记一次Oracle监听无法动态注册处理
在之前的文章中http://itspace.iteye.com/blog/1055532探讨过监听无法动态注册的问题，这一次又在不同的客户中碰到了相同的问题，遂记录之。
客户反映他的数据库无法动态注册监听，监听状态显示如下
Instance "PLSExtProc", status UNKNOWN, has 1 handler(s) for this service...
Service "wesrmirr" has 1 instance(s).
Instance "wesrmirr", status UNKNOWN, has 1 handler(s) for this service...
The command completed successfully
可以看到监听端口为1521，而且local_listner参数为空，
引用SQL> show parameter local
NAME TYPE VALUE
------------------------------------ ----------- ------------------------------
local_listener string
log_archive_local_first boolean TRUE
在这种情况下，理论上pmon会将实例状态动态注册至监听中。
手动发起监听注册，也没有作用，监听状态依旧。
引用SQL> alter system register;
System altered.
于是检查数据库检查日志，在启动日志出现无效地址字样
引用PMON started with pid=3, OS id=2521
Fri Jun 10 16:33:25 2011
ORA-00130: invalid listener address '(ADDRESS=(PROTOCOL=TCP)(HOST=unknown)(PORT=1521))'
PSP0 started with pid=2, OS id=2526
进一步检查listener.ora文件和/etc/hosts文件
引用SID_LIST_LISTENER =
(SID_LIST =
(SID_DESC =
(SID_NAME = PLSExtProc)
(ORACLE_HOME = /oracle/app/product/10.2)
(PROGRAM = extproc)
)
(SID_DESC =
(GLOBAL_DBNAME = wesrmirr)
(ORACLE_HOME = /oracle/app/product/10.2)
(SID_NAME = wesrmirr)
)
)
LISTENER =
(DESCRIPTION_LIST =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = 130.123.12.89)(PORT = 1521))
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC0))
)
)
可以看到ip地址130.123.12.89并没有出现在/etc/hosts配置文件中
引用$ more /etc/hosts
# @(#)B11.23_LRhosts $Revision: 1.9.214.1 $ $Date: 96/10/08 13:20:01 $
#
# The form for each entry is:
# <internet address> <official hostname> <aliases>
#
# For example:
# 192.1.2.34 hpfcrm loghost
#
# See the hosts(4) manual page for more information.
# Note: The entries cannot be preceded by a space.
# The format described in this file is the correct format.
# The original Berkeley manual page contains an error in
# the format description.
#
127.0.0.1 localhost loopback
130.123.12.2 wesr-S-YWMIRROR
找到原因之后，解决方法也变得很简单，只要将130.123.12.89添加至/etc/hosts，再执行手动注册监听即可。
