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JBoss ON dashboard fails to display with "Globally uncaught exception: NumberFormatException:For input string" when resource metric graph portlet references an invalid resource or metric

Solution Unverified - Updated 2015-03-16T14:47:32+00:00 -

Issue

Blank dashboard screen with a Globally uncaught exception message
I cannot see or view Dashboard

Following message when attempting to access dashboard:

 Message: Globally uncaught exception
Severity: Error
  Detail: java.lang.NumberFormatException:For input string: "some resource name"

Environment

Red Hat JBoss Operations Network (ON) 3.1
Resource metric graph portlet on affected dashboard for a resource which has been deleted

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