IRLM DB2 Region took Multiple SVC Dumps

Products

• Top Secret

Issue/Introduction

We had a IRLM DB2 region take multiple dumps.  IBM case opened and they noticed Top Secret module TSSKPOR1 in the dump. 
Further review shows the TSS XREF Table is full.

Environment

Release : 16.0

Resolution

Review of the dumps show that DB2 is signing the user on when it  should be signing the user off. 
This is filling up storage.
IBM DB2 Support reviewed the dumps again and saw the user being signed on instead of signed off.
IBM APAR AH50267 for FMID HDBCC10.