TNS-12547 Linux Error: 104: Connection reset by peer

解决过程参考:http://blog.chinaunix.net/u/7121/showart_403812.html

[oracle@MyMachine log]$ lsnrctl start
LSNRCTL for Linux: Version 10.2.0.1.0 - Production on 23-JUN-2009 09:53:26

Copyright (c) 1991, 2005, Oracle. All rights reserved.

Starting /opt/oracle/product/10.2.1/db_1/bin/tnslsnr: please wait...

TNSLSNR for Linux: Version 10.2.0.1.0 - Production
System parameter file is /opt/oracle/product/10.2.1/db_1/network/admin/listener.ora
Log messages written to /opt/oracle/product/10.2.1/db_1/network/log/listener.log
Listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=EXTPROC1)))
Listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=MyMachine.localdomain)(PORT=1521)))

Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=IPC)(KEY=EXTPROC1)))
TNS-12547: TNS:lost contact
TNS-12560: TNS:protocol adapter error
TNS-00517: Lost contact
Linux Error: 104: Connection reset by peer
Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=MyMachine.localdomain)(PORT=1521)))
TNS-12541: TNS:no listener
TNS-12560: TNS:protocol adapter error
TNS-00511: No listener
Linux Error: 111: Connection refused
解决过程：
[oracle@MyMachine log]$ more /etc/hosts
# Do not remove the following line, or various programs
# that require network functionality will fail.
10.10.5.24 MyMachine.localdomain
10.10.3.254 host54.localdomain

[root@MyMachine ~]# vi /etc/hosts
# Do not remove the following line, or various programs
# that require network functionality will fail.
127.0.0.1 localhost #添加
10.10.5.24 MyMachine.localdomain
10.10.3.254 host54.localdomain

重新启动监听：
[oracle@MyMachine log]$ lsnrctl start
LSNRCTL for Linux: Version 10.2.0.1.0 - Production on 23-JUN-2009 09:55:47
Copyright (c) 1991, 2005, Oracle. All rights reserved.
Starting /opt/oracle/product/10.2.1/db_1/bin/tnslsnr: please wait...
TNSLSNR for Linux: Version 10.2.0.1.0 - Production
System parameter file is /opt/oracle/product/10.2.1/db_1/network/admin/listener.ora
Log messages written to /opt/oracle/product/10.2.1/db_1/network/log/listener.log
Listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=EXTPROC1)))
Listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=MyMachine.localdomain)(PORT=1521)))
Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=IPC)(KEY=EXTPROC1)))
STATUS of the LISTENER
------------------------
Alias LISTENER
Version TNSLSNR for Linux: Version 10.2.0.1.0 - Production
Start Date 23-JUN-2009 09:55:48
Uptime 0 days 0 hr. 0 min. 0 sec
Trace Level off
Security ON: Local OS Authentication
SNMP OFF
Listener Parameter File /opt/oracle/product/10.2.1/db_1/network/admin/listener.ora
Listener Log File /opt/oracle/product/10.2.1/db_1/network/log/listener.log
Listening Endpoints Summary...
(DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=EXTPROC1)))
(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=MyMachine.localdomain)(PORT=1521)))
Services Summary...
Service "PLSExtProc" has 1 instance(s).
Instance "PLSExtProc", status UNKNOWN, has 1 handler(s) for this service...
Service "orcl" has 1 instance(s).
Instance "orcl", status UNKNOWN, has 1 handler(s) for this service...
The command completed successfully

在网上搜索一下,另一种TNS-12547: TNS:lost contact的情况,具体错误如下:
TNS-12547: TNS:lost contact
TNS-12560: TNS:protocol adapter error
TNS-00517: Lost contact
Linux Error: 32: Broken pipe
原因:listener.log文件超过2G
解决方法:清空日志文件
[oracle@chicago ~]$ cd $ORACLE_HOME/network/log
[oracle@chicago log]$ cat /dev/null > listener.log