Cometd-Tapestry IllegalStateException

Hi everyone, I have implemented a tapestry-cometd integration

<dependency>
<groupId>org.lazan</groupId>
<artifactId>tapestry-cometd</artifactId>
<version>0.9.17</version>
</dependency>

Our usage of the component is

<t:cometd.PushTarget topic="prop:channelMenuItems"
event="updateMenuItems" update="replace" session="true"/>

and in UAT environment that runs under Tomcat I got the following
exception.

java.lang.IllegalStateException
!session
Filter stack framesStack trace

org.cometd.server.transport.HttpTransport$HttpContext.setHttpSessionAttribute(HttpTransport.java:177)

org.lazan.t5.cometd.services.internal.BayeuxContextHttpSession.setAttribute(BayeuxContextHttpSession.java:31)

org.apache.tapestry5.internal.services.SessionImpl.setAttribute(SessionImpl.java:57)

org.apache.tapestry5.internal.services.SessionApplicationStatePersistenceStrategy.set(SessionApplicationStatePersistenceStrategy.java:73)

org.apache.tapestry5.internal.services.SessionApplicationStatePersistenceStrategy.getOrCreate(SessionApplicationStatePersistenceStrategy.java:58)

org.apache.tapestry5.internal.services.SessionApplicationStatePersistenceStrategy.get(SessionApplicationStatePersistenceStrategy.java:44)

org.apache.tapestry5.internal.services.ApplicationStateManagerImpl$ApplicationStateAdapter.getOrCreate(ApplicationStateManagerImpl.java:50)

org.apache.tapestry5.internal.services.ApplicationStateManagerImpl.get(ApplicationStateManagerImpl.java:133)

org.apache.tapestry5.internal.transform.ApplicationStateWorker$1.get(ApplicationStateWorker.java:75)

com.bomahabo.flow.tapestry.components.layout.MenuProfile.conduit_get_user(MenuProfile.java)

com.bomahabo.flow.tapestry.components.layout.MenuProfile.getPageNotificationNumber(MenuProfile.java:135)

It is probably worth nothing that this doesn't happen on the first few
triggers of the push event but at some point in the near future.

Has anyone seen something similar before?