2838804 - DB2 does not stop successfully after db2stop issued

• Db2stop fails with the following error and stop does not succeed.
  
  2019-01-01-00.00.00 I720607A1381 LEVEL: Event
  PID : 000000000 TID : 1 PROC : db2stop
  INSTANCE: db2sid NODE : 000
  HOSTNAME: Host
  EDUID : 1
  FUNCTION: DB2 UDB, base sys utilities, sqleIssueStartStop, probe:10980
  MESSAGE : ZRC=0xFFFFE86B=-6037
  SQL6037N START or STOP DATABASE MANAGER timeout value was reached.
  
  
• ps -elf output:
  ----------------------------------------------------------------
  F S UID PID PPID C PRI NI ADDR SZ WCHAN STIME TTY TIME CMD
  *snip*
  4 S root 24200 1 0 99 19 - 300894 futex_ 3/21 ? 00:00:00 db2wdog
  0 [db2inst1]
  4 Z db2inst1 24204 24200 1 99 19 - 0 exit 3/21 ? 00:19:57
  [db2sysc] <defunct>
  5 S root 24219 24200 1 99 19 - 301534 msgrcv 3/21 ? 00:13:30
  db2ckpwd 0

Db2 Linux, and Windows 10.5 and 11.1

 ADM0503C, SQL6036N , KBA , BC-DB-DB6-DBA , Database Administration , Problem