解决rac错误 ORA-01102: cannot mount database in EXCLUSIVE mo

启动 Oracle ?11g RAC数据库时出现以下错误。只能启动其中一个节点（rac01）,另一个节点启动不了（rac02）。可能是以前修改cluster_database这个参数引起的。在Oracle RAC架构这个参数必须设置为TRUE。

执行startup时候，错误信息: ORA-01102: cannot mount database in EXCLUSIVE mode

解决方法:

rac01节点:

SQL> show parameter cluster_database;

NAME?????????????????????????????????? ???????? ?TYPE???????? ?VALUE

------------------------------------?????? ???? -----------???? ?------------------------------

cluster_database????????????????????????? ??boolean??? ? FALSE??

cluster_database_instances?????????? integer?????? ?1

SQL> alter system set cluster_database=true scope=spfile;

System altered.

SQL>? shutdown immediate

Database closed.

Database dismounted.

ORACLE instance shut down.

SQL> startup

ORACLE instance started.

Total System Global Area 1068937216 bytes

Fixed Size????????????????? 2260088 bytes

Variable Size???????????? 734004104 bytes

Database Buffers????????? 327155712 bytes

Redo Buffers??????????????? 5517312 bytes

Database mounted.

Database opened.

SQL> select open_mode from v$database;

OPEN_MODE?

--------------------

READ WRITE

SQL> show parameter cluster_database;

NAME??????????????????????????????????????????? TYPE??????? VALUE

------------------------------------?????????? -----------??? ------------------------------

cluster_database????????????????????????? ?boolean???? TRUE

cluster_database_instances?????????? integer????? 2

SQL>

rac02节点:

[[email?protected] ~]$ sqlplus / as sysdba

SQL*Plus: Release 11.2.0.4.0 Production on Tue May 21 23:08:16 2019

Copyright (c) 1982,2013,Oracle.? All rights reserved.

Connected to an idle instance.

SQL> startup ORACLE instance started.

Total System Global Area 1068937216 bytes

Fixed Size????????????????? 2260088 bytes

Variable Size???????????? 734004104 bytes

Database Buffers????????? 327155712 bytes

Redo Buffers??????????????? 5517312 bytes

Database mounted.

Database opened.

SQL> show parameter cluster_database;

NAME???????????????????????????????? TYPE??????? VALUE

------------------------------------ ----------- ------------------------------

cluster_database???????????????????? boolean???? TRUE

cluster_database_instances?????????? integer???? 2

SQL>

SQL> archive log list;

Database log mode????????????? Archive Mode

Automatic archival???????????? Enabled

Archive destination??????????? /u01/app/oracle/product/11.2.0.4/db_1/dbs/arch

Oldest online log sequence???? 12

Next log sequence to archive?? 13

Current log sequence???????????? ? 13

SQL>

?出自：http://blog.itpub.net/31562900/viewspace-2564139