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

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,另一个节点启动不了。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。 错误信息: ORA-01102: cannot mount database in EXCLUSIVE mode 解决方法: rac1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  830930944 bytes Fixed Size                  2257800 bytes Variable Size            566234232 bytes Database Buffers          260046848 bytes Redo Buffers                2392064 bytes Database mounted. Database opened. SQL> select open_mode from v$database; OPEN_MODE -------------------- READ WRITE SQL> show parameter cluster_database; NAME                                TYPE        VALUE ------------------------------------ ----------- ------------------------------ cluster_database                    boolean    TRUE cluster_database_instances          integer    2 SQL> rac2节点: [oracle@rac2 ~]$ sqlplus / as sysdba SQL*Plus: Release 11.2.0.4.0 Production on Thu Sep 29 10:14:16 2016 Copyright (c) 1982, 2013, Oracle.  All rights reserved. Connected to an idle instance. SQL> startup ORA-01102: cannot mount database in EXCLUSIVE mode  --没有修改参数前报错,修改后启动成功 SQL> startup ORACLE instance started. Total System Global Area  830930944 bytes Fixed Size                  2257800 bytes Variable Size            599788664 bytes Database Buffers          226492416 bytes Redo Buffers                2392064 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>