[TAP5-1090] Deleting a live-reloaded class can result in a non-descriptive "Parameter url was null." exception

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 5.2.0
• Fix Version/s: 5.2.0
• Component/s: tapestry-core
• Assignee: Howard Lewis Ship
• Reporter: Howard Lewis Ship
• Created: 29/Mar/10 18:25
• Updated: 01/Apr/10 06:41
• Resolved: 01/Apr/10 06:41

Description

[ERROR] RequestExceptionHandler Processing of request failed with uncaught exception: Parameter url was null.
java.lang.IllegalArgumentException: Parameter url was null.
at org.apache.tapestry5.ioc.internal.util.Defense.notNull(Defense.java:37)
at org.apache.tapestry5.ioc.services.ClassFabUtils.toFileFromFileProtocolURL(ClassFabUtils.java:332)
at org.apache.tapestry5.ioc.internal.AbstractReloadableObjectCreator.updateTrackingInfo(AbstractReloadableObjectCreator.java:204)
at org.apache.tapestry5.ioc.internal.AbstractReloadableObjectCreator.createInstance(AbstractReloadableObjectCreator.java:113)
at org.apache.tapestry5.ioc.internal.AbstractReloadableObjectCreator.createObject(AbstractReloadableObjectCreator.java:106)
at $PageRenderRequestFilter_127aaf92a89._delegate($PageRenderRequestFilter_127aaf92a89.java)
at $PageRenderRequestFilter_127aaf92a89.handle($PageRenderRequestFilter_127aaf92a89.java)
at $PageRenderRequestHandler_127aaf92a8d.handle($PageRenderRequestHandler_127aaf92a8d.java)
at org.apache.tapestry5.services.TapestryModule$35.handle(TapestryModule.java:2254)

This was for a contributed object, but I suspect it would be the same for a service. In any case, this should be detected and an exception along the lines of "Unable to continue because class foo.bar.Baz has been deleted." should be thrown.