世界之大无奇不有,已经记不清这是第几个客户咨询IDL_UB1$ 被truncate之后导致数据库无法启动的case了.idl_ub1$表是用来存储PL/SQL的代码单元的，包括DIANA等，IDL在这里代表Interface Definition Language. 在数据库的启动过程中通过10046跟踪可以知道,有类似:select /*+ index(idl_ub1$ i_idl_ub11) +*/ piece#,length,piece from idl_ub1$ where obj#=:1 and part=:2 and version=:3 order by piece#的查询语句,由于该表被truncate之后,导致数据库启动无法绕过该sql,而hang住无法完全open成功.下午闲着没事通过模拟,可以对该故障实现正常open,并且导出数据
模拟业务数据
create user xff identified by oracle;
grant dba to xff;
conn xff/oracle
create table t_xifenfei as select * from dba_objects;
create index i_xifenfei on t_xifenfei(object_id);
create view v_xifenfei as select * from t_xifenfei;
create or replace procedure proc1(
para1 varchar2,
para2 out varchar2,
para3 in out varchar2
) as
v_name varchar2(20);
begin
v_name :='xifenfei';
para3 := v_name;
dbms_output.put_line('para3:'||para3);
end;
/
alter system checkpoint;
创建xff账户,并且创建有代表性的表,索引,存储过程,视图等.
模拟truncate IDL_UB1$表
SQL> conn / as sysdba Connected. SQL> truncate table IDL_UB1$; truncate table IDL_UB1$ * ERROR at line 1: ORA-03113: end-of-file on communication channel Process ID: 31325 Session ID: 177 Serial number: 7
重启数据库
SQL> conn / as sysdba Connected. SQL> shutdown immediate; Database closed. Database dismounted. ORACLE instance shut down. SQL> SQL> SQL> SQL> SQL> startup ORACLE instance started. Total System Global Area 7499329536 bytes Fixed Size 2267832 bytes Variable Size 1409287496 bytes Database Buffers 6073352192 bytes Redo Buffers 14422016 bytes Database mounted.
数据库在mount之后,一直处于hang住状态,查看alert日志
Sun May 20 17:02:34 2018 Exception [type: SIGSEGV, Address not mapped to object] [ADDR:0x18] [PC:0x98D94A7, hshuid()+273] [flags: 0x0, count: 1] Errors in file /home/u01/app/oracle/diag/rdbms/test/test/trace/test_ora_31325.trc (incident=21781): ORA-07445: exception encountered: core dump [hshuid()+273] [SIGSEGV] [ADDR:0x18] [PC:0x98D94A7] [Address not mapped to object] [] Incident details in: /home/u01/app/oracle/diag/rdbms/test/test/incident/incdir_21781/test_ora_31325_i21781.trc Use ADRCI or Support Workbench to package the incident. See Note 411.1 at My Oracle Support for error and packaging details. Sun May 20 17:02:37 2018 Sweep [inc][21781]: completed Sweep [inc2][21781]: completed Sun May 20 17:02:37 2018 Dumping diagnostic data in directory=[cdmp_20180520170237], requested by (instance=1, osid=31325), summary=[incident=21781]. Sun May 20 17:02:55 2018 Exception [type: SIGSEGV, Address not mapped to object] [ADDR:0x18] [PC:0x98D94A7, hshuid()+273] [flags: 0x0, count: 1] Errors in file /home/u01/app/oracle/diag/rdbms/test/test/trace/test_m000_31373.trc (incident=21821): ORA-07445: exception encountered: core dump [hshuid()+273] [SIGSEGV] [ADDR:0x18] [PC:0x98D94A7] [Address not mapped to object] [] Incident details in: /home/u01/app/oracle/diag/rdbms/test/test/incident/incdir_21821/test_m000_31373_i21821.trc Use ADRCI or Support Workbench to package the incident. See Note 411.1 at My Oracle Support for error and packaging details. Sun May 20 17:02:56 2018 Dumping diagnostic data in directory=[cdmp_20180520170256], requested by (instance=1, osid=31373 (M000)), summary=[incident=21821].
