OneClicks freezes intermittently and needs a tomcat restart after upgrade to 24.3.4

Products

• Network Observability
• Spectrum

Issue/Introduction

You upgraded to 24.3.4 from 22.2.11 and all OneClick clients connected to the same Oneclick freeze at the same time, several times per day.  The tomcat service needs to be restarted to resolve this.  You are not able to reproduce on your lab by leaving it running for an extended period.  

Environment

Spectrum 24.3.1 to 24.3.10

 

Cause

This is caused when a user with a large number of favorites tries to expand the favorites in the OneClick GUI, leading to performance issue and a tomcat freeze. If you do not have a lot of favorites, you should not see this problem.

Resolution

24.03.04.D300 and 24.3.6_D302 has been created to resolve this problem via code optimization for the 24.3.4 and 24.3.6 versions respectively.  Please contact support for either of these patches if you experience this problem on either of these versions.

For other versions, the problem can be worked around by add the following to web.xml and restarting tomcat.  

<context-param xmlns="">
    <param-name>com.aprisma.topo.ModelRepository.ThrottledModelReadThreads</param-name>
    <param-value>128</param-value>
    <description>This parameter defines the maximum number of threads the Model
        Repository will use during ThrottledModelReadThreads from the SpectroSERVER.</description>
</context-param>

This is tentativly scheduled to be added to the 24.3.11 version of the product.

Additional Information

The workaround in web.xml may be overwritten on upgrade but if the system is upgraded to 24.3.11 (to be confirmed) or greater, the code changes added to the release will avoid this issue.