Errors in emoms.log

Question

Hi everybody,
Im having some problems with the service emctl dbconsole of my database (11.1.0.6.0 on REHL 5). Don't know why it stops usually, and i check emoms.log and see the next error:
2011-06-20 12:02:34,915 [NotificationMgrThread] ERROR em.notification run.1698 - Error checking queue: ORA-25253: listen failed, queue SYSMAN.MGMT_NOTIFY_Q 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.EMD_NOTIFICATION", line 509
ORA-06512: at line 1
what it mean? how to solve it?
In first time i think the service was down because i have a lot of wait sessions, could it be the problem?:
select sum(seconds_in_wait),event,count(*) from v$session_wait group by event order by 3 desc;
sum(seconds_in_wait) Event      count(*)
27256882 SQL*Net message from client      115
195 rdbms ipc message      15
201705 library cache: mutex X      8
0 DIAG idle wait      2
255862 SQL*Net message to client      2
704 Streams AQ: waiting for time management or cleanup tasks 1
8 Streams AQ: qmn coordinator idle wait      1
2136954 VKTM Logical Idle Wait      1
4 Space Manager: slave idle wait      1
8 Streams AQ: qmn slave idle wait      1
2 pmon timer      1
84 smon timer      1
4 Streams AQ: waiting for messages in the queue      1
Thanks in advance
Edited by: Fran on 20-jun-2011 3:11

Answer 1

Hi Helius,
Thanks for your reply, i see in the document you told me:
"What is the relationship between the Events Controller which can be used to stop/start the queues and the concurrent programs?
The queues must always be enabled (started). The listeners will run when scheduled and will terminate with an error ORA-25253 if a queue is disabled (stopped).
The start/stop option provided by the Events controller is an extra DBA provision provided to the system administrator and can also be used when suggested by development to debug queue problems."
And i just see that my MGMT_NOTIFY_Q is not Enqueue. But i don't know if this must be Enqueue='Yes'.
SQL> select OWNER, NAME, ENQUEUE_ENABLED from dba_queues where name='MGMT_NOTIFY_Q';
OWNER NAME ENQUEUE
SYSMAN MGMT_NOTIFY_Q NO
if i change the enqeue to YES, the problem will be solved?