DataGrard异常-ORA-38868

ORA-38868

数据库alert报错，并且MRP进程无法启动，数据库同步发生了异常。

环境信息

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cnsh230249:cfods > uname -a Linux cnsh230249 2.6.18-164.9.1.el5 #1 SMP Wed Dec 9 03:27:37 EST 2009 x86_64 x86_64 x86_64 GNU/Linux cnsh230249:cfods > sqlplus '/as sysdba' SQL*Plus: Release 11.2.0.2.0 Production on Sat Jan 28 19:55:43 2012 Copyright (c) 1982, 2010, Oracle. All rights reserved. Connected to: Oracle Database 11g Enterprise Edition Release 11.2.0.2.0 - 64bit Production With the Partitioning, Real Application Clusters, Automatic Storage Management, OLAP, Data Mining and Real Application Testing options SQL>

报错内容

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Sat Jan 28 15:34:43 2012 alter database recover managed standby database parallel 64 disconnect from session Attempt to start background Managed Standby Recovery process (cfods) Sat Jan 28 15:34:43 2012 MRP0 started with pid=49, OS id=2416 MRP0: Background Managed Standby Recovery process started (cfods) started logmerger process Sat Jan 28 15:34:48 2012 大专栏  DataGrard异常-ORA-38868Managed Standby Recovery not using Real Time Apply MRP0: Background Media Recovery terminated with error 38868 Errors in file /path/app/oracle/rdbms/diag/rdbms/scfods/cfods/trace/cfods_pr00_2598.trc: ORA-38868: warning: the control file may have incorrect data file structure Slave exiting with ORA-38868 exception Errors in file /path/app/oracle/rdbms/diag/rdbms/scfods/cfods/trace/cfods_pr00_2598.trc: ORA-38868: warning: the control file may have incorrect data file structure Recovery Slave PR00 previously exited with exception 38868 MRP0: Background Media Recovery process shutdown (cfods) Completed: alter database recover managed standby database parallel 64 disconnect from session

解决方法

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1. 确认DG目前为mount状态 2. SQL> alter database open read only; 3. SQL> select open_mode from v$database;（结果为READ ONLY） 4. SQL> shutdown immediate 5. SQL> startup nomount 6. SQL> alter database mount standby database; 7. SQL> alter database recover managed standby database disconnect parallel 8; 8. SQL> select process,block# from v$managed_standby;（多次运行） 9. 通过上一步查询，看到MRP进程的BLOCK#在变化，说明已经开始apply日志了 10. 检查alert日志，发现同步正常

分析总结

虽然第一次遇到这个错误，但是不并复杂，Oracle给出了这个错误的原因及解决方法，如下：

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cnsh230249:cfods > oerr ora 38868 38868, 00000, "warning: the control file may have incorrect data file structure" // *Cause: This control file was created or converted based on a control file // from a time different from the time of the database. // *Action: Open database read-only to synchronize the control file with the // database dictionary. You can also force recovery to proceed by // invoking recovery again. cnsh230249:cfods >