We have a strange issue happening since the last few weeks, where the number of Items in the publishing queue in Rendering state exceed the "RenderThreadCount" of the config. While, the items stuck in rendering continue to be in rendering state but, the new items in the queue get picked up and are published successfully. These stucked items continue to be in the queue until cleared manually. These items are sometimes passed through the queue successfully within minutes.
SDL Tridion 2011 We have in total 3 CMS publishers, with RenderThreadCount set to 3 and deployThreadCount set to 1 on all the 3 publishers. However, the items in rendering sometimes exceed 100+
Can someone please guide me as to how we can identify what has gone wrong with the publishing queue due to which rendering count is continuing to increase?