Random ClassCastException for ErrorReportValve at startup

Issue

• We randomly see the following exception upon startup:

ERROR [org.apache.catalina.core] (MSC service thread 1-4) JBWEB001085: Failed loding specified error report valve class: org.apache.catalina.valves.ErrorReportValve: java.lang.ClassCastException: org.apache.catalina.valves.ErrorReportValve cannot be cast to org.apache.catalina.Container
    at org.jboss.as.web.WebConnectorService$2.containerEvent(WebConnectorService.java:344) [jboss-as-web-7.5.7.Final-redhat-3.jar:7.5.7.Final-redhat-3]
    at org.apache.catalina.core.ContainerBase.fireContainerEvent(ContainerBase.java:1345) [jbossweb-7.5.15.Final-redhat-1.jar:7.5.15.Final-redhat-1]
    at org.apache.catalina.core.ContainerBase.addValve(ContainerBase.java:1204) [jbossweb-7.5.15.Final-redhat-1.jar:7.5.15.Final-redhat-1]
    at org.apache.catalina.core.StandardHost.start(StandardHost.java:462) [jbossweb-7.5.15.Final-redhat-1.jar:7.5.15.Final-redhat-1]
    at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:803) [jbossweb-7.5.15.Final-redhat-1.jar:7.5.15.Final-redhat-1]
    at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:785) [jbossweb-7.5.15.Final-redhat-1.jar:7.5.15.Final-redhat-1]
    at org.apache.catalina.core.StandardEngine.addChild(StandardEngine.java:217) [jbossweb-7.5.15.Final-redhat-1.jar:7.5.15.Final-redhat-1]
    at org.jboss.as.web.WebServerService.addHost(WebServerService.java:167) [jboss-as-web-7.5.7.Final-redhat-3.jar:7.5.7.Final-redhat-3]
    at org.jboss.as.web.WebVirtualHostService.start(WebVirtualHostService.java:98) [jboss-as-web-7.5.7.Final-redhat-3.jar:7.5.7.Final-redhat-3]
    at org.jboss.msc.service.ServiceControllerImpl$StartTask.startService(ServiceControllerImpl.java:1980) [jboss-msc-1.1.5.Final-redhat-1.jar:1.1.5.Final-redhat-1]
    at org.jboss.msc.service.ServiceControllerImpl$StartTask.run(ServiceControllerImpl.java:1913) [jboss-msc-1.1.5.Final-redhat-1.jar:1.1.5.Final-redhat-1]
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) [rt.jar:1.7.0_101]
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) [rt.jar:1.7.0_101]
    at java.lang.Thread.run(Thread.java:745) [rt.jar:1.7.0_101]