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ORA-01562: FAILED TO EXTEND ROLLBCK SGMT ERRORS WHEN SPACE SEEMS OK (Doc ID 566592.1)

Last updated on FEBRUARY 27, 2019

Applies to:

Oracle Database - Enterprise Edition - Version 9.2.0.8 to 10.2.0.3 [Release 9.2 to 10.2]
Information in this document applies to any platform.
This problem can occur on any platform.

Symptoms

You are using automatic undo management, there is enough free space in the undo tablespace.
And you see ORA-01562 Errors in the trace files.

On examining the output of querys

SELECT r.name "ROLLBACK SEGMENT NAME ",
p.pid "ORACLE PID",
p.spid "SYSTEM PID ",
NVL ( p.username , 'NO TRANSACTION'),
p.terminal
FROM v$lock l, v$process p, v$rollname r
WHERE l.sid = p.pid(+)
AND TRUNC (l.id1(+)/65536) = r.usn
AND l.type(+) = 'TX'
AND l.lmode(+) = 6
ORDER BY r.name;

 

select s.sid, s.username, r.name "ROLLBACK SEG"
from v$session s, v$transaction t, v$rollname r
where s.taddr=t.addr
and t.xidusn = r.usn;




Most of the rollback segments show that the there are no active transaction

ROLLBACK SEGMENT NAME  ORACLE PID  SYSTEM PID   NVL(P.USERNAME, TERMINAL)

_SYSSMU427$                                                                                       NO TRANSACTION

_SYSSMU932$                                    1253                    3715                oracle UNKNOWN
.
_SYSSMU1052$                                  1950                    27030              oracle UNKNOWN
.
_SYSSMU607$                                                                                       NO TRANSACTION
.
_SYSSMU308$                                                                                       NO TRANSACTION



This problem can occur on a distributed transcation or on a normal transaction.

Changes

 

Cause

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In this Document
Symptoms
Changes
Cause
Solution
References


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