DistributableSessionManager.getSession で ConcurrentModificationException が出力される

Issue

クラスタリングが有効になっている場合、次の例外が server.log に記録されることはめったにありません。その原因と対処法は?
JBoss EAP 7.2.0 - 7.2.9:

12:18:28,197 ERROR [io.undertow.request] (default task-2) UT005023: Exception handling request to /testapp/session: java.util.ConcurrentModificationException
    at java.util.HashMap$HashIterator.nextNode(HashMap.java:1469)
    at java.util.HashMap$KeyIterator.next(HashMap.java:1493)
    at org.wildfly.clustering.web.infinispan.session.InfinispanSessionManager.findListeners(InfinispanSessionManager.java:346)
    at org.wildfly.clustering.web.infinispan.session.InfinispanSessionManager.triggerPostActivationEvents(InfinispanSessionManager.java:334)
    at org.wildfly.clustering.web.infinispan.session.InfinispanSessionManager.findSession(InfinispanSessionManager.java:226)
    at org.wildfly.clustering.web.undertow.session.DistributableSessionManager.getSession(DistributableSessionManager.java:211)
    at io.undertow.servlet.spec.ServletContextImpl.getSession(ServletContextImpl.java:858)
    at io.undertow.servlet.spec.ServletContextImpl.getSession(ServletContextImpl.java:933)
        ...

JBoss EAP 7.3.0 - 7.3.6:

10:44:44,991 ERROR [io.undertow.request] (default task-2) UT005023: Exception handling request to /testapp/session: java.util.ConcurrentModificationException
    at java.util.HashMap$HashIterator.nextNode(HashMap.java:1469)
    at java.util.HashMap$KeyIterator.next(HashMap.java:1493)
    at org.wildfly.clustering.web.cache.session.ImmutableFilteringHttpSession.getAttributes(ImmutableFilteringHttpSession.java:57)
    at org.wildfly.clustering.web.cache.session.ImmutableSessionActivationNotifier.notify(ImmutableSessionActivationNotifier.java:63)
    at org.wildfly.clustering.web.cache.session.ImmutableSessionActivationNotifier.postActivate(ImmutableSessionActivationNotifier.java:58)
    at org.wildfly.clustering.web.cache.session.coarse.CoarseSessionAttributes.<init>(CoarseSessionAttributes.java:57)
    at org.wildfly.clustering.web.infinispan.session.coarse.CoarseSessionAttributesFactory.createSessionAttributes(CoarseSessionAttributesFactory.java:131)
    at org.wildfly.clustering.web.infinispan.session.coarse.CoarseSessionAttributesFactory.createSessionAttributes(CoarseSessionAttributesFactory.java:62)
    at org.wildfly.clustering.web.cache.session.CompositeSessionFactory.createSession(CompositeSessionFactory.java:118)
    at org.wildfly.clustering.web.infinispan.session.InfinispanSessionManager.findSession(InfinispanSessionManager.java:181)
    at org.wildfly.clustering.web.cache.session.ConcurrentSessionManager$2.apply(ConcurrentSessionManager.java:66)
    at org.wildfly.clustering.web.cache.session.ConcurrentSessionManager$2.apply(ConcurrentSessionManager.java:63)
    at org.wildfly.clustering.ee.cache.SimpleManager.apply(SimpleManager.java:52)
    at org.wildfly.clustering.web.cache.session.ConcurrentSessionManager.findSession(ConcurrentSessionManager.java:70)
    at org.wildfly.clustering.web.undertow.session.DistributableSessionManager.getSession(DistributableSessionManager.java:227)
    at io.undertow.servlet.spec.ServletContextImpl.getSession(ServletContextImpl.java:874)
    at io.undertow.servlet.spec.ServletContextImpl.getSession(ServletContextImpl.java:964)
    at io.undertow.servlet.handlers.security.CachedAuthenticatedSessionHandler.handleRequest(CachedAuthenticatedSessionHandler.java:69)
        ...

さらに、キャッシュコンテナーの設定は、standalone-full-ha.xml のデフォルトのままとなります。

<cache-container name="web" default-cache="dist" module="org.wildfly.clustering.web.infinispan">
    <transport lock-timeout="60000"/>
    <distributed-cache name="dist">
        <locking isolation="REPEATABLE_READ"/>
        <transaction mode="BATCH"/>
        <file-store/>
    </distributed-cache>
</cache-container>