts(AbstractController.java:1082)
 at org.jboss.dependency.plugins.AbstractController.resolveContexts(AbstractController.java:984)
 at org.jboss.dependency.plugins.AbstractController.change(AbstractController.java:822)
 at org.jboss.dependency.plugins.AbstractController.change(AbstractController.java:553)
 at org.jboss.deployers.plugins.deployers.DeployersImpl.process(DeployersImpl.java:781)
 at org.jboss.deployers.plugins.main.MainDeployerImpl.process(MainDeployerImpl.java:702)
 at org.jboss.system.server.profileservice.repository.MainDeployerAdapter.process(MainDeployerAdapter.java:117)
 at org.jboss.system.server.profileservice.hotdeploy.HDScanner.scan(HDScanner.java:362)
 at org.jboss.system.server.profileservice.hotdeploy.HDScanner.run(HDScanner.java:255)
 at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:441)
 at java.util.concurrent.FutureTask$Sync.innerRunAndReset(FutureTask.java:317)
 at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:150)
 at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$101(ScheduledThreadPoolExecutor.java:98)
 at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.runPeriodic(ScheduledThreadPoolExecutor.java:181)
 at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:205)
 at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
 at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
 at java.lang.Thread.run(Thread.java:619)
19:01:15,209 ERROR [AbstractKernelController] Error installing to Real: name=vfsfile:/C:/workspace/.metadata/.plugins/org.jboss.ide.eclipse.as.core/JBoss_5.1_Runtime_Server1286220891669/deploy/hcf.war/ state=PreReal mode=Manual requiredState=Real
org.jboss.deployers.spi.DeploymentException: URL file:/C:/software/jboss-5.1.0.GA/server/default/tmp/5c4o12w-udpgi-gf7dk40e-1-gf7dli4l-9o/hcf.war/ deployment failed
 at org.jboss.web.tomcat.service.deployers.TomcatDeployment.performDeployInternal(TomcatDeployment.java:331)
 at org.jboss.web.tomcat.service.deployers.TomcatDeployment.performDeploy(TomcatDeployment.java:142)
 at org.jboss.web.deployers.AbstractWarDeployment.start(AbstractWarDeployment.java:461)
 at org.jboss.web.deployers.WebModule.startModule(WebModule.java:118)
 at org.jboss.web.deployers.WebModule.start(WebModule.java:97)
 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)
 at org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:157)
 at org.jboss.mx.server.Invocation.dispatch(Invocation.java:96)
 at org.jboss.mx.server.Invocation.invoke(Invocation.java:88)
 at org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:264)
 at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:668)
 at org.jboss.system.microcontainer.ServiceProxy.invoke(ServiceProxy.java:206)
 at $Proxy38.start(Unknown Source)
 at org.jboss.system.microcontainer.StartStopLifecycleAction.installAction(StartStopLifecycleAction.java:42)
 at org.jboss.system.microcontainer.StartStopLifecycleAction.installAction(StartStopLifecycleAction.java:37)
 at org.jboss.dependency.plugins.action.SimpleControllerContextAction.simpleInstallAction(SimpleControllerContextAction.java:62)
 at org.jboss.dependency.plugins.action.AccessControllerContextAction.install(AccessControllerContextAction.java:71)
 at org.jboss.dependency.plugins.AbstractControllerContextActions.install(AbstractControllerContextActions.java:51)
 at org.jboss.dependency.plugins.AbstractControllerContext.install(AbstractControllerContext.java:348)
 at org.jboss.system.microcontainer.ServiceControllerContext.install(ServiceControllerContext.java:286)
 at org.jboss.dependency.plugins.AbstractController.install(AbstractController.java:1631)
 at org.jboss.dependency.plugins.AbstractController.incrementState(AbstractController.java:934)
 at org.jboss.dependency.plugins.AbstractController.resolveContexts(AbstractController.java:1082)
 at org.jboss.dependency.plugins.AbstractController.resolveContexts(AbstractController.java:984)
 at org.jboss.dependency.plugins.AbstractController.change(AbstractController.java:822)
 at org.jboss.dependency.plugins.AbstractController.change(AbstractController.java:553)
 at org.jboss.system.ServiceController.doChange(ServiceController.java:688)
 at org.jboss.system.ServiceController.start(ServiceController.java:460)
 at org.jboss.system.deployers.ServiceDeployer.start(ServiceDeployer.java:163)
 at org.jboss.system.deployers.ServiceDeployer.deploy(ServiceDeployer.java:99)
 at org.jboss.system.deployers.ServiceDeployer.deploy(ServiceDeployer.java:46)
 at org.jboss.deployers.spi.deployer.helpers.AbstractSimpleRealDeployer.internalDeploy(AbstractSimpleRealDeployer.java:62)
 at org.jboss.deployers.spi.deployer.helpers.AbstractRealDeployer.deploy(AbstractRealDeployer.java:50)
 at org.jboss.deployers.plugins.deployers.DeployerWrapper.deploy(DeployerWrapper.java:171)
 at org.jboss.deployers.plugins.deployers.DeployersImpl.doDeploy(DeployersImpl.java:1439)
 at org.jboss.deployers.plugins.deployers.DeployersImpl.doInstallParentFirst(DeployersImpl.java:1157)
 at org.jboss.deployers.plugins.deployers.DeployersImpl.doInstallParentFirst(DeployersImpl.java:1178)
 at org.jboss.deployers.plugins.deployers.DeployersImpl.install(DeployersImpl.java:1098)
 at org.jboss.dependency.plugins.AbstractControllerContext.install(AbstractControllerContext.java:348)
 at org.jboss.dependency.plugins.AbstractController.install(AbstractController.java:1631)
 at org.jboss.dependency.plugins.AbstractController.incrementState(AbstractController.java:934)
 at org.jboss.dependency.plugins.AbstractController.resolveContexts(AbstractController.java:1082)
 at org.jboss.dependency.plugins.AbstractController.resolveContexts(AbstractController.java:984)
 at org.jboss.dependency.plugins.AbstractController.change(AbstractController.java:822)
 at org.jboss.dependency.plugins.AbstractController.change(AbstractController.java:553)
 at org.jboss.deployers.plugins.deployers.DeployersImpl.process(DeployersImpl.java:781)
 at org.jboss.deployers.plugins.main.MainDeployerImpl.process(MainDeployerImpl.java:702)
 at org.jboss.system.server.profileservice.repository.MainDeployerAdapter.process(MainDeployerAdapter.java:117)
 at org.jboss.system.server.profileservice.hotdeploy.HDScanner.scan(HDScanner.java:362)
 at org.jboss.system.server.profileservice.hotdeploy.HDScanner.run(HDScanner.java:255)
 at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:441)
 at java.util.concurrent.FutureTask$Sync.innerRunAndReset(FutureTask.java:317)
 at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:150)
 at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$101(ScheduledThreadPoolExecutor.java:98)
 at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.runPeriodic(ScheduledThreadPoolExecutor.java:181)
 at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:205)
 at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
 at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
 at java.lang.Thread.run(Thread.java:619)
19:01:15,229 WARN  [HDScanner] Failed to process changes
org.jboss.deployers.client.spi.IncompleteDeploymentException: Summary of incomplete deployments (SEE PREVIOUS ERRORS FOR DETAILS):

