下。 今天将服务器的监听程序重启了一下，重启后成功，但是数据库死活注册不上去，导致客户端没法连接到数据库： <span style="font-family: Arial,
Instance "orcl",status UNKNowN,has 1 handler(s) for this service...，有需要的朋友可以参考下。
@H_
674_16@
今天将服务器的监听程序重启了一下，重启后成功，但是数据库死活注册不上去，导致客户端没法连接到数据库：
@H_
674_16@
@H_674_16@
<span style="font-family: Arial,Helvetica,sans-serif;">-- 启动监听
[Oracle@localhost dbs]$ lsnrctl start</span>
LSNRCTL for Linux: Version 11.2.0.3.0 - Production on 04-FEB-2015 13:43:40
Copyright (C) 1991,2011,Oracle. All rights reserved.
TNS-01106: Listener using listener name LISTENER has already been started
[Oracle@localhost dbs]$ lsnrctl status
LSNRCTL for Linux: Version 11.2.0.3.0 - Production on 04-FEB-2015 13:43:45
Copyright (C) 1991,Oracle. All rights reserved.
ConnecTing to (DESCRIPTION=(ADDRESS=(PROTOCOL=IPC)(KEY=EXTPROC1521)))
STATUS of the LISTENER
------------------------
Alias LISTENER
Version TNSLSNR for Linux: Version 11.2.0.3.0 - Production
Start Date 04-FEB-2015 13:43:21
Uptime 0 days 0 hr. 0 min. 23 sec
Trace Level off
Security ON: Local OS Authentication
SNMP OFF
Listener Parameter File /u01/app/Oracle/network/admin/listener.ora
Listener Log File /u01/app/diag/tnslsnr/localhost/listener/alert/log.xml
Listening Endpoints SumMary...
(DESCRIPTION=(ADDRESS=(PROTOCOL=ipC)(KEY=EXTPROC1521)))
(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=192.168.3.100)(PORT=1521)))
services SumMary...
service "CLRExtProc" has 1 instance(s).
Instance "CLRExtProc",has 1 handler(s) for this service...
service "orcl" has 1 instance(s).
Instance "orcl",has 1 handler(s) for this service...
The command completed successfully
启动后，提示
Instance "orcl",has 1 handler(s) for this service...
这个提示一般认为很正常，是由于实例没有注册到监听服务中去，于是注册实例
sql> alter sy
stem register;
Sy
stem altered.
@H_
674_16@
实例已经注册，再来看看监听状态：
[
Oracle@localhost dbs]$
lsnrctl start
LSNRCTL for Linux: Version 11.2.0.3.0 - Production on 04-FEB-2015 13
:43
:40
Copyright (
C) 1991,has 1 handler(s) for this
service...
The command completed
successfully
@H_
674_16@发现orcl 还是未知状态（
），查看监听配置是否有问题
--监听
文件的
内容
[
Oracle@localhost admin]$ pwd
/u01/app/
Oracle/network/admin
[
Oracle@localhost admin]$ more
listener.ora
#
listener.ora Network Con
figuration File: /u01/app/
Oracle/network/admin/
listener.ora
# Generated by
Oracle con
figuration tool
s.
SID_LIST_LISTENER =
(SID_LIST =
(SID_DESC =
(SID_NAME = CLRExtPro
C)
(
OracLE_HOME = /u01/app/
Oracl
E)
(PROGRAM = extpro
C)
)
(SID_DESC =
(GLOBAL_
dbname = orcl)
(
OracLE_HOME = /u01/app/
Oracl
E)
(SID_NAME = orcl)
)
)
LISTENER =
(DESCRIPTION_LIST =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = IP
C)(KEY = EXTPROC1521))
(ADDRESS = (PROTOCOL = TC
p)(HOST =192.168.3.100)(PORT = 1521))
)
)
ADR_BASE_LISTENER = /u01/app
@H_
674_16@监听
文件貌似
没有问题，因为我之前是
没有问题，看看前面监听的日志：
[
Oracle@localhost admin]$ tail -30 /u01/app/diag/tnslsnr/localhost/listener/alert/log.xml
<msg time='2015-02-04T13
:43:21.139+08:00'
ORG_ID='
Oracle' comp_id='tnslsnr'
type='UNK
NowN' level='16' host_id='localhost.localdomain'
host_addr=':
:1'>
<txt>WARNING: Subscription for node down event still pending
</txt>
</msg>
<msg time='2015-02-04T13
:43:21.140+08:00'
ORG_ID='
Oracle' comp_id='tnslsnr'
type='UNK
NowN' level='16' host_id='localhost.localdomain'
host_addr=':
:1'>
<txt>04-FEB-2015 13
:43:21 * (CONNECT_DATA=(CID=(PROGRAM=)(HOST=localhost.localdomain)(USER=
Oracl
E))(COMMAND=status)(ARGUMENTS=64)(
serviCE=LISTENER)(VERSION=186647296)) * status * 0
</txt>
</msg>
<msg time='2015-02-04T13
:43
:40.091+08:00'
ORG_ID='
Oracle' comp_id='tnslsnr'
type='UNK
NowN' level='16' host_id='localhost.localdomain'
host_addr=':
:1'>
<txt>04-FEB-2015 13
:43
:40 * ping * 0
</txt>
</msg>
<msg time='2015-02-04T13
:43
:45.083+08:00'
ORG_ID='
Oracle' comp_id='tnslsnr'
type='UNK
