2520909 - DB6: "Requesting too many semaphores" error

You can not execute any SQL statement using DB2 CLP.

SQL0902C A system error occurred. Subsequent SQL statements cannot be processed.
IBM software support reason code: "". SQLSTATE=58005

db2diag.log

2017-08-08-11.30.47.802805+540 I12593456E493         LEVEL: Severe
PID     : 123456               TID : 1                     PROC : db2fmp  
INSTANCE: db2abc               NODE : 000            DB   : abc     
APPID   : *LOCAL.db2abc.170807151441
HOSTNAME: abcd
FUNCTION: DB2 UDB, database application extension for DB/DBM config, dbm_get_cfg, probe:30
MESSAGE : SQL0902C  A system error occurred. Subsequent SQL statements cannot 
          be processed. IBM software support reason code: "".

2017-08-08-11.30.47.844304+540 I12593950E464         LEVEL: Severe
PID     : 123456                TID : 1                       PROC : db2sysc 0
INSTANCE: db2abc               NODE : 000
HOSTNAME: abcd
EDUID   : 16                   EDUNAME: jdoe 3
FUNCTION: DB2 UDB, common communication, sqlccGetIPCs, probe:50
RETCODE : ZRC=0x850F0081=-2062614399=SQLO_SSEM_EXCEED_MAX
          "Requesting too many semaphores"
          DIA8336C Requested too many semaphores.

In an earlier db2diag.log, you see

2017-08-08-00.00.00.230954+540 I2165284E412          LEVEL: Severe
PID     : 123456                 TID : 1                        PROC : db2sysc 0
INSTANCE: db2abc               NODE : 000
HOSTNAME: jdoe
FUNCTION: DB2 UDB, oper system services, sqlo_waitlist::initialize, probe:10
MESSAGE : SysV semget failed with errno:
DATA #1 : Hexdump, 4 bytes
0x00007F8E31FFDAF0 : 1C00 0000                                  ....

2017-08-08-00.00.00.259320+540 I2165697E414          LEVEL: Severe
PID     : 123456                 TID :1                         PROC : db2sysc 0
INSTANCE: db2abc               NODE : 000
HOSTNAME: abcd
FUNCTION: DB2 UDB, oper system services, sqloGetShrEDUWaitElem, probe:70
MESSAGE : waitlist initialization failed, zrc=
DATA #1 : Hexdump, 4 bytes
0x00007F8E31FFDB9C : 8100 0F85                                  ....

2017-08-08-00.00.00.287382+540 E2166112E476          LEVEL: Severe
PID     : 123456                 TID : 1                        PROC : db2sysc 0
INSTANCE: db2abc              NODE : 000
HOSTNAME: abcd
FUNCTION: DB2 UDB, oper system services, sqloEDUEntry, probe:10
CALLED  : DB2 UDB, oper system services, sqloGetShrEDUWaitElem
RETCODE : ZRC=0x850F0081=-2062614399=SQLO_SSEM_EXCEED_MAX
          "Requesting too many semaphores"
          DIA8336C Requested too many semaphores.

2017-08-08-00.00.00.314470+540 I2166589E416          LEVEL: Severe
PID     : 123456                 TID : 1                        PROC : db2sysc 0
INSTANCE: db2abc              NODE : 000
HOSTNAME: abcd
EDUID   : 16                   EDUNAME: jdoe 3
FUNCTION: DB2 UDB, global services, sqzEDUObj::StartEDU, probe:10
RETCODE : ZRC=0x870F00F2=-2029059854=SQLO_NORES
          "no resources to create process or thread"

2017-08-08-00.00.00.523897+540 I2167884E498          LEVEL: Severe
PID     : 123456                 TID : 1                        PROC : db2sysc 0
INSTANCE: db2abc              NODE : 000
HOSTNAME: abcd
EDUID   : 16                   EDUNAME: jdoe 3
FUNCTION: DB2 UDB, base sys utilities, sqeAgentServices::RequestAgentForAppl, probe:2118
RETCODE : ZRC=0xFFFFFB37=-1225
          SQL1225N  The request failed because an operating system process, 
          thread, or swap space limit was reached.

IBM Db2 on Linux and Unix operating system
Db2 11.1 or Db2 10.5

SQL1225N, DIA8336C, ADM7519W, SQLO_SSEM_EXCEED_MAX, semaphores, SysV semget, resource , KBA , dia8336c , adm7519w , semaphores , sql1225n , BC-DB-DB6 , DB2 Universal Database for Unix / NT , BC-DB-DB6-DBA , Database Administration , Problem