Yes, it is a possibility.

Since the accumulated delays of SERVER pool and the "Queued tasks" grow constantly and never decrease, what exactly happened in your case is that all the threads of SERVER pool were blocked in some operation, probably the same for all.
As I said in the previous post, in these cases it is very likely that there is a blockage in some calls of Adapters and a thread dump taken during the crisis could help to find the culprit.