GV$ QUERY FAILS WITH ORA-19202 ORA-12850
(Doc ID 2361532.1)
Last updated on MARCH 10, 2020
Applies to:
Oracle Database Cloud Schema Service - Version N/A and laterOracle Database Exadata Express Cloud Service - Version N/A and later
Oracle Database Exadata Cloud Machine - Version N/A and later
Oracle Cloud Infrastructure - Database Service - Version N/A and later
Oracle Database Backup Service - Version N/A and later
Information in this document applies to any platform.
Symptoms
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data from the Oracle sample schema(s) or Public Documentation delivered with an Oracle database product. Any similarity to actual persons, living or dead,
is purely coincidental and not intended in any manner.
When attempting to SELECT XMLTYPE(
CURSOR(
SELECT 'Source: ENG-OSS_OSSPMP03_BlockingSessions.sql' report, welvih.*
FROM (WITH lk
AS ( SELECT 'Session with SID '
|| s.SID
|| ' (Instance: '
|| l.inst_id
|| ' Prog: '
|| s.PROGRAM
|| ' User: '
|| s.username
|| ' Machine: '
|| s.machine
|| ') is '
|| DECODE(l.BLOCK, 0, 'waiting for', 'blocking')
|| ' the object: '
|| object_name
|| ' (LOCK_TYPE: '
|| DECODE(l.TYPE
,'RT', 'Redo Log Buffer'
,'TD', 'Dictionary'
,'TM', 'DML'
,'TS', 'Temp Segments'
,'TX', 'Transaction'
,'UL', 'User'
,'RW', 'Row Wait'
,l.TYPE)
|| ' LOCK_MODE: '
|| DECODE(l.lmode
,0, 'None'
,1, 'Null'
,2, 'Row Share'
,3, 'Row Excl.'
,4, 'Share'
,5, 'S/Row Excl.'
,6, 'Exclusive'
,LTRIM(TO_CHAR(lmode, '990')))
|| ' LOCK_STATUS: '
|| DECODE(l.BLOCK, 0, 'Not Blocking', 1, 'Blocking', 2, 'Global')
|| ')'
TEXT
,s.SID
FROM gv$lock l
JOIN gv$session s
ON (l.inst_id = s.inst_id
AND l.SID = s.SID
AND s.username != 'SYS')
JOIN gv$locked_object o
ON (o.inst_id = s.inst_id
AND s.SID = o.session_id)
JOIN dba_objects d ON (d.object_id = o.object_id)
WHERE (l.id1, l.id2, l.TYPE) IN (SELECT id1, id2, TYPE
FROM gv$lock
WHERE request > 0)
AND L.CTIME > 60
ORDER BY id1, id2, ctime DESC)
SELECT -- OK Alarm
'osspmp03' APPLICATION
,'BlockingSession_<*>' OBJECT
,'ENG-OSS' MESSAGE_GROUP
,0 SEVERITY
, -- Info(4), Warning(1), Critical(2)
'No blocking session found' TEXT
,'' INSTRID
,'' NOTIFICATION
,'' SN
,'' TYPE
,'' PERF_CURRENT
,'' PERF_WARNING
,'' PERF_CRITICAL
,'' PERF_MAX
FROM DUAL
WHERE NOT EXISTS (SELECT TEXT FROM lk)
UNION ALL
SELECT 'osspmp03' APPLICATION
, 'BlockingSession_'
|| SID
OBJECT
,'ENG-OSS' MESSAGE_GROUP
,CASE WHEN TEXT LIKE '%CPDADMIN%' THEN 4 ELSE 1 END SEVERITY
, -- Info(4), Warning(1), Critical(2)
TEXT
,'' INSTRID
,'' NOTIFICATION
,'' SN
,'' TYPE
,'' PERF_CURRENT
,'' PERF_WARNING
,'' PERF_CRITICAL
,'' PERF_MAX
FROM lk) welvih)).getClobVal()
viewname
FROM DUAL;,
the following error occurs.
ERROR
-----------------------
ERROR:
ORA-19202: Error occurred in XML processing
ORA-12850: Could not allocate slaves on all specified instances: 4 needed, 1
allocated
ORA-06512: at "SYS.XMLTYPE", line 343
ORA-06512: at line 1
The inner cursor works fine - only fails with SELECT XMLTYPE
Changes
Cause
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In this Document
| Symptoms |
| Changes |
| Cause |
| Solution |
| References |