Lsnrctl status/start 卡住问题及解决办法
Lsnrctl status/start hangs
转载请注明出处：http://blog.csdn.net/xiaofan23z
Environment：
HPUX B11.31 + oracle 10.2.0.4 three nodes rac
Symptom：
The listener on the first node was stoped and can’t be start use crs_start or lsnrctl start，restart the instance symptom still exist；
Crs_stat rac1.lsnr offline
Use lsnrctl status/start command will be stuck。
Use crs_start ora.sfc12rc1.LISTENER_SFC12RC1.lsnr command will be stuck.
Restart this instance symptom still exist; there is no way to shutdown this node，but users complained the program sometimes hangs when it open；
There is no error information in alert.log listener.log。
Solution：
the program sometimes hangs when it open，sometimes is normal。
Check that：
Crs_stat –t –v instance was down
Use commandPs –ef|grep tnsfind listener_sfc12rc1 still alive….. this is the root of the program。
Kill -9 ospid kill this listener on os；
Startup database solve the problem out；
转载请注明出处：http://blog.csdn.net/xiaofan23z
Tworelateddocumentation on MOS
Intermittent TNS Listener Hang, New Child Listener Process Forked [ID 340091.1]
| Modified 03-JUN-2011 Type ALERT Status PUBLISHED |
|
In this Document
Description
Likelihood of Occurrence
Possible Symptoms
Workaround or Resolution
Patches
Modification History
References
Applies to:
Oracle Net Services - Version: 10.1.0.3.0 to 10.2.0.2.0 - Release: 10.1 to 10.2
Information in this document applies to any platform.
All new connections via TNS listener hang, no errors reported
Checked for relevance on 05-FEB-2010.
Description
Intermittently the TNS listener hangs and new connections to the database are not possible.
Likelihood of Occurrence
The issue is that the TNS listener can hang under load if a second spawned listener process is not closed (remains persistent). Secondary listener processes are not unusual, depending on traffic as well as when the OS grep snapshot is taken. However, a persistent secondary process (longer than say 5 second) is not normal and may be a result of this referenced problem.
TNS listener can hang at any time and effect standalone or RAC systems
Possible Symptoms
Listener process can also consume high amount of CPU
Child TNS listener process is seen when doing a ps on the listener process, eg.:
$ ps -ef | grep tnslsnr
ora10g 8909 1 0 Sep 15 ? 902:44 /u05/10GHOME/DBHOME/bin/tnslsnr sales -inherit
ora10g 22685 8909 0 14:19:23 ? 0:00 /u05/10GHOME/DBHOME/bin/tnslsnr sales -inherit
Killing the child process allows new connections to work until the problem reoccurs
Workaround or Resolution
Issue is fixed in 10.2.0.3 Patch Set
Oracle Support recommends patching to 10.2.0.5 as this the lastest release
- OR -
Apply Patch 4518443 for the problem (if a patch is available)
- OR -
As a workaround, two steps should be done:
1. The following parameter can be added to listener.ora
SUBSCRIBE_FOR_NODE_DOWN_EVENT_
Where
For example, if the listener name is LISTENER (default), the parameter would be:
SUBSCRIBE_FOR_NODE_DOWN_EVENT_LISTENER=OFF
2. Locate the ons.config file in the 10g(rdbms) home and rename it to something else.
For example:
cd $ORACLE_HOME/opmn/conf
mv ons.config ons.config.orig
The listener needs to be restarted after these changes.
This will both prevent the listener from registering against ONS (Oracle Notification Services), which is the area affected by bug:4518443, as well as disable ONS itself. For more information on ONS, please refer to the specific Oracle documentation, for example, for 10.2, see the Oracle10g Release 2 Oracle Clusterware and Oracle Real Application Clusters Administration and Deployment Guide.
Please note, that adding the SUBSCRIBE_FOR_NODE_DOWN_EVENT_
Also, please note that this might happen with ANY 10g installation, whether it is RAC related or not, and whether there is an Oracle Application installation or not.
Patches
ApplyPatch 4518443 for the problem (if a patch is available)
Modification History
References
| Related Products · Oracle Database Products > Oracle Database > Net Services > Oracle Net Services Keywords
|
Back to top
| Extproc Listener Spinning / Hanging [ID 406269.1] |
||
|
|
||
|
|
Modified 21-AUG-2007 Type PROBLEM Status MODERATED |
|
In this Document
Symptoms
Cause
Solution
References
| This document is being delivered to you via Oracle Support'sRapid Visibility (RaV) process, and therefore has not been subject to an independent technical review. |
Applies to:
Oracle Net Services - Version: 10.2.0.2
This problem can occur on any platform.
UNIX platforms
Symptoms
On 10.2.x (On UNIX platforms):
- Trying to start extproc listener as non-'oracle' user
- lsnrctl hangs and the tnslsnr process spins (consumes excessive cpu).
- Works fine when started as the 'oracle' user.
- No errors as such just spinning/hanging and inabillity to connect to extproc listener.
- Listener log file indicates that listener has started.
- On node that works the listener log also contains the message:
'Listener completed notification to CRS on start'.
- This doesn't appear on node with problem.
- Trace file also indicates that the listener is trying to contact CRS. As not using RAC.
- Trying workaround of the bug 4518443 by setting:
'SUBSCRIBE_FOR_NODE_DOWN_EVENT_
Cause
- The problem is caused by lack of world read permission on $ORACLE_HOME/log.
- This probably had been set on the working system earlier.
- The script changePerm.sh does evidently doesn't set this ,although it might be expected to.
Solution
DIAGNOSTIC DETAILS:
==================
Running truss -feao /tmp/truss.log $ORACLE_HOME/bin/tnslsnr EXTPROC_MERLYN1
on non-working system shows the following:
- Listener is looping while trying to access:
$ORACLE_HOME/log/ukblx187/client
,but failing with err# 13.
- Notice that on working system (ukblx186) permissions on:
$ORACLE_HOME/log
were 755 (world read+execute)
,while on non-working they were 750
- Change the permission of:
$ORACLE_HOME/log
on non-working to be 755 , however it might still not work.
- Then rm -rf $ORACLE_HOME/log/ukblx187
retry and all works, the above directory being automatically recreated.
NOTES / ISSUES:
=============
1 - The $ORACLE_HOME/log/
2 - It is not needed to delete it and grant execute to world (read isn't needed) on:
$ORACLE_HOME/log
before the listener would work.
3 - It is possible that after implementing this ,the extproc listener now starts up as a non-oracle user
but when trying to to invoke the extproc program, it fails with:
ORA-12518 - Couldn't hand off client Connection
- This can be fixed by granting world read and execute permission on
$ORACLE_HOME/lib/libagtsh.so.1.0
4 - One further problem might be encountered:
The extproc process failed with:
ORA 28595 - Extproc Agent Invalid DLL path
- This is because a third party supplied shared library was needed which have been stored outside $ORACLE_HOME.
- The solution is covered in Note 198523.1
References
NOTE:198523.1 - External Procedure Calls and ORA-28595 In Versions 9.2 through 10gR2
NOTE:340091.1 - Intermittent TNS listener hang, new child listener process forked.
| Related Products
Keywords
Errors
|
Copyright (c) 2007, 2010, Oracle. All rights reserved. Legal Notices and Terms of Use | Privacy Statement
转载请注明出处：http://blog.csdn.net/xiaofan23z