Resolution
The root cause was not identified, but after upgrading to both Tomcat 7.0.59 and CloudBees Jenkins Enterprise 1.596 this issue was alleviated.
This article is part of our Knowledge Base and is provided for guidance-based purposes only. The solutions or workarounds described here are not officially supported by CloudBees and may not be applicable in all environments. Use at your own discretion, and test changes in a safe environment before applying them to production systems.