因v$archived_log视图记录异常导致dg MRP进程异常

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标题：因v$archived_log视图记录异常导致dg MRP进程异常

作者：惜分飞©版权所有[未经本人同意,不得以任何形式转载,否则有进一步追究法律责任的权利.]

版本信息

操作系统Linux 4.8 x86
数据库版本ORACLE 9.2.0.4

alert日志报错
MRP进程出现异常报ORA-00310/ORA-00334错误

…………
Media Recovery Log /u01/oracle/oradata/lunar/arch/1_75.dbf
Media Recovery Log /u01/oracle/oradata/lunar/arch/1_76.dbf
Media Recovery Log /u01/oracle/oradata/lunar/arch/1_77.dbf
Media Recovery Log /u01/oracle/oradata/lunar/arch/1_78.dbf
Media Recovery Log /u01/oracle/oradata/xifenfei/redo02.log
MRP0: Background Media Recovery terminated with error 310
Thu Nov  8 07:44:39 2012
Errors in file /u01/oracle/admin/lunar/bdump/lunar_mrp0_25625.trc:
ORA-00310: archived log contains sequence 85; sequence 79 required
ORA-00334: archived log: '/u01/oracle/oradata/xifenfei/redo02.log'
Recovery interrupted.
MRP0: Background Media Recovery process shutdown

trace文件

*** SESSION ID:(17.13) 2012-11-08 07:24:12.986
Background Managed Standby Recovery process started
*** 2012-11-08 07:24:18.023
Managed Recovery: Active posted.
*** 2012-11-08 07:41:03.171
Media Recovery Log /u01/oracle/oradata/lunar/arch/1_64.dbf
Media Recovery Log /u01/oracle/oradata/lunar/arch/1_65.dbf
Media Recovery Log /u01/oracle/oradata/lunar/arch/1_66.dbf
Media Recovery Log /u01/oracle/oradata/lunar/arch/1_67.dbf
Media Recovery Log /u01/oracle/oradata/lunar/arch/1_68.dbf
Media Recovery Log /u01/oracle/oradata/lunar/arch/1_69.dbf
Media Recovery Log /u01/oracle/oradata/lunar/arch/1_70.dbf
Media Recovery Log /u01/oracle/oradata/lunar/arch/1_71.dbf
Media Recovery Log /u01/oracle/oradata/lunar/arch/1_72.dbf
Media Recovery Log /u01/oracle/oradata/lunar/arch/1_73.dbf
Media Recovery Log /u01/oracle/oradata/lunar/arch/1_74.dbf
Media Recovery Log /u01/oracle/oradata/lunar/arch/1_75.dbf
Media Recovery Log /u01/oracle/oradata/lunar/arch/1_76.dbf
*** 2012-11-08 07:41:39.083
Media Recovery Log /u01/oracle/oradata/lunar/arch/1_77.dbf
*** 2012-11-08 07:44:39.171
Media Recovery Log /u01/oracle/oradata/lunar/arch/1_78.dbf
Media Recovery Log /u01/oracle/oradata/xifenfei/redo02.log
Background Media Recovery terminated with error 310
ORA-00310: archived log contains sequence 85; sequence 79 required
ORA-00334: archived log: '/u01/oracle/oradata/xifenfei/redo02.log'
----- Redo read statistics for thread 1 -----
Read rate (ASYNC): 21990Kb in 1221.38s => 0.02 Mb/sec
Longest record: 1Kb, moves: 0/92129 (0%)
Change moves: 34869/213735 (16%), moved: 2Mb
----------------------------------------------
*** 2012-11-08 07:44:39.404
Managed Recovery: Not Active posted.
Background Media Recovery process shutdown
*** 2012-11-08 07:44:39.406

猜想数据库恢复需要sequence为79的归档日志，但是该归档日志对应的为文件为redo02.log,而该redo02的seq为85所以使得MRP进程异常

使用rman尝试恢复

RMAN> recover database ;
Starting recover at 08-NOV-12
using target database controlfile instead of recovery catalog
allocated channel: ORA_DISK_1
channel ORA_DISK_1: sid=8 devtype=DISK
starting media recovery
unable to find archive log
archive log thread=1 sequence=79
RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-03002: failure of recover command at 11/08/2012 08:12:48
RMAN-06054: media recovery requesting unknown log: thread 1 scn 12286829427051

