oracle两个数据库连接,Oracle数据库连接hang出现两个listener

oracle数据库连接hang，出现了两个listener，一个是另一个子进程

Oracle数据库连接hang，出现了两个listener，一个是另一个子进程

处理过程如下

1，出现问题时，用户连接hang住，出现两个listener，现有连接无问题

$ ps -ef|grep lsnr

oracle 26327 1 0 12月 24 ? 5:34 /oracle/product/10.2.0.1/bin/tnslsnr LISTENER -inherit

oracle 16352 12931 1 10:44:26 pts/4 0:00 grep lsnr

oracle 28413 26327 0 21:40:46 ? 0:00 /oracle/product/10.2.0.1/bin/tnslsnr LISTENER -inherit

patrol 29576 29575 0 21:45:19 ? 0:00 /oracle/product/10.2.0.1/bin/lsnrctl stat LISTENER

2，为快速恢复问题，杀掉进程

$ kill -9 26327

3，重启

$ lsnrctl start

LSNRCTL for HPUX: Version 10.2.0.1.0 - Production on 26-DEC-2012 10:44:54

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

Starting /oracle/product/10.2.0.1/bin/tnslsnr: please wait...

TNSLSNR for HPUX: Version 10.2.0.1.0 - Production

System parameter file is /oracle/product/10.2.0.1/network/admin/listener.ora

Log messages written to /oracle/product/10.2.0.1/network/log/listener.log

Listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=rps02)(PORT=1521)))

Listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=EXTPROC0)))

Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=rps02)(PORT=1521)))

STATUS of the LISTENER

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

Alias LISTENER

Version TNSLSNR for HPUX: Version 10.2.0.1.0 - Production

Start Date 26-DEC-2012 10:44:56

Uptime 0 days 0 hr. 0 min. 0 sec

Trace Level off

Security ON: Local OS Authentication

SNMP ON

Listener Parameter File /oracle/product/10.2.0.1/network/admin/listener.ora

Listener Log File /oracle/product/10.2.0.1/network/log/listener.log

Listening Endpoints Summary...

(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=rps02)(PORT=1521)))

(DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=EXTPROC0)))

Services Summary...

Service "PLSExtProc" has 1 instance(s).

Instance "PLSExtProc", status UNKNOWN, has 1 handler(s) for this service...

The command completed successfully

4，恢复正常，只有一个listener

$

$ ps -ef|grep lsnr

oracle 16503 1 0 10:44:56 ? 0:00 /oracle/product/10.2.0.1/bin/tnslsnr LISTENER -inherit

oracle 17637 12931 1 10:48:17 pts/4 0:00 grep lsnr

$

5，后续查询metalink，基本确定为bug，需打oracle Patch 4518443

详见文件Intermittent TNS Listener Hang, New Child Listener Process Forked [ID 340091.1]

除了打补丁，oracle给出的其它解决方案是

a,修改listener.ora文件

SUBSCRIBE_FOR_NODE_DOWN_EVENT_=OFF

b,移动ons.config文件

cd $ORACLE_HOME/opmn/conf

mv ons.config ons.config.ori

，

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