When an EAP instance has an EAR deployed to it which contains an EJB module JAR and the EAR is in an unexploded form (archived), attempting to access the admin-console results in the following exception:

ERROR [org.apache.catalina.core.ContainerBase.[jboss.web].[localhost].[/admin-console]] (http-0.0.0.0-8080-1) Exception sending request initialized lifecycle event to listener instance of class org.jboss.on.embedded.LazyStartupListener
java.lang.RuntimeException: Error handling file /opt/jboss/jboss-eap-5.1/jboss-as/server/production/deploy/exolgan-legacy-ejb.ear/exolgan-legacy-ejb.jar
at org.jboss.seam.deployment.URLScanner.handleArchiveByFile(URLScanner.java:134)
at org.jboss.seam.deployment.URLScanner.handle(URLScanner.java:107)
at org.jboss.seam.deployment.URLScanner.scanResources(URLScanner.java:90)
at org.jboss.seam.deployment.StandardDeploymentStrategy.scan(StandardDeploymentStrategy.java:119)
at org.jboss.seam.init.Initialization.create(Initialization.java:130)
at org.jboss.seam.servlet.SeamListener.contextInitialized(SeamListener.java:36)
at org.jboss.on.embedded.LazyStartupListener.initialize(LazyStartupListener.java:182)
at org.jboss.on.embedded.LazyStartupListener.requestInitialized(LazyStartupListener.java:240)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:180)
at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:183)
at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:95)
at org.jboss.web.tomcat.security.SecurityContextEstablishmentValve.process(SecurityContextEstablishmentValve.java:126)
at org.jboss.web.tomcat.security.SecurityContextEstablishmentValve.invoke(SecurityContextEstablishmentValve.java:70)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
at org.jboss.web.tomcat.service.jca.CachedConnectionValve.invoke(CachedConnectionValve.java:158)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:330)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:829)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:599)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:451)
at java.lang.Thread.run(Thread.java:636)
Caused by: java.util.zip.ZipException: error in opening zip file
at java.util.zip.ZipFile.open(Native Method)
at java.util.zip.ZipFile.<init>(ZipFile.java:131)
at java.util.zip.ZipFile.<init>(ZipFile.java:148)
at org.jboss.seam.deployment.URLScanner.handleArchiveByFile(URLScanner.java:123)
... 21 more

The issue can be resolved by adding the following files to admin-console.war/META-INF/

Empty File (seam.properties)

seam-deployment.properties:
org.jboss.seam.deployment.scanners=org.jboss.seam.integration.jbossas.vfs.VFSScanner