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SQL> select count(*) from WWork;

COUNT(*)
----------
116114

select count(*) from WWork where Work_WorkID = 100;
select count(*) from WWork where Work_WorkID = 100
*
ERROR at line 1:
ORA-00600: internal error code, arguments: [25012], [15], [8], [], [], [], [],
[]

Tablespace id 15 is the same where the index is created.

analyze table livelink.WWORK validate structure cascade;

analyze table livelink.WWORK validate structure cascade
*
ERROR at line 1:
ORA-00600: internal error code, arguments: [25012], [15], [8], [], [], [], [],
[]

analyze index livelink.WWORK_PRIMARY validate structure;
analyze index livelink.WWORK_PRIMARY validate structure
*
ERROR at line 1:
ORA-08100: index is not valid - see trace file for diagnostics

I'm wondering if the issue could be resolved recreating the index.

alter index WWORK_PRIMARY rebuild online noparallel;

On the alert log file, ORA-00600 began at:
Sun Jun 5 23:29:10 2011
Errors in file /u001/app/oracle/admin/motpcom/udump/motpcom_ora_26554.trc:
ORA-00600: internal error code, arguments: [ktbair1], [1], [6], [], [], [], [], []
Mon Jun 6 00:35:51 2011
Thread 1 advanced to log sequence 303722
Current log# 19 seq# 303722 mem# 0: /u002/oradata/motpcom/redo19.log
Mon Jun 6 00:35:51 2011
And then below error often raised in alert log:
Mon Jun 6 02:45:00 2011
Errors in file /u001/app/oracle/admin/motpcom/udump/motpcom_ora_28348.trc:
ORA-00600: internal error code, arguments: [25012], [15], [8], [], [], [], [], []
Mon Jun 6 02:50:01 2011
I also found other errors:
Mon Jun 6 05:00:01 2011
ORA-01555 caused by SQL statement below (Query Duration=18448 sec, SCN: 0x09f0.52bb91c8):
Mon Jun 6 05:00:01 2011
SELECT COUNT(d.dataid)
FROM allemployees a, networks_dataids d, kuaf k, dversdata v
WHERE k.name=a.user_id(+) AND d.userid=k.id AND a.user_id is null
Mon Jun 6 05:00:13 2011
Errors in file /u001/app/oracle/admin/motpcom/udump/motpcom_ora_28348.trc:
ORA-00600: internal error code, arguments: [25012], [15], [8], [], [], [], [], []
Mon Jun 6 05:05:13 2011
And
Tue Jun 7 02:02:14 2011
Errors in file /u001/app/oracle/admin/motpcom/udump/motpcom_ora_25842.trc:
ORA-07445: exception encountered: core dump [00000001011B8AD8] [SIGSEGV] [Address not mapped to object] [0x000000A88] [] []
Tue Jun 7 02:03:11 2011
And
Tue Jun 7 02:41:35 2011
Errors in file /u001/app/oracle/admin/motpcom/udump/motpcom_ora_27325.trc:
ORA-00600: internal error code, arguments: [2662], [2544], [1396224900], [28954], [3445424704], [786437], [], []
Tue Jun 7 02:41:35 2011
Errors in file /u001/app/oracle/admin/motpcom/udump/motpcom_ora_27325.trc:
ORA-00603: ORACLE server session terminated by fatal error
ORA-00600: internal error code, arguments: [2662], [2544], [1396224900], [28954], [3445424704], [786437], [], []
Tue Jun 7 02:41:59 2011 

SQL> select count(*) FROM WWork where Work_WorkID=100;
select count(*) FROM WWork where Work_WorkID=100
*
ERROR at line 1:
ORA-00600: internal error code, arguments: [25012], [15], [8], [], [], [], [],
[]


SQL> alter index WWORK_PRIMARY rebuild online noparallel;

Index altered.

SQL> select count(*) FROM WWork where Work_WorkID=100;

COUNT(*)
----------
0

Index corruptions do not always mean that there is a Bug.
Indexes corrupt when the transaction ID that associates it with its data does not match.
In majority of the cases, this happens when a table has a large amount of DDL or DML processing as in a OLAP
processing. The index buffer cache is over written with an incorrect transaction id and an error results.
The error could be a ORA-00600 [25027] error, an ORA-8102/8103, or another ORA-00600 error.
Possibly, adding another index may resolve the issue of relying on just one index.

In addition, the index space must be reviewed to determine whether there is enough space.
As in the first example above, if there isn't space, then the index can be overwritten and an error can appear.
I suggest reading My Oracle Knowledge Note 33343.1 "How to Find Out How Much Space an Index is Using" which provides select
statements to show the actual usage of blocks within an index. This gives an idea of how 'full' an index is and
allows the DBA to adjust next extent sizes etc.

