ORA-04021: timeout occured while waiting to lock object

Posted on 2001-07-05
Last Modified: 2007-11-27
I get the following error when trying to reload or drop a specific Java class <classname> from an Oracle 8.1.7 DB using the loadjava or dropjava utility...

ORA-04021: timeout occured while waiting to lock object <classname>

As far as I know, the class is not in use by anything else.  I still continue to get this message after about a day of waiting.  Why might this be happening and more importantly, how can I stop this error from occuring?

Question by:basilisk14
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 4
  • 2

Expert Comment

ID: 6255812
I think a session is still having a lock on your object.
Try viewing v$lock if this is true.
Kill the session that is locking your object.

If the session doesn't disappear and is marked for being killed and the PMON hasn't enough resources to clear the session, you have to bring down the dbase. (or try using the ORAKILL utility, see metalink).

Author Comment

ID: 6255993
Could you please clarify about how I would go about doing these things?  I am not the DBA, but I could let him know the solution if it is more specific.  Thanks.

Author Comment

ID: 6256004
Could you please clarify about how I would go about doing these things?  I am not the DBA, but I could let him know the solution if it is more specific.  Thanks.
Independent Software Vendors: We Want Your Opinion

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!


Accepted Solution

vanmeerendonk earned 50 total points
ID: 6258508
sorry, it was midnight when You asked me.
Well, with
select s.sid
,substr (s.osuser, 1, 10) username, substr (o.object_name, 1, 20) object
,      l.lmode, s.process, substr(s.program, 1, 25) program
from   v$lock l, all_objects o, v$session s
where  o.object_id = l.id1
and    s.sid       = l.sid
and l.type = 'TM'
you can look at the locks. With
you kill the session.

But with all of the above you have to have the appropriate grants! I think it's better for you to identify the lock and inform the DBA (he really should know what to do)

As a developer there's nothing more to do that identify and wait.


Author Comment

ID: 6260057
When I run the query I get "table or view does not exist".  Do you know why that might be?

Author Comment

ID: 6275300
Sorry for the delay...thanks.

Featured Post

Efficient way to get backups off site to Azure

This user guide provides instructions on how to deploy and configure both a StoneFly Scale Out NAS Enterprise Cloud Drive virtual machine and Veeam Cloud Connect in the Microsoft Azure Cloud.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Background In several of the companies I have worked for, I noticed that corporate reporting is off loaded from the production database and done mainly on a clone database which needs to be kept up to date daily by various means, be it a logical…
Configuring and using Oracle Database Gateway for ODBC Introduction First, a brief summary of what a Database Gateway is.  A Gateway is a set of driver agents and configurations that allow an Oracle database to communicate with other platforms…
This video shows information on the Oracle Data Dictionary, starting with the Oracle documentation, explaining the different types of Data Dictionary views available by group and permissions as well as giving examples on how to retrieve data from th…
This video shows how to Export data from an Oracle database using the Datapump Export Utility.  The corresponding Datapump Import utility is also discussed and demonstrated.
Suggested Courses

630 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question