[jbossseam-issues] [JBoss JIRA] Created: (JBSEAM-4312) Exception while checking out transaction causing infinite loop trying to render error page

[Matthew Lieder (JIRA)]

Exception while checking out transaction causing infinite loop trying to render error page
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                 Key: JBSEAM-4312
                 URL: https://jira.jboss.org/jira/browse/JBSEAM-4312
             Project: Seam
          Issue Type: Bug
          Components: Exception Handling
    Affects Versions: 2.2.0.CR1
         Environment: java 6, Tomcat 6, c3p0 0.9.2
            Reporter: Matthew Lieder


We have the following pretty typical exception config in our pages.xml:

	<exception>
		<end-conversation />
		<redirect view-id="/seam/error.xhtml">
			<message severity="error">#{org.jboss.seam.handledException}</message>
		</redirect>
	</exception>

That works great, except when our database server is down. In that case a com.mchange.v2.resourcepool.TimeoutException is thrown and the exception handler is properly called, but Seam then tries to access the database again when rendering the error page and thus the cycle repeats ad infinitum. I don't believe this is specific to the TimeoutException exception or even to c3p0; this seems to be a pretty general problem.

There needs to be some way to prevent Seam from trying to start a transaction while rendering the error page, either always or maybe by an attribute on the <exception> tag.

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