NowN' level='16' host_id='localhost.localdomain'
host_addr=':
:1'>
<txt>WARNING: Subscription for node down event still pending
</txt>
</msg>
<msg time='2015-02-04T13
:43
:45.084+08:00'
ORG_ID='
Oracle' comp_id='tnslsnr'
type='UNK
NowN' level='16' host_id='localhost.localdomain'
host_addr=':
:1'>
<txt>04-FEB-2015 13
:43
:45 * (CONNECT_DATA=(CID=(PROGRAM=)(HOST=localhost.localdomain)(USER=
Oracl
E))(COMMAND=status)(ARGUMENTS=64)(
serviCE=LISTENER)(VERSION=186647296)) * status * 0
</txt>
发现监听在启动时，读取了主机名：
localhost.localdomain
，个人感觉应该是主机名解析有问题，于是看看hosts文件
[root@localhost
Oracle]# hostname
localhost.localdomain
[root@localhost
Oracle]# more /etc/hosts
127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4
:
:1 localhost localhost.localdomain localhost6 localhost6.localdomain6
192.168.3.100 localhost.localdomain
发现三个IP都对应了机器名localhost.localdomain ，可能这种情况导致监听无法解析导致数据库不能注册到监听程序中
[root@localhost
Oracle]# more /etc/hosts
#127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4
172.0.0.1 localhost
192.168.3.100 localhost.localdomain
#:
:1 localhost localhost.localdomain localhost6 localhost6.localdomain6
@H_
674_16@然后
再重启监听程序
[
Oracle@localhost dbs]$ lsnrctl
LSNRCTL for Linux: Version 11.2.0.3.0 - Production on 04-FEB-2015 15
:10
:10
Copyright (
C) 1991,
Oracle. All rights reserved.
Welcome to LSNRCTL,type "
Help" for information.
LSNRCTL> stop
Connec
Ting to (DESCRIPTION=(ADDRESS=(PROTOCOL=IP
C)(KEY=EXTPROC1521)))
The command completed
successfully
LSNRCTL> start
Star
Ting /u01/app/
Oracle/bin/tnslsnr: please wait...
TNSLSNR for Linux: Version 11.2.0.3.0 - Production
Sy
stem parameter file is /u01/app/
Oracle/network/admin/
listener.ora
Log
messages written to /u01/app/diag/tnslsnr/localhost/listener/alert/log.xml
Listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=ip
C)(KEY=EXTPROC1521)))
Listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=tc
p)(HOST=192.168.3.100)(PORT=1521)))
Connec
Ting to (DESCRIPTION=(ADDRESS=(PROTOCOL=IP
C)(KEY=EXTPROC1521)))
STATUS of the LISTENER
------------------------
Alias LISTENER
Version TNSLSNR for Linux: Version 11.2.0.3.0 - Production
Start Date 04-FEB-2015 15
:10:29
Uptime 0 days 0 hr. 0 min. 0 sec
Trace Level off
S
ecurity ON: Local OS Authentication
SNMP OFF
Listener Parameter File /u01/app/
Oracle/network/admin/
listener.ora
Listener Log File /u01/app/diag/tnslsnr/localhost/listener/alert/log.xml
Listening Endpoints Sum
Mary...
(DESCRIPTION=(ADDRESS=(PROTOCOL=ip
C)(KEY=EXTPROC1521)))
(DESCRIPTION=(ADDRESS=(PROTOCOL=tc
p)(HOST=192.168.3.100)(PORT=1521)))
services Sum
Mary...
service "CLRExtProc" has 1 instance(s).
Instance "CLRExtProc",has 1 handler(s) for this
service...
The command completed
successfully
LSNRCTL>
@H_
674_16@ 实例
注册后，再看看监听状态
LSNRCTL> status
Connec
Ting to (DESCRIPTION=(ADDRESS=(PROTOCOL=IP
C)(KEY=EXTPROC1521)))
STATUS of the LISTENER
------------------------
Alias LISTENER
Version TNSLSNR for Linux: Version 11.2.0.3.0 - Production
Start Date 04-FEB-2015 15
:10:29
Uptime 0 days 0 hr. 1 min. 29 sec
Trace Level off
S
ecurity ON: Local OS Authentication
SNMP OFF
Listener Parameter File /u01/app/
Oracle/network/admin/
listener.ora
Listener Log File /u01/app/diag/tnslsnr/localhost/listener/alert/log.xml
Listening Endpoints Sum
Mary...
(DESCRIPTION=(ADDRESS=(PROTOCOL=ip
C)(KEY=EXTPROC1521)))
(DESCRIPTION=(ADDRESS=(PROTOCOL=tc
p)(HOST=192.168.3.100)(PORT=1521)))
services Sum
Mary...
service "CLRExtProc" has 1 instance(s).
Instance "CLRExtProc",has 1 handler(s) for this
service...
service "orc
l.localdomain" has 1 instance(s).
Instance "orcl",status READY,has 1 handler(s) for this
service...
service "orcl11gXDB.localdomain" has 1 instance(s).
Instance "orcl",sans-serif; font-size
:14px"> 发现实例已经处于ready状态了。
@H_674_16@ OK，到此，客户端已经可以连接到数据库了