In addition, you can start the Index Tuning Wizard from Enterprise Manager in order to get advice on the indexes within the database.

We would like to emphasize that the best method to resolve a corrupt index is to drop and recreate it and not use a rebuild.
If this index corrupts again, then we suggest that it be dropped and recreated.


ORA-600 [25012] "Relative to Absolute File Number Conversion Error"


Note: For additional ORA-600 related information please read Note:146580.1

PURPOSE:            
  This article discusses the internal error "ORA-600 [25012]", what 
  it means and possible actions. The information here is only applicable 
  to the versions listed and is provided only for guidance.
 
ERROR:              
  ORA-600 [25012] [a] [b] [c]
 
VERSIONS:
  versions 8.0 and above
 
DESCRIPTION:

  We are trying to generate the absolute file number given a tablespace 
  number and relative file number and cannot find a matching file number
  or the file number is zero.
 
ARGUMENTS:          
  Arg [a] Tablespace Number 
  Arg [b] Relative file number
  Arg [c] Absolute file number (This arg is present is more recent releases)
 
FUNCTIONALITY:      
  KERNEL FILE MANAGEMENT TABLESPACE COMPONENT
 
IMPACT:             
  POSSIBLE PHYSICAL CORRUPTION
 
SUGGESTIONS:        

  The possibility of physical corruption exists.

  Obtain the trace files and alert.log for this error and log a Service Request
  with Oracle Support Services for diagnosis.

  If the Arg [b] Relative file number returns 0 (zero), look for fake indexes
  that can cause this error.

  The following query list fake indexes :

  select a.*,b.flags from dba_objects a, sys.ind$ b
  where a.object_id = b.obj#
  and bitand(b.flags,4096)=4096;

  Known Issues:




Known Bugs
You can restrict the list below to issues likely to affect one of the following versions by clicking the relevant button:


