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 index<->table 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