delete from B2BADMIN.DELIVERYJOB where DOCID
in(SELECT DOCID from B2BADMIN.BIZDOC where doctimestamp< sysdate -26) ； 
Error at line 8
ORA-08102: index key not found, obj# 56687, file 54, block 176049 (2)

在删除表上的历史数据时发现index数据块方面的错误，

mxb2bcoredb01<*wmb2bprd1*/home/oracle>$oerr   ora   8102   
08102, 00000, "index key not found, obj# %s, file %s, block %s (%s)"
// *Cause:  Internal error: possible inconsistency in index
// *Action:  Send trace file to your customer support representative, along
//           with information on reproducing the error

重建index 后恢复正常， alter index  xxxx   rebuild online  ;  

如果需要查看到底时候什么不一致，可以经过analyze table t   validate structure cascade;   验证表和索引的完整性。在udump产生一个trace文件。

　　*** SESSION ID:(570.35812) 2006-01-01 10:49:34.095
　　row not found in index tsn: 37 rdba: 0xfe037009
.......