ClassCastException with Primefaces GMap OverlaySelect event

Question

I want to show some data inside infoWindow of Gmap. the code is as follow:

<p:gmap center="#{mybean.latitude}, #{mybean.longitude}" zoom="15" 
                    type="ROADMAP" model="#{mybean.mymapModel}" >
        <p:ajax event="overlaySelect" listener="#{mybean.onMarkerSelect}" />  
        <p:gmapInfoWindow >  
            <div class="popup_title prem">Address:</div>
            <div class="popup_address">#{mybean.markerAll.street}, #{mybean.markerAll.zipcode} #{mybean.markerAll.city}</div>
        </p:gmapInfoWindow>  
</p:gmap>

and My ManagedBean

public void onMarkerSelect(OverlaySelectEvent event) {
        marker = (Marker) event.getOverlay();
        markerAll = (myHelperClass) marker.getData();
    }

Everything is working fine in development on my local computer. When the marker is clicked, the data (address) shows up in the infoWindow.
On production I see a lot of ClassCastException like:

FullAjaxExceptionHandler: An exception occurred during processing JSF ajax request. Error page '/error.jsf' will be shown.    
    java.lang.ClassCastException: java.lang.String cannot be cast 
        to com.mypackage.util.myHelperClass
        at com.mypackage.myBean.onMarkerSelect(myBean.java:416)
...
...

The property data of the org.primefaces.model.map.Marker is of type Object and not String!

What am I doing wrong? And why this works sometime and sometimes not?

I'm using Primefaces 5.3.7

Answer 1

I think it's missing the uppercase letter m - myHelperClass by MyHelperClass

public void onMarkerSelect(OverlaySelectEvent event) {
    marker = (Marker) event.getOverlay();
    markerAll = (MyHelperClass) marker.getData();
}