测试证明rman也无法正常的恢复该异常问题

验证猜想

SQL> select name from v$archived_log where SEQUENCE#=79;
NAME
-------------------------------------------------------------------
/u01/oracle/oradata/lunar/arch/1_79.dbf
/u01/oracle/oradata/xifenfei/redo02.log
/u01/oracle/oradata/lunar/arch/1_79.dbf
SQL> select dest_id,name from v$archived_log where SEQUENCE#=79;
   DEST_ID  NAME
----------  ---------------------------------------------------
         2  /u01/oracle/oradata/lunar/arch/1_79.dbf
         1  /u01/oracle/oradata/xifenfei/redo02.log
         1  /u01/oracle/oradata/lunar/arch/1_79.dbf
SQL> select sequence#,group# from v$log;
 SEQUENCE#     GROUP#
---------- ----------
        86          1
        85          2
        87          3
SQL> select member from v$logfile where group#=2;
MEMBER
---------------------------------------------------------------
/u01/oracle/oradata/xifenfei/redo02.log

通过查询上面相关视图，证实了猜想是因为redo log被注册进入了v$archived_log导致该故障,解决该问题的思路是把redo log file从备库控制文件的v$archived_log视图中拿掉.具体方法是：
1.如果主库正常，那直接生成standby controlfile来实现
2.如果主库也是相同情况,那么先重建主库控制文件,然后重建standby controlfile来实现(该方法需要维护窗口)

解决问题思路

--查询主库,确定主库正常
SQL> select name from v$archived_log where SEQUENCE#=79;
NAME
------------------------------------------------------------
/u01/oracle/oradata/xifenfei/archive/1_79.dbf
lunar
--重新创建standby controlfile
###############################################################
注:如果主库和备库的数据文件路径不完全一致,
建议通过设置db_file_name_convert来直接实现备库数据文件路径的转换，
而不建议通过alter database rename file来实现重命名
###############################################################
SQL> ALTER DATABASE CREATE STANDBY CONTROLFILE AS
   2 '/u01/oracle/oradata/lunar/control01.ctl' reuse;
Database altered.
--重新启动备库
SQL> startup nomount;
ORACLE instance started.
Total System Global Area  353441008 bytes
Fixed Size                   451824 bytes
Variable Size             184549376 bytes
Database Buffers          167772160 bytes
Redo Buffers                 667648 bytes
SQL> alter database mount standby database;
Database altered.
--开启日志应用
SQL> alter database recover managed standby database disconnect from session;
Database altered.
--alert日志
Thu Nov  8 08:28:16 2012
Completed: alter database recover managed standby database di
Thu Nov  8 08:28:20 2012
Restarting dead background process QMN0
QMN0 started with pid=13
Thu Nov  8 08:29:45 2012
Fetching gap sequence for thread 1, gap sequence 79-87
Trying FAL server: xifenfei
Media Recovery Log /u01/oracle/oradata/lunar/arch/1_79.dbf
Media Recovery Log /u01/oracle/oradata/lunar/arch/1_80.dbf
Media Recovery Log /u01/oracle/oradata/lunar/arch/1_81.dbf
Media Recovery Log /u01/oracle/oradata/lunar/arch/1_82.dbf
Media Recovery Log /u01/oracle/oradata/lunar/arch/1_83.dbf
Media Recovery Log /u01/oracle/oradata/lunar/arch/1_84.dbf
Media Recovery Log /u01/oracle/oradata/lunar/arch/1_85.dbf
Media Recovery Log /u01/oracle/oradata/lunar/arch/1_86.dbf
Media Recovery Log /u01/oracle/oradata/lunar/arch/1_87.dbf
Media Recovery Log /u01/oracle/oradata/lunar/arch/1_88.dbf
Media Recovery Waiting for thread 1 seq# 89

One thought on “因v$archived_log视图记录异常导致dg MRP进程异常”

  1. 可以尝试在rman中使用
    delete archivelog logseq 79;删除79号归档日志
    然后在sqlplus中使用
    ALTER DATABASE REGISTER LOGFILE ‘1_79.dbf’;
    来注册归档日志

    回复

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