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https://issues.apache.org/jira/browse/TAPESTRY-1522?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12513837
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Sergey Kashin commented on TAPESTRY-1522:
-----------------------------------------

I'm upgrade 4.1.2 to 4.1.3 SNAPSHOT

when try to test previous functional by updating elements by EventListener
id have not contain _ symbol

found exception
---------------------------------------------------------------
[ +/- ] Exception:
java.lang.NullPointerException
Stack Trace:

    * java.lang.String.endsWith(Unknown Source)
    * 
org.apache.tapestry.internal.event.impl.ComponentEventInvoker.invokeFormListeners(ComponentEventInvoker.java:107)
    * 
$IComponentEventInvoker_113dd5052af.invokeFormListeners($IComponentEventInvoker_113dd5052af.java)
    * org.apache.tapestry.form.FormSupportImpl.rewind(FormSupportImpl.java:625)
    * org.apache.tapestry.form.Form.renderComponent(Form.java:196)
    * org.apache.tapestry.AbstractComponent.render(AbstractComponent.java:725)
    * 
org.apache.tapestry.services.impl.DojoAjaxResponseBuilder.render(DojoAjaxResponseBuilder.java:627)
---------------------------------------------------------------
because componentId is null in ComponentEventInvoker.java:107

add additional condition  (componentId!=null)
test again 
work's but not correct:
now execute all methods with @EventListener in the Action. 

downgrade to 4.1.2




> @EventListener is not been called if target ids contains _
> ----------------------------------------------------------
>
>                 Key: TAPESTRY-1522
>                 URL: https://issues.apache.org/jira/browse/TAPESTRY-1522
>             Project: Tapestry
>          Issue Type: Bug
>          Components: XHR/dhtml/Ajax
>    Affects Versions: 4.1.2
>         Environment: MacOSX 10.4 / Firefox 2.0.3
>            Reporter: Eric BIANCHI
>            Assignee: Jesse Kuhnert
>             Fix For: 4.1.3
>
>
> method is not being called if the target id of the EventListener contains _
> watch_menu doesn't work whereas watchMenu works

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