修改主机名导致oracle实例无法启动暨如何修改hostname

操作系统是32位的Linux 5.1:

# cat /etc/redhat-release

# Red Hat Enterprise Linux Server release 5.1 (Tikanga)

数据库版本是10.2.0.3.0:

SQL> select * from v$version;

BANNER

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

Oracle Database 10g Enterprise Edition Release 10.2.0.3.0 - Prod

PL/SQL Release 10.2.0.3.0 - Production

CORE 10.2.0.3.0 Production

TNS for Linux: Version 10.2.0.3.0 - Production

NLSRTL Version 10.2.0.3.0 - Production

network文件内容如下：

$ cat /etc/sysconfig/network

NETWORKING=yes

NETWORKING_IPV6=no

HOSTNAME=localhost.localdomain

hosts文件内容如下：

$ cat /etc/hosts

# Do not remove the following line, or various programs

# that require network functionality will fail.

127.0.0.1 localhost.localdomain localhost

::1 localhost6.localdomain6 localhost6

在没有修改主机名的情况下一切正常，因为想要规范linux服务器的名字，欲修改Linux的hostname，但是修改后数据库无法启动，有此经验的朋友请指点，感谢ing

修改主机名我尝试了两种：

第一种.直接修改名字，不重启机器

# hostname oratest

第二种.修改network文件，重新启动机器

$ cat /etc/sysconfig/network

NETWORKING=yes

NETWORKING_IPV6=no

HOSTNAME=oratest

修改主机名之后问题现象如下：

[oracle@oratest ~]$ sqlplus / as sysdba

SQL*Plus: Release 10.2.0.3.0 - Production on Mon Jan 12 05:05:45 2009

Copyright (c) 1982, 2006, Oracle. All Rights Reserved.

Connected to an idle instance.

SQL> startup;

ORA-00600: internal error code, arguments: [keltnfy-ldmInit], [46], [1], [], [], [], [], []

[oracle@oratest ~]$ emctl start dbconsole

TZ set to PRC

Exception in getting local host

java.net.UnknownHostException: oratest: oratest

at java.net.InetAddress.getLocalHost(InetAddress.java:1191)

at oracle.sysman.emSDK.conf.TargetInstaller.getLocalHost(TargetInstaller.java:5488)

at oracle.sysman.emSDK.conf.TargetInstaller.main(TargetInstaller.java:4102)

Exception in getting local host

java.net.UnknownHostException: oratest: oratest

at java.net.InetAddress.getLocalHost(InetAddress.java:1191)

at oracle.sysman.emSDK.conf.TargetInstaller.getLocalHost(TargetInstaller.java:5488)

at oracle.sysman.emSDK.conf.TargetInstaller.main(TargetInstaller.java:4102)

OC4J Configuration issue. /oracle/u01/app/oracle/product/10.2.0/db_1/oc4j/j2ee/OC4J_DBConsole_null_ora10g not found.