5点多的时候还在睡梦里被人吵醒，说是数据库连不上了。晕菜。

跑过来一看。连上服务器conn / as sysdba可以登陆。用另一台机器以客户端连进去：

[oracle@smsgw admin]$ tnsping primary

TNS Ping Utility for Linux: Version 9.2.0.4.0 - Production on 26-NOV-2006 07:06:25

Used parameter files:

Used TNSNAMES adapter to resolve the alias
Attempting to contact (DESCRIPTION = (ADDRESS_LIST = (ADDRESS = (PROTOCOL = TCP)(HOST = *****)(PORT = 1521))) (CONNECT_DATA = (SID = smsnew)))
TNS-12541: TNS:no listener

果然，报TNS-12541: TNS:no listener错。

登陆服务器，查看listener的状态。
[oracle@localhost ~]$ lsnrctl status

LSNRCTL for Linux: Version 9.2.0.7.0 - Production on 26-NOV-2006 06:58:25

Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=localhost.localdomain)(PORT=1521)))
TNS-12541: TNS:no listener
TNS-12560: TNS:protocol adapter error
TNS-00511: No listener
Linux Error: 111: Connection refused
Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=IPC)(KEY=EXTPROC)))
TNS-12541: TNS:no listener
TNS-12560: TNS:protocol adapter error
TNS-00511: No listener
Linux Error: 111: Connection refused
启动listener 看看：

[oracle@localhost ~]$ lsnrctl start

LSNRCTL for Linux: Version 9.2.0.7.0 - Production on 26-NOV-2006 06:58:10

Starting /data/oracle/product/9.2.0/bin/tnslsnr: please wait...

TNS-12547: TNS:lost contact
TNS-12560: TNS:protocol adapter error
TNS-00517: Lost contact
Linux Error: 32: Broken pipe

竟然报这样的错误，以前可是没有遇到过，本来以为手到擒来的事，看来是遇上点麻烦了。

开始以为是网片坏了，但是用这台机的网卡可以ping 通别的服务器，这就将网卡坏的可能性给排除了。

没办法了，baidu一下吧。简索Linux Error: 32: Broken pipe 找到原因，原来是listener.log超出2G了，以前只是听说过这个错误，没想到竟然被碰上了，晕。

[oracle@localhost log]$ pwd
/data/oracle/product/9.2.0/network/log
[oracle@localhost log]$ du -sh *
4.0K    dbsnmp.nohup
4.0K    listenerdb.log
2.1G    listener.log
4.0K    sqlnet.log
4.0K    start.log
4.0K    status.log
4.0K    stop.log
0       z
[oracle@localhost log]$ mv listener.log listener.log.bak
[oracle@localhost log]$ cat /dev/null > listener.log
[oracle@localhost log]$ ls -l
total 2099228
-rw-r--r-- 1 oracle oinstall        813 Mar 1 2006 dbsnmp.nohup
-rw-r--r-- 1 oracle oinstall       1880 Sep 22 10:34 listenerdb.log
-rw-r--r-- 1 oracle oinstall          0 Nov 26 07:09 listener.log
-rw-r--r-- 1 oracle oinstall 2147483647 Nov 26 04:27 listener.log.bak
-rw-r--r-- 1 oracle oinstall       3098 Nov 26 06:55 sqlnet.log
-rw-r--r-- 1 oracle oinstall        484 Aug 20 10:29 start.log
-rw-r--r-- 1 oracle oinstall        976 Mar 1 2006 status.log
-rw-r--r-- 1 oracle oinstall       1927 Aug 20 10:29 stop.log
-rw-r--r-- 1 oracle oinstall          0 Feb 18 2004 z

再次重起listener。

[oracle@localhost ~]$ lsnrctl

LSNRCTL for Linux: Version 9.2.0.7.0 - Production on 26-NOV-2006 07:10:10

Welcome to LSNRCTL, type "help" for information.

LSNRCTL> stop
Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=localhost.localdomain)(PORT=1521)))
TNS-12541: TNS:no listener
TNS-12560: TNS:protocol adapter error
TNS-00511: No listener
Linux Error: 111: Connection refused
Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=IPC)(KEY=EXTPROC)))
TNS-12541: TNS:no listener
TNS-12560: TNS:protocol adapter error
TNS-00511: No listener
Linux Error: 111: Connection refused
LSNRCTL> start
Starting /data/oracle/product/9.2.0/bin/tnslsnr: please wait...

TNSLSNR for Linux: Version 9.2.0.7.0 - Production
System parameter file is /data/oracle/product/9.2.0/network/admin/listener.ora
Log messages written to /data/oracle/product/9.2.0/network/log/listener.log
Listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=localhost.localdomain)(PORT=1521)))
Listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=EXTPROC)))

Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=localhost.localdomain)(PORT=1521)))
STATUS of the LISTENER
------------------------
Alias                     LISTENER
Version                   TNSLSNR for Linux: Version 9.2.0.7.0 - Production
Start Date                26-NOV-2006 07:10:16
Uptime                    0 days 0 hr. 0 min. 6 sec
Trace Level               off
Security                  OFF
SNMP                      OFF
Listener Parameter File   /data/oracle/product/9.2.0/network/admin/listener.ora
Listener Log File         /data/oracle/product/9.2.0/network/log/listener.log
Listening Endpoints Summary...
(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=localhost.localdomain)(PORT=1521)))
(DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=EXTPROC)))
Services Summary...
Service "PLSExtProc" has 1 instance(s).
Instance "PLSExtProc", status UNKNOWN, has 1 handler(s) for this service...
Service "**" has 1 instance(s).
Instance "**", status UNKNOWN, has 1 handler(s) for this service...
Service "**" has 1 instance(s).
Instance "**", status UNKNOWN, has 1 handler(s) for this service...
The command completed successfully

客户端tnsping试一下：

[oracle@smsgw admin]$ tnsping primary

TNS Ping Utility for Linux: Version 9.2.0.4.0 - Production on 26-NOV-2006 07:10:33

Used parameter files:

Used TNSNAMES adapter to resolve the alias
Attempting to contact (DESCRIPTION = (ADDRESS_LIST = (ADDRESS = (PROTOCOL = TCP)(HOST = ****)(PORT = 1521))) (CONNECT_DATA = (SID = smsnew)))
OK (0 msec)
说明可以连接上。

至此，此问题解决。

其实可以制定一个定时的Job去清理listener.log：

[oracle@localhost log]$ more ~/clear_listenerlog.sh

cd /data/oracle/product/9.2.0/network/log/
mv listener.log listener`date +%F`.log.bak
[oracle@localhost log]$ ls -l ~/clear_listenerlog.sh
-rwxr-xr-x 1 oracle oinstall 88 Nov 27 15:07 /home/oracle/clear_listenerlog.sh
[oracle@localhost log]$ crontab -l

# DO NOT EDIT THIS FILE - edit the master and reinstall.
# (/tmp/crontab.8411 installed on Fri Mar 3 13:01:58 2006)
# (Cron version -- $Id: crontab.c,v 2.13 1994/01/17 03:20:37 vixie Exp $)
#00 02 * * * sh /app/shell/oraclesh/logic_bak.sh

00 01 1 * * /home/oracle/clear_listenerlog.sh

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