ORA-04021: Timeout occurred while waiting to lock object ORA-06512: a).

Products

• CA eHealth

Issue/Introduction

Problem :

While upgrading eHealth 6.3.2.x to 6.3.2.10 as NH_USER the upgrade fails with the below error in install log file :...

     Error: Database error: updateQueues (ORA-04021: timeout occurred while waiting to lock object ORA-06512: a).

     Error: The program updateQueues failed.

     updating live ex tables ...

     updating cndc tables ...

     Command /opt/CA/ehealth/bin/sys/nhiDbTasks -doConvert -userLog /opt/CA/ehealth/log/conversion.<...>log failed..

     Error : Off line convert failed in convertStandalone.

 

 

 

Environment:

 

CA-ehealth 6.2.2 and above
Windows / Linux / UNIX

 

 

 

CAUSE

 

The ORA-04021 Error Message means that the objects cannot be changed while they are in use, and therefore a lock must be taken out on an object in order to modify it.

 

 

 

Resolution :

 

To resolve the ORA 04021 Error,  You may wait until the other process has finished using the object or perhaps you can kill the session or recycle the Oracle Server.

 

• nhStopDb immediate
• Reboot the machine
• Do undo convert "nhConvertDb -undoconvert"
• Before restarting the ehealth upgrade, execute the command "nhConvertDb -undoconvert"
• Start upgrade again

 

Additional Information:

We have also seen this issue on a functioning eHealth poller, with following error:

Pgm nhiPoller[Net]: Unable to add 'network element' data to the database, dropping this poll. 

Pgm nhiPoller[Net]: Sql Error occurred during operation: 'ORA-04021: timeout occurred while waiting to lock object '; possible problem data is: element id: 1317549, sampleTime: 1461128399 for table nh_stats0_1461130199.

 

For this problem, same solution applies, except for upgrade step:

• nhServer stop 
• nhStopDb immediate
• Reboot the system if possible or
• nhStartDb 
• nhServer start

Environment

Release: LHDEVC99000-6.3-eHealth-Live Health Upgrade Elements
Component: