RAC下主机修改时区导致db无法open怎么办
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11.2.0.4.rac 主机修改时区导致db无法open
os:redhat linux
db:11.2.0.4 rac
desc:crs启动后，除db外都可以正常启动。
查看crs和db的log，文件最后修改时间跟主机时间一致，但log里的时间不一致，如下为crs和dblog里的日志
crs log
==========================================
2015-05-04 10:30:24.139:
[client(19430)]CRS-4743:File /u02/app/11.2.0/grid/oc4j/j2ee/home/OC4J_DBWLM_config/system-jazn-data.xml was updated from OCR(Size: 13365(New), 13378(Old) bytes)
2015-05-04 10:31:33.583:
[cssd(18287)]CRS-1601:CSSD Reconfiguration complete. Active nodes are gzsjdb1 gzsjdb2 .
2015-05-04 10:31:56.583:
[crsd(19096)]CRS-2772:Server 'gzsjdb2' has been assigned to pool 'Generic'.
2015-05-04 10:31:56.584:
[crsd(19096)]CRS-2772:Server 'gzsjdb2' has been assigned to pool 'ora.jzxn'. #出问题时日志
2015-05-04 16:31:02.619: #问题解决后的日志
[client(26295)]CRS-10051:CVU found following errors with Clusterware setup : PRVF-7573 : Sufficient swap size is not available on node "gzsjdb1" [Required = 16GB (1.6777216E7KB) ; Found = 10GB (1.0485752E7KB)]
PRVF-5415 : Check to see if NTP daemon or service is running failed
PRVG-1101 : SCAN name "scan-cl
db log
============================
Fri Jun 12 03:45:16 2015 #出问题时日志
Thread 1 advanced to log sequence 54 (LGWR switch)
Current log# 3 seq# 54 mem# 0: /oradata/oradata/jzxn/redo03.log
Fri Jun 12 03:47:38 2015
Thread 1 cannot allocate new log, sequence 55
Checkpoint not complete
Current log# 3 seq# 54 mem# 0: /oradata/oradata/jzxn/redo03.log
Fri Jun 12 03:47:43 2015
opidcl aborting process unknown ospid (29020) as a result of ORA-28
Fri Jun 12 05:13:24 2015
Thread 1 advanced to log sequence 55 (LGWR switch)
Current log# 1 seq# 55 mem# 0: /oradata/oradata/jzxn/redo01.log
Fri Jun 12 14:31:04 2015 #问题解决后的日志
Starting ORACLE instance (normal)
************************ Large Pages Information *******************
Per process system memlock (soft) limit = UNLIMITED
Total Shared Global Region in Large Pages = 0 KB (0%)
解决过程：起初没有注意这个时间问题，对crs重启后，仍然是db的资源不正常，后发现日志时间不对，经询问项目组节点2由默认时间(Etc/GMT-1)改为东8区(Asia/Shanghai)的时区后，节点2就无法连接db，节点1修改时区后仍可连接。直至今天节点1也无法连接db.
出现db日志、crs日志等和主机时间不一致，是因为在rac新颁布中，grid也有属于自己的时区，在安装过程中，默认值与操作系统的TZ环境变量相同。
本例是因为时间不一致，导致db无法open，修改grid时区后，重启crs，db可以正常open.
1.查看系统时区
$cat /etc/sysconfig/clock
ZONE=Asia/Shanghai
2.查看crs里配置的时区
[root@gzsjdb1 install]# cat s_crsconfig_gzsjdb1_env.txt.bak
### This file can be used to modify the NLS_LANG environment variable, which determines the charset to be used for messages.
### For example, a new charset can be configured by setting NLS_LANG=JAPANESE_JAPAN.UTF8
### Do not modify this file except to change NLS_LANG, or under the direction of Oracle Support Services
TZ=Etc/GMT-1 #仍然为默认的美国时区
NLS_LANG=AMERICAN_AMERICA.AL32UTF8
TNS_ADMIN=
ORACLE_BASE=
3.修改crs的时区为Asia/Shanghai
[root@gzsjdb1 install]# cat s_crsconfig_gzsjdb1_env.txt
### This file can be used to modify the NLS_LANG environment variable, which determines the charset to be used for messages.
### For example, a new charset can be configured by setting NLS_LANG=JAPANESE_JAPAN.UTF8
### Do not modify this file except to change NLS_LANG, or under the direction of Oracle Support Services
TZ=Asia/Shanghai
NLS_LANG=AMERICAN_AMERICA.AL32UTF8
TNS_ADMIN=
ORACLE_BASE=
[root@gzsjdb1 install]# pwd
/u02/app/11.2.0/grid/crs/install
[root@gzsjdb1 install]#
4.重启crs
5.经验证crs日志，db日志等都与主机保持一致，通过plsqldev可以登录数据库。
[root@gzsjdb2 ~]# date
Fri Jun 12 15:12:58 CST 2015
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