2186419 - sp_who shows SPIDS with status MAINTENANCE TOKEN - SAP ASE

• sp_who shows spids with a status of MAINTENANCE TOKEN which never die. 
• Spids can be killed but will not go away on their own after the client has disconnected. 
• ASE may also see messages in the errorlog like these:

ncheck_checkconn: Unable to identify thread for fd 81
ncheck_quit: no pid associated with fd 207, vsn = 229, socket type = 2

• This is often due to port scanners accessing the ASE listener port or some other form of 'ping' utility,  including Sybase Central.
• For Business Suite environment, performance issue may be seen together with short dumps with Runtime errors DBIF_DSQL2_SQL_ERROR 30012

• SAP Adaptive Server Enterprise (ASE) 15.7 
• SAP Adaptive Server Enterprise (ASE) 16.0

keepalive, CR786256, CR#786256, 786256, CR786540, 786540, CR#786540, MAINTENANCETOKEN, ncheck quit, ncheck checkconn, sp id, sp who, spid hanging, dead spid, auditing enable , KBA , BC-SYB-ASE , Sybase ASE Database Platform (non Business Suite) , BC-DB-SYB , Business Suite on Adaptive Server Enterprise , Bug Filed