We're using wildfly 15 with infinispan upgraded to 9.4.14.

We have a replicated-cache:

                <replicated-cache name="nodeTimeoutEvent">

                    <object-memory size="2"/>

                    <expiration interval="1000"/>

                    <file-store passivation="false" purge="false"/>

                </replicated-cache>

We have a listener:

    @CacheEntryExpired
    public void entryExpired( CacheEntryExpiredEvent<string, nodetimeoutflowevent=""> event )
    {
        if ( event.getValue() == null )
        {
           LOGGER.debug( "Value was null" );
       
        }
        else
        {
            LOGGER.debug( "Node timeout: {}", event.getValue() );
         
        }
    }

Pushing 4 entries into the cache with a lifespan of 10 seconds.    The listener receives 4 events however 2 of them have a null value.  (The key is present and correct)

The number of entries with a null value is directly related to the object-memory size="2".     Setting that to 5 and pushing 8 entries,  will result in 3 entries having a null value in the expiration event

Is this expected behaviour?