3206853 - DB6: Incomplete IO requests and unexpected long IOCP wait detected

The IOCP related issue found in the db2diag.log:
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2022-05-02-06.23.16.161040-360 E42320681A980        LEVEL: Warning (OS)
PID     : 12345                     TID : 12345          PROC : db2sysc 0
INSTANCE: db2<sid>               NODE : 000           DB   : <sid>     
HOSTNAME: <hostname>
EDUID   : 12345                EDUNAME: db2pclnr (sid) 0
FUNCTION: DB2 UDB, oper system services, sqloLioAIOCollect, probe:22
CALLED  : OS, -, GetMultipleCompletionStatus
OSERR   : ETIMEDOUT (78) "Connection timed out"
MESSAGE : Incomplete IO requests and unexpected long IOCP wait detected.
DATA #1 : I/O Completion Port, PD_TYPE_IO_PORT, 4 bytes
0x000000E1

2022-05-02-06.23.16.674903-360 E42334402A957        LEVEL: Severe (OS)
PID     : 12345              TID : 12345         PROC : db2sysc 0
INSTANCE: db2<sid>              NODE : 000           DB   : <sid>     
HOSTNAME: <hostname>
EDUID   : 12345                EDUNAME: db2pclnr (sid) 0
FUNCTION: DB2 UDB, oper system services, sqloLioAIOCollect, probe:21
CALLED  : OS, -, GetMultipleCompletionStatus
OSERR   : ETIMEDOUT (78) "Connection timed out"
MESSAGE : ALERT - Unexpected long IOCP wait detected.
DATA #1 : I/O Completion Port, PD_TYPE_IO_PORT, 4 bytes
0x000000EE
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SAP on IBM Db2 for Linux, UNIX, and Windows

I/O Completion Port, ETIMEDOUT, Connection timed out, Unexpected long IOCP wait detected , KBA , BC-DB-DB6 , DB2 Universal Database for Unix / NT , Problem