这类问题比较明显,正常方法无法打开,通过工具分析system文件,发现虽然truncate IDL_UB1$操作报错了,但是IDL_UB1$和对应的index I_IDL_UB11 obj#,dataobj#均已经改变,而且相关对象的segment header也变化为新dataobj#(truncate之后的),也就是说truncate在数据库中的主要更改操作已经完成.现在在缺少记录的情况下,数据库执行如下sql无法获取记录,从而无法open
PARSING IN CURSOR #140342551421712 len=132 dep=2 uid=0 oct=3 lid=0 tim=1526843464635335 hv=4260389146 ad='21af73218' sqlid='cvn54b7yz0s8u' select /*+ index(idl_ub1$ i_idl_ub11) +*/ piece#,length,piece from idl_ub1$ where obj#=:1 and part=:2 and version=:3 order by piece# END OF STMT PARSE #140342551421712:c=0,e=14,p=0,cr=0,cu=0,mis=0,r=0,dep=2,og=4,plh=3246118364,tim=1526843464635335 BINDS #140342551421712: Bind#0 oacdty=02 mxl=22(22) mxlc=00 mal=00 scl=00 pre=00 oacflg=08 fl2=0001 frm=00 csi=00 siz=24 off=0 kxsbbbfp=7fa40bec7d80 bln=22 avl=03 flg=05 value=1310 Bind#1 oacdty=02 mxl=22(22) mxlc=00 mal=00 scl=00 pre=00 oacflg=08 fl2=0001 frm=00 csi=00 siz=24 off=0 kxsbbbfp=7fa40bec7d50 bln=24 avl=01 flg=05 value=0 Bind#2 oacdty=02 mxl=22(22) mxlc=00 mal=00 scl=00 pre=00 oacflg=08 fl2=0001 frm=00 csi=00 siz=24 off=0 kxsbbbfp=7fa40bec7d20 bln=24 avl=06 flg=05 value=184549376 EXEC #140342551421712:c=0,e=76,p=0,cr=0,cu=0,mis=0,r=0,dep=2,og=4,plh=3246118364,tim=1526843464635449 FETCH #140342551421712:c=0,e=4,p=0,cr=1,cu=0,mis=0,r=0,dep=2,og=4,plh=3246118364,tim=1526843464635462 STAT #140342551421712 id=1 cnt=0 pid=0 pos=1 obj=225 op='TABLE ACCESS BY INDEX ROWID IDL_UB1$ (cr=1 pr=0 pw=0 time=4 us cost=3 size=44 card=2)' STAT #140342551421712 id=2 cnt=0 pid=1 pos=1 obj=236 op='INDEX RANGE SCAN I_IDL_UB11 (cr=1 pr=0 pw=0 time=4 us cost=2 size=0 card=2)' CLOSE #140342551421712:c=0,e=2,dep=2,type=0,tim=1526843464635496
通过对数据库采用技术欺骗手段,让数据库启动相关sql能够获取到记录(和正常查询的相同),从而实现数据库正常open
SQL> startup mount ORACLE instance started. Total System Global Area 7499329536 bytes Fixed Size 2267832 bytes Variable Size 1409287496 bytes Database Buffers 6073352192 bytes Redo Buffers 14422016 bytes Database mounted. SQL> alter database open; Database altered.
open成功之后,后台报大量的ORA-08103: object no longer exists,通过分析是由于truncate IDL_UB1$没有完全成功,导致出现该错误.解决方法就是对Oracle数据字典进行人工更新,把没有完成的truncate操作在数据库中给予完成.
导出数据
exp导出数据成功
但是expdp无法执行
[oracle@bogon oradata]$ expdp '"/ as sysdba"' schemas=xff file=1.dmp Export: Release 11.2.0.4.0 - Production on Sun May 20 17:10:53 2018 Copyright (c) 1982, 2011, Oracle and/or its affiliates. All rights reserved. Connected to: Oracle Database 11g Enterprise Edition Release 11.2.0.4.0 - 64bit Production With the Partitioning, OLAP, Data Mining and Real Application Testing options UDE-31623: operation generated ORACLE error 31623 ORA-31623: a job is not attached to this session via the specified handle ORA-06512: at "SYS.DBMS_DATAPUMP", line 3326 ORA-06512: at "SYS.DBMS_DATAPUMP", line 4551 ORA-06512: at line 1
暂时未去研究对这个表进行重建,使用exp导出然后再imp导入是比较理想的办法
