[jboss-jira] [JBoss JIRA] (WFLY-4347) NullPointerException in WebServerService.getListenerMap

[Mayank Mittal (JIRA)]

Mayank Mittal created WFLY-4347:
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             Summary: NullPointerException in WebServerService.getListenerMap
                 Key: WFLY-4347
                 URL: https://issues.jboss.org/browse/WFLY-4347
             Project: WildFly
          Issue Type: Bug
          Components: Web (Undertow)
    Affects Versions: 8.1.0.Final
         Environment: Windows, Linux 
Java 8
            Reporter: Mayank Mittal
            Assignee: Stuart Douglas


While deploying a SLSB annotated with WebService causes NullPointerException in WebServerService.getListenerMap

org.jboss.msc.service.StartException in service jboss.deployment.subunit."200cms.ear"."perspectivemgtfacade.jar".INSTALL: JBAS018733: Failed to process phase INSTALL of subdeployment "perspectivemgtfacade.jar" of deployment "200cms.ear"
at org.jboss.as.server.deployment.DeploymentUnitPhaseService.start(DeploymentUnitPhaseService.java:166)
at org.jboss.msc.service.ServiceControllerImpl$StartTask.startService(ServiceControllerImpl.java:1948)
at org.jboss.msc.service.ServiceControllerImpl$StartTask.run(ServiceControllerImpl.java:1881)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
Caused by: java.lang.NullPointerException
at java.util.LinkedList$ListItr.next(Unknown Source)
at org.wildfly.extension.undertow.WebServerService.getListenerMap(WebServerService.java:73)
at org.wildfly.extension.undertow.WebServerService.getPort(WebServerService.java:49)
at org.jboss.as.webservices.config.WebServerInfoImpl.getPort(WebServerInfoImpl.java:36)
at org.jboss.ws.common.management.AbstractServerConfig.getConnectorPort(AbstractServerConfig.java:207)
at org.jboss.ws.common.management.AbstractServerConfig.getWebServicePort(AbstractServerConfig.java:170)
at org.jboss.ws.common.deployment.EndpointAddressDeploymentAspect$PortValue.getPortValue(EndpointAddressDeploymentAspect.java:198)
at org.jboss.ws.common.deployment.EndpointAddressDeploymentAspect$PortValue.getValue(EndpointAddressDeploymentAspect.java:191)
at org.jboss.ws.common.deployment.EndpointAddressDeploymentAspect.start(EndpointAddressDeploymentAspect.java:77)
at org.jboss.as.webservices.deployers.AspectDeploymentProcessor.deploy(AspectDeploymentProcessor.java:75)
at org.jboss.as.server.deployment.DeploymentUnitPhaseService.start(DeploymentUnitPhaseService.java:159)

Upon looking into the source code, I found that the the collection used to hold registered listeners in org.wildfly.extension.undertow.Server class is LinkedList. 
What I understand from the code is that this list is getting accessed by two threads at some moment of time and causes the NullPointerException
plz. refer http://stackoverflow.com/questions/18055024/nullpointer-exception-in-linkedlist-while-using-for-each-loop.
I think one should use ConcurrentHashSet to avoid such situations.



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