2987082 - Connection hang and cannot be killed when changing the thread pool - SAP ASE

• Connection hangs and cannot be killed. 
• sp_who output show (many) processes in "maintanance token"
  
  
• This connection was assigned to a specific thread pool and re-assigned to another thread pool while active.
• A "dbcc stacktrace" on a problem spid shows the connection in upsleepgeneric with functions csimtx_lock & csi_aes_cipher
• The full stack is likely the following. However, stack patterns can vary and may be different
  
  upsleepgeneric
  csimtx_lock
  csi_aes_cipher
  syb_get_sess_pwd
  lt_extend_beginxact
  xact__beginxact
  xact__begin_local
  xact_begin

create thread pool, sp_bindexeclass, sp_addexeclass, hang, sleep, stuck , KBA , BC-SYB-ASE , Sybase ASE Database Platform (non Business Suite) , Bug Filed