    NB	Bug	Fixed	Description
    	5653641 	11.2.0.1 	Corrupt dictionary from DROP TABLESPACE containing _offline_rollback_segments
    * 	8198906 	10.2.0.5, 11.2.0.1 	OERI [kddummy_blkchk] / OERI [5467] for an aborted transaction of allocating extents
    	4925342 	9.2.0.8, 10.2.0.3, 11.1.0.6 	OERI [25027] / OERI [25012] on IOT analyze estimate statistics
    	3258674 	9.2.0.7, 10.1.0.4, 10.2.0.1 	QMN process may dump or raise an internal error during DML
    	4186885 	10.2.0.1 	Partition numbers for IOT index/overflow segments are not synchronized
    	3751874 	9.2.0.6, 10.1.0.4, 10.2.0.1 	OERI[25012] can occur when _old_connect_by_enabled set to true
    	3430832 	9.2.0.6, 10.1.0.3, 10.2.0.1 	OERI[25012] in DML after ONLINE create index against PARTITIONED table
    	3915343 	9.2.0.7, 10.1.0.5, 10.2.0.1 	OERI [25012] on COMMIT with refresh ON-COMMIT Materialized view over cluster
    	4305391 	9.2.0.7, 10.1.0.5, 10.2.0.1 	OERI[25012] with kditalp can occur during a temporary LOB operation
    P* 	6047085 		Linux x64-64: SGA corruption / crash following any ORA-7445
    	2526334 	9.2.0.3, 10.1.0.2 	OERI:25012 from AND EQUAL with B-Tree and DOMAIN index
    	2531519 	9.2.0.3, 10.1.0.2 	OERI:[25012] from parallel direct load of bitmap managed segments
    	3150268 	9.2.0.5, 10.1.0.2 	OERI[kcbgcur_1] / OERI:25012 deleting rows from PARENT table with LIST subpartitions
    	3070856 	9.2.0.5, 10.1.0.2 	OERI:12700 / 25012 / ktrexc_1 on transported tablespace with SMU
    	3771508 	9.2.0.7 	OERI[kcbgtcr_1] / OERI[25012] selecting from V$AQ in a shared server
    	3900237 	9.2.0.7 	OERI[25012] changing length of indexed column for a global temporary table
    	1834530 	8.1.7.4, 9.0.1.4, 9.2.0.1 	OERI:25012 / wrong results after EXCHANGE 
        PARTITION with indexes with different FREELIST /FREELIST GROUPS
    	1698789 	9.2.0.1 	Wrong results, ORA-1410, ORA-8103, OERI:25012 on SELECT of UNSCOPED REF with ROWID
    	2189615 	8.1.7.4, 9.0.1.4, 9.2.0.1 	OERI:25012 / OERI:504 [cache buffers chains] selecting from certain V$ tables
    	1784708 	8.1.7.3, 9.0.1.1, 9.2.0.1 	OERI:KCBGTCR_1/OERI:25012 accessing LONG / LONG RAW in a HASH CLUSTER
    	1872985 	9.0.1.2, 9.2.0.1 	Dump / OERI:25012 from BITMAP CONVERSION of INDEX on GLOBAL TEMPORARY TABLE
    	1968815 	9.0.1.2, 9.2.0.1 	OERI:25012 possible from SMON following DROP TABLESPACE command
    	2287815 	9.0.1.4, 9.2.0.1 	OERI:KTSPISCHNT / OERI:25012 after exchange PARTITION with bitmap managed segments
    	2184731 	8.1.7.4, 9.2.0.1 	OERI:25012 possible from index prefetch
    	1837529 	8.1.7.3, 9.0.1.1, 9.2.0.1 	OERI:KFTR2BZ_1/OERI:25012 from CREATE sub-partitioned local INDEX ONLINE
    	2214167 	9.0.1.4, 9.2.0.1 	OERI:25012 / wrong results possible after TRUNCATE of bitmap managed index
    	2212389 	9.0.1.4, 9.2.0.1 	OERI:25012 / Cursor frame memory corruption when cursor with BINDS aged out / reloaded
    	1788648 	8.1.7.3, 9.0.1.1, 9.2.0.1 	OERI:25012 [2147483647] possible selecting from certain V$ views
    	1527982 	8.1.7.2, 9.0.1.0 	OERI:25012 / Bitmap indextable mismatch after UPDATE of PARTITION KEY moves rows
    	1949273 	8.1.7.3, 9.0.1.0 	OERI:25012 / ORA-1555 / ORA-22922 accessing LOB data after ALTER TABLE MOVE lob
    	1264970 	8.1.7.1, 9.0.1.0 	OERI:25012 / OERI:6050 possible coalescing index with freelists
    	1396571 	8.0.6.3, 8.1.6.3, 8.1.7.1, 9.0.1.0 	OERI:25012 possible importing with TRANSPORT_TABLESPACE=Y
    	1678963 	8.1.7.2, 9.0.1.0 	OERI:25012 / OERI:4142 possible on TRUNCATE of a table with a CLOB column
    	1297674 	8.0.6.2, 8.1.6.3, 8.1.7.0 	OERI:25012 Analyzing partitioned table with ESTIMATE
    	1138239 	8.1.6.2, 8.1.7.0 	OERI-25012 possible on direct read from plugged in (transportable) tablespace
    	1228658 	8.1.6.2, 8.1.7.0 	Create INDEX on SNAPSHOT/MV can produce corrupt index (OERI:13004 / OERI:25012 / ORA-1499)
    	1108002 	8.1.7.0 	OERI:25012 when DBMS_STATS tries to gather stats for a GLOBAL TEMPORARY table
    	986928 	8.1.7.0 	DBMS_SPACE.UNUSED_SPACE reports OERI:25012 for TEMPORARY tables
    	1312233 	8.1.6.3, 8.1.7.0 	OERI:25012 / OERI:KCBGCUR_1 possible on PQ STAR query with PARTITIONED fact table
    	718499 	8.0.6.1, 8.1.5.0 	OERI:25012 possible on OPS parallel create index
    	677243 	8.0.6.0 	OERI:kdddgbX on DELETE / UPDATE / SELECT for UPDATE with an invalid ROWID
    	679817 	8.0.5.1 	OERI:25012 from view containing 2+ LOB columns
    	595698 	8.0.4.3, 8.0.5.0 	DELETE on table with many child constraints may dump.

        '*' against a bug indicates that an alert exists for that issue.
        '+' indicates a particularly notable bug.
        'P' indicates a port specific bug.
        "OERI:nnnnn" is used as shorthand for ORA-600 [nnnnn]. 

Symptom(s)
~~~~~~~~~~

ORA-600 [25012] errors with same first argument and different
second arguments (second arguments changes during every SELECT Run)

Eg.:

ORA-600 [25012], [5], [1023], [], [], [], []


The first argument corresponds to a tablespace and second argument
corresponds to a file number.

The tablespace points to an index tablespace


Cause
~~~~~

Bug:2184731


Fix
~~~~

Bug:2184731 is fixed in 8.1.7.4 and 9.2

The workaround is to set _db_file_noncontig_mblock_read_count=1.


References
~~~~~~~~~~

Note:100073.1  ORA-600 [25012] "Relative to Absolute File Number 
                 Conversion Error"

Bug:2184731    ORA-600 [25012] WHEN SELECT FROM A TABLE USING AN INDEX