*** DEPLOYMENTS IN ERROR: Name -> Error

vfsfile:/C:/workspace/.metadata/.plugins/org.jboss.ide.eclipse.as.core/JBoss_5.1_Runtime_Server1286220891669/deploy/hcf.war/ -> org.jboss.deployers.spi.DeploymentException: URL file:/C:/software/jboss-5.1.0.GA/server/default/tmp/5c4o12w-udpgi-gf7dk40e-1-gf7dli4l-9o/hcf.war/ deployment failed

DEPLOYMENTS IN ERROR:
 Deployment "vfsfile:/C:/workspace/.metadata/.plugins/org.jboss.ide.eclipse.as.core/JBoss_5.1_Runtime_Server1286220891669/deploy/hcf.war/" is in error due to the following reason(s): org.jboss.deployers.spi.DeploymentException: URL file:/C:/software/jboss-5.1.0.GA/server/default/tmp/5c4o12w-udpgi-gf7dk40e-1-gf7dli4l-9o/hcf.war/ deployment failed

 at org.jboss.deployers.plugins.deployers.DeployersImpl.checkComplete(DeployersImpl.java:993)
 at org.jboss.deployers.plugins.deployers.DeployersImpl.checkComplete(DeployersImpl.java:939)
 at org.jboss.deployers.plugins.main.MainDeployerImpl.checkComplete(MainDeployerImpl.java:873)
 at org.jboss.system.server.profileservice.repository.MainDeployerAdapter.checkComplete(MainDeployerAdapter.java:128)
 at org.jboss.system.server.profileservice.hotdeploy.HDScanner.scan(HDScanner.java:369)
 at org.jboss.system.server.profileservice.hotdeploy.HDScanner.run(HDScanner.java:255)
 at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:441)
 at java.util.concurrent.FutureTask$Sync.innerRunAndReset(FutureTask.java:317)
 at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:150)
 at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$101(ScheduledThreadPoolExecutor.java:98)
 at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.runPeriodic(ScheduledThreadPoolExecutor.java:181)
 at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:205)
 at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
 at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
 at java.lang.Thread.run(Thread.java:619)

This seemed to be a bug, as the above class is contained in the jboss-seam.jar, which I included in the classpath via the following maven snippet

<dependency>
 <groupId>org.jboss.seam</groupId>
 <artifactId>jboss-seam</artifactId>
 <version>2.2.0.GA</version>
 </dependency>

I confirmed that the jar was not present in the deployed app, by going to the “Server” tab in eclipse and right-clicking on my app and “Explore”. The explore option launched a new window and listed the actual deployed app. I confirmed that the jboss-seam.jar was not present. Your deployment directory will be something like this:

C:\workspace\.metadata\.plugins\org.jboss.ide.eclipse.as.core\JBoss_5.1_Runtime_Server1286220891669\deploy\hcf.war

Upon Googling, I found that this is due to a known bug in JBoss Tools.

This issue has apparently been fixed in 3.2.0 M1.

Here “hcf” is the name of my app.

Workaround

By hit and trial, I found a simple workaround. After you deploy your webapp, simply copy the missing jar to the “lib” directory of the deployed app and restart Jboss.

Wrong location

You will find the file ‘jboss-seam-2.2.0.GA.jar’ in this directory.

C:\workspace\.metadata\.plugins\org.jboss.ide.eclipse.as.core\JBoss_5.1_Runtime_Server1286220891669\deploy\hcf.war  

Correct location

C:\workspace\.metadata\.plugins\org.jboss.ide.eclipse.as.core\JBoss_5.1_Runtime_Server1286220891669\deploy\hcf.war\WEB-INF\lib  

Move the seam jar from the wrong location to the correct location. Restart Jboss after moving the file, and the error should go away.

From http://www.vineetmanohar.com/2010/12/jboss-tools-bug-seamlistener-not-found/