After upgrading to Spectrum 22.2. some Java clients will not start

Products

• DX NetOps

Issue/Introduction

After upgrading to 22.2.10, some customers cannot start Java clients.

All clients are using OpenWebStart 1.7 and Oracle JRE 11.0.21. and the majority have no issues to start Java clients but some a jnlp.LaunchException

Fatal: Initialization Error: Could not initialize application. The application has not been initialized, for more information execute javaws from the command line.
........
Caused by: java.io.IOException: java.lang.NullPointerException: name can't be null

Environment

Spectrum 22.2.10

OpenWebStart 1.7

Oracle JRE 11.0.21.

Cause

The OpenWebStart is populating an incorrect Java path on the client pc using lower case j for Java folder. 

C:\Program Files (x86)\java 

instead of

C:\Program Files (x86)\Java

 

Resolution

On the client pc, Open the OpenWebStart settings interface from Start - OpenWebStart - OpenWebStart settings

or run C:\Program Files\OpenWebStart\itw-settings.exe

Choose JVM Manager and "Remove all JVMs"

Choose "Add local..." and browse to the correct location of the JRE 11.x install.

Click on the 3 dots on the right to activate it.

Download the JNLP again and test.

Additional Information

The reason for this is unknown at present but seems to be a problem on OpenWebStart "Find local" functionality.  Further testing is needed to verify.

On the OneClick webpage, Home - Install the JRE and Web Start Client, we document the need for OpenWebStart and JRE 11.0.18.  The JRE link is is for OpenJDK as seen in the above image but customer can use Oracle Java if the have the correct license.  

Installing the Java Runtime Environment and Web Start Client

To run DX NetOps Spectrum OneClick Console you will need to install the Java Runtime Environment (JRE) version 11.0.18 and OpenWebStart version 1.7.0. The OpenWebStart includes the Java Web Start client, which is required to run JNLP applications like DX NetOps Spectrum OneClick Console.

To install the JRE and Web Start Client:

1. Download and install the Java Runtime Environment version 11.0.18 .
2. Download and install the OpenWebStart version 1.7.0 .
3. Add and Activate the downloaded Java11 JRE in OpenWebStart JVM Manager using <OpenWebstart install directory>/itw-settings
4. Click on the Start Console link above.