HTTPSession sharing between wars delivered in an EAR failure in standalone-ha.xml

Deploying two Web applications within an EAR achive with the following jboss-all.xml, leads to a failure in deployment when using standalone-ha.xml configuration:
<jboss umlns="urn:jboss:1.0">
<shared-session-config xmlns="urn:jboss:shared-session-config:1.0">
<session-config>
<cookie-config>
<path>/</path>
</cookie-config>
</session-config>
</shared-session-config>
</jboss>

Exception raised:
15:58:52,160 ERROR [org.jboss.as.controller.management-operation] (DeploymentScanner-threads - 2) WFLYCTL0013: Operation ("deploy") failed - address: ([("deployment" => "ear1.ear")]) - failure description:

{"WFLYCTL0180: Services with missing/unavailable dependencies" => [ "jboss.undertow.deployment.default-server.default-host./webapp1.codec.locator is missing [jboss.clustering.web.locator.\"ear1.ear.webapp1.war\"]", "jboss.undertow.deployment.default-server.default-host./webapp2.codec.locator is missing [jboss.clustering.web.locator.\"ear1.ear.webapp2.war\"]" ]}

15:58:52,227 INFO [org.jboss.as.server] (DeploymentScanner-threads - 2) WFLYSRV0010: Deployed "ear1.ear" (runtime-name : "ear1.ear")
15:58:52,230 INFO [org.jboss.as.controller] (DeploymentScanner-threads - 2) WFLYCTL0183: Service status report
WFLYCTL0184: New missing/unsatisfied dependencies:
service jboss.clustering.web.locator."ear1.ear.webapp1.war" (missing) dependents: [service jboss.undertow.deployment.default-server.default-host./webapp1.codec.locator]
service jboss.clustering.web.locator."ear1.ear.webapp2.war" (missing) dependents: [service jboss.undertow.deployment.default-server.default-host./webapp2.
codec.locator]