Running the latest stable release of the Imixs JEE Workflow components (imixs-workflow-jee-impl-2.0.1) on a Oracle database can lead into a situation where users did not find any entities or can process new workitems.
The reason for this issue is a query optimizer used in one of the core EJBs. The Problem did not occur on MySQL Database Pools but on Oracle Database Pools.
To fix this problem please use on oracle based workflow systems the following hot fix release:
This patch is available in the subversion repository in /branches. Please let us know if you have any problems. The bug will be fixed in upcoming new 2.0.2 release. Please see also details at Issue Tracker Issue #55.