ORA-00600: internal error code

Cause: It may happen  the error was in undo corruption.

Resolve:

Step 1:
SQL> SELECT name,value FROM v$parameter WHERE name IN ('undo_management','undo_tablespace');

NAME VALUE
-------------------- --------------------
undo_management MANUAL
undo_tablespace UNDO_TBS

Step2:
SQL> select FILE_NAME, TABLESPACE_NAME from dba_data_files where TABLESPACE_NAME like 'UNDO%';

FILE_NAME                         TABLESPACE_NAME
----------------------------------------------------------------
/ebiz/oracle/db/apps_st/data/undotbs_02.dbf     UNDO_TBS
/ebiz/oracle/db/apps_st/data/undotbs_01.dbf     UNDO_TBS

Step 3: Create a new undo tablespace
SQL> create UNDO tablespace UNDOTBS datafile '/ebiz/oracle/db/apps_st/data/undotbs01.dbf' size 1024m REUSE AUTOEXTEND ON NEXT 4096K MAXSIZE 1024M;
Tablespace created.

Step 4:
SQL> ALTER SYSTEM SET undo_tablespace = 'UNDOTBS' scope=spfile;
System altered.

Step 5: set old undo tablespace offine mode and drop
SQL> ALTER TABLESPACE UNDO_TBS offline;
Tablespace altered.

SQL> drop tablespace UNDO_TBS including contents and datafiles;
Tablespace dropped.

Step 6:
Rebounced the db services

Step 7: Changed the undo management parameter to AUTO
SQL> alter system set undo_management='AUTO' scope=spfile;
System altered.

SQL> SELECT name,value FROM v$parameter WHERE name IN ('undo_management','undo_tablespace');

NAME VALUE
-------------------- --------------------
undo_management AUTO
undo_tablespace UNDOTBS