Local class StackDumpTimer in PrimitiveAnalysisEngineController_impl is synchronizing a block of code using a primitive (Long) which is not a good idea.
Finbugs documentation on this bug says:
"DL: Synchronization on boxed primitive could lead to deadlock (DL_SYNCHRONIZATION_ON_BOXED_PRIMITIVE)
The code synchronizes on a boxed primitive constant, such as an Integer.
private static Integer count = 0;
Since Integer objects can be cached and shared, this code could be synchronizing on the same object as other, unrelated code, leading to unresponsiveness and possible deadlock"