With vaadin-core-14.9.x ServerInfo#fetchVaadinVersion only checks for "vaadin-versions.json" causing extra logging and no platform version in DevModeGizmo

[lmorocz]

Description of the bug

Since #13749 there are two separate versions.json files for vaadin-core (vaadin-core-versions.json) and vaadin (vaadin-versions.json) maven artifacts.

Since v14.9.0 there is a com.vaadin.flow.internal.ServerInfo class with a fetchVaadinVersion method which in DEV mode tries to obtain the Vaadin platform version from vaadin-versions.json, but if you opt for the vaadin-core maven dependency then there is no such file, only a vaadin-core-versions.json in the vaadin-core module.

Because of this there is no platform version in DevModeGizmo and every time a new UI is created the Unable to determine version information. No vaadin_versions.json found INFO message appears with the com.vaadin.flow.internal.ServerInfo logger.

Expected behavior

In DEV mode with vaadin-core 14.9.2+ dependency there shouldn't be Unable to determine version information. No vaadin_versions.json found INFO message for com.vaadin.flow.internal.ServerInfo logger, and there should be a platform version in DevModeGizmo.

Minimal reproducible example

1. Download any (Spring Boot or Plain Java) Vaadin v14.9.1 flow starter package from https://vaadin.com/hello-world-starters (like https://github.com/vaadin/skeleton-starter-flow-spring/archive/v14.zip or https://github.com/vaadin/skeleton-starter-flow/archive/v14.zip).
2. Unzip, in pom.xml search for:

    <dependencies>
        <dependency>
            <groupId>com.vaadin</groupId>
            <!-- Replace artifactId with vaadin-core to use only free components -->
            <artifactId>vaadin</artifactId>

modify the vaadin artifactId to vaadin-core

    <dependencies>
        <dependency>
            <groupId>com.vaadin</groupId>
            <!-- Replace artifactId with vaadin-core to use only free components -->
            <artifactId>vaadin-core</artifactId>

3. Compile and start the app with mvn
4. Load http://localhost:8080 on any browser and check the logs for messages like this:

2022-11-22 10:54:25.887  INFO 11912 --- [nio-8080-exec-3] com.vaadin.flow.internal.ServerInfo      : Unable to determine version information. No vaadin_versions.json found

Workaround

Use this configuration in your vaadin-core based Spring Boot application.properties to start without the DevModeGizmo and the new License Checker:

vaadin.devmode.liveReload.enabled=false
vaadin.oldLicenseChecker=true

Versions

• Vaadin / Flow version: 14.9.1
• Java version: 11 (not relevant)
• OS version: Windows 10 Pro x64 (not relevant)
• Browser version (if applicable): Chrome 107.0.5304.107 (official) (64 bit) (not relevant)
• Application Server (if applicable): Tomcat (not relevant)
• IDE (if applicable): IDEA (not relevant)

[vaadin-bot]

This ticket/PR has been released with Vaadin 14.9.2.

[lmorocz]

Thanks for the quick fix @caalador!