We are getting the internal server error while hitting the application through browser.

Issue

• We are getting below exception.

JBAS014775:    New missing/unsatisfied dependencies:
      service jboss.naming.context.java.jboss.datasources.TestDS (missing) dependents: [service jboss.naming.context.java.module.MyEAR.MyWAR.env.jdbc.TestDS] 

14:56:32,181 ERROR [org.jboss.as.controller.management-operation] (Agent Heartbeat) JBAS014612: Operation ("read-attribute") failed - address: ([
    ("deployment" => "myapp"),
    ("subdeployment" => "MyWAR.war"),
    ("subsystem" => "web")
]): java.lang.NullPointerException
    at org.jboss.as.web.WebDeploymentDefinition$SessionManagerStatsHandler.executeRuntimeStep(WebDeploymentDefinition.java:128)
    at org.jboss.as.controller.AbstractRuntimeOnlyHandler$1.execute(AbstractRuntimeOnlyHandler.java:96)
    at org.jboss.as.controller.AbstractOperationContext.executeStep(AbstractOperationContext.java:601)
    at org.jboss.as.controller.AbstractOperationContext.doCompleteStep(AbstractOperationContext.java:479)
    at org.jboss.as.controller.AbstractOperationContext.completeStepInternal(AbstractOperationContext.java:283)
    at org.jboss.as.controller.AbstractOperationContext.executeOperation(AbstractOperationContext.java:278)
    at org.jboss.as.controller.ModelControllerImpl.internalExecute(ModelControllerImpl.java:231)
    at org.jboss.as.controller.ModelControllerImpl.execute(ModelControllerImpl.java:137)
    at org.jboss.as.jmx.model.ModelControllerMBeanHelper.execute(ModelControllerMBeanHelper.java:471)
    at org.jboss.as.jmx.model.ModelControllerMBeanHelper.getAttribute(ModelControllerMBeanHelper.java:248)
    at org.jboss.as.jmx.model.ModelControllerMBeanHelper.getAttribute(ModelControllerMBeanHelper.java:209)
    at org.jboss.as.jmx.model.ModelControllerMBeanServerPlugin.getAttribute(ModelControllerMBeanServerPlugin.java:94)
    at org.jboss.as.jmx.PluggableMBeanServerImpl.getAttribute(PluggableMBeanServerImpl.java:383)
.
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