I am using Oracle E-business Suite R12, Database version 11g.
**My workaround:**
I am trying to solve an error. I have followed this oracle metalink doc (Doc ID 358151.1)to fix the error. Whenever I try to do the first step , Oracle detected deadlock.
ERROR at line 1:
ORA-04020: deadlock detected while trying to lock object
30x0C2ABE5980x0C798B3F80x0D9CA49D8
ORA-06512: at "SYS.DBMS_AQADM_SYS", line 7541
ORA-06512: at "SYS.DBMS_AQADM", line 441
ORA-06512: at line 5
So, I have to fix ora-04020 so I can later be able to recreate the existing subscriper (by dropping the the existing one ,then adding a new one).
1. I tried to bounce the applications and the database.
2. I compiled the apps schema.
3. I tried to find out where is the lock and which schema is blocking the other so I can kill that session:
sql> SELECT
c.owner,
c.object_name,
c.object_type,
b.SID,
b.serial#,
b.status,
FROM
v$locked_object a ,
v$session b,
dba_objects c
WHERE
b.SID = a.session_id
AND
a.object_id = c.object_id;
OWNER OBJECT_NAME OBJECT_TYPE SID SERIAL# STATUS
----- ------------- ---------- ------ ------- -----------
APPLSYS FND_CONCURRENT_QUEUES TABLE 152 3 INACTIVE
APPLSYS FND_CONCURRENT_REQUESTS TABLE 466 7 INACTIVE
Then tried to find out which session is blocking the other to kill it:
sql>SELECT l1.SID ||' IS BLOCKING '|| l2.SID
FROM v$lock l1, v$lock l2
WHERE l1.BLOCK =1 AND l2.request > 0
AND l1.id1=l2.id1
AND l1.id2=l2.id2;
But I got no returned rows.
Some of the suggestions in the internet state that deadlock occurs when there are invalid objects in the database.
So, what I did next is:
I re-compiled the invalid objects by running $ORACLE_HOME/rdbms/admin/utlrp.sql
That script returned an output. The following is a part of the output:
ERROR at line 1:
ORA-04063: package body "SYS.UTL_RECOMP" has errors
ORA-06508: PL/SQL: could not find program unit being called: "SYS.UTL_RECOMP"
ORA-06512: at line 4
and this was part of the output also:
OBJECTS WITH ERRORS
-------------------
1
Note: I am facing this issue after applying a patch. And it's been over 5 days since the deadlock was detected, even though most of the suggestions regarding to the deadlock says that oracle will manage the release itself. Explicit release not required.
Any idea on how to solve this issue? Your suggestion would be much appreciated.