I would like to know if having an ActionForm is necessary for each form.
I have a page which has a Logout button. When I click on it I get an error message saying "javax.servlet.ServletException: Cannot retrieve definition for form bean null".

Here's the snippet from struts-config.xml :
 <action path="/logout"
           type="com.labs.argenerator.LogoutAction">
        <forward name="success" path="/Login.jsp"/>
 </action>

Here's the snippet from the jsp page:
<html:form action="logout.do">
<html:submit><bean:message key="button.exit"/></html:submit>
</html:form>

Can someone tell me what is wrong here?

I would like to know if having an ActionForm is necessary for each form.

No, it is not.

Here's the snippet from struts-config.xml : <action path="/logout" type="com.labs.argenerator.LogoutAction"> <forward name="success" path="/Login.jsp"/> </action>Here's the snippet from the jsp page:<html:form action="logout.do"><html:submit><bean:message key="button.exit"/></html:submit></html:form>Can someone tell me what is wrong here?

<html:form/> tag needs a form, so to get rid of error you should:

1) not use this tag, instread use plain HTML <form> tag,
2) add empty, dummy dynaForm and assign it to the action using "name" attribute,
3) not use HTML form at all, but rather <html:link/>.

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Piotr Maj