We started getting multiple lock wait warnings each hour recently against one of our RTC  backend databases in DB2.  The statement is LOCK TABLE SCM.CONTENT_CLAIMER IN SHARE MODE. 

What are the possible reasons that this is occurring?  Is this multiple people or applications trying to check-out the same file and one user already has the lock?

I looked at the rows inside that table but couldn't get an idea exactly what it's used for.