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EM 12c: Enterprise Manager 12c Cloud Control is not Receiving any Alerts from its Agents (Doc ID 1607640.1)

Last updated on DECEMBER 20, 2019

Applies to:

Enterprise Manager Base Platform - Version and later
Information in this document applies to any platform.


No alerts are being generated in the Enterprise Manager 12c Cloud Control console from any agent.

a) From the .../gc_inst/em/EMGC_OMS1/sysman/log/emoms.trc, the following is logged:

SYSMAN.EM_EVENT_BUS is not enabled for dequeue
ORA-06512: at "SYS.DBMS_AQ", line 675
ORA-06512: at "SYS.DBMS_AQ", line 702
ORA-06512: at "SYSMAN.EM_EVENT_BUS", line 2417
ORA-06512: at line 1



b) EMDIAG output shows the following:

3. Disabled AQ time monitor

  INST_ID NAME                                               VALUE
---------- -------------------------------------------------- --------------------------------------------------------------------------------
        1 aq_tm_processes                                    0


8001. Event failures in the last 24 hours

-------------------- ---------- ---------------------------------------------------------------------------------------------------
21-NOV-2013 18:09:42     -20304 Unexpected error during: ENQUEUE(M11/2) ORA-25207: enqueue failed, queue SYSMAN.EM_EVENT_BUS is disabled from enqueueing



c) A SQL query on the SYSMAN.EM_EVENT_BUS table confirms the log file message and the EMDIAG output:

SQL> select count(1) from AQ$_EM_EVENT_BUS_TABLE_L where msgid = '00000000000000000000000000000000';



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