Fails to launch the OneClick Console (thick client) No suitable JVM was found to start the application

Products

• Spectrum
• Network Observability

Issue/Introduction

When launching the OneClick Console via the oneclick.jnlp file, the application fails to start. Users may see a pop-up error from OpenWebStart indicating that no suitable runtime was found on the local system. This often occurs after JRE updates or when redownloading the JNLP file on systems running DX NetOps Spectrum.

The application fails to launch with the following errors: Error: No suitable JVM was found to start the application. java.lang.IllegalStateException: could not find any suitable runtime

Log files or OpenWebStart logs may show:

text

Trying to find local Java runtime. Requested version: '1.8.0_212', vendor: '*', os: 'WIN64'No local runtime found, will try to find remote runtime.

No suitable JVM was found to start the application

Could not find any suitable runtime

Environment

DX NetOps Spectrum: Any version

Cause

An incorrect supported JRE version is configured in the OneClick Administration page. The JNLP file is generated with a requested version that does not match the JRE installed or recognized by the local OpenWebStart JVM Manager.

Resolution

Update the supported JRE version in the OneClick configuration:

1. Log in to the OneClick Administration web page.
2. Navigate to OneClick Client Configuration.
3. Locate the Supported JRE Version field.
4. Update the version to match your installed JRE (e.g., if using JRE 17, ensure 17* is listed).
5. If using a newer sub-version than explicitly listed, check the Allow new Versions checkbox.
6. Click Save.
7. On the client PC, open OpenWebStart Settings (itw-settings.exe).
8. Go to JVM Manager and click Find local to ensure the correct JRE path is mapped.
9. Download a fresh oneclick.jnlp file from the OneClick home page and launch it.

Additional Information

Alternatively, for temporary testing, the j2se version attribute in the downloaded .jnlp file can be manually edited to match the local JRE version:

xml

<j2se version="17.0.15" href="http://java.sun.com/products/autodl/j2se" />```*