DevServer - App does not starts on target JDK 1.8 and gives Unrecognized option: --add-opens errors

[lokios]

Can we add support for RunConfiguration: This is a new variable introduced in app-enging-core so that we can specify: 1.8 for example. Variable : projectJdkVersion

This error is displayed when we Unrecognized option: --add-opens Error: Could not create the Java Virtual Machine. Error: A fatal exception has occurred. Program will exit.

NOTE: this happens when we run Eclipse with Java 11 ; and want to run the appengine devserver in JDK 1.8

[suztomo]

It's similar to the problem fixed by https://github.com/GoogleCloudPlatform/appengine-plugins-core/pull/917, which was fixed and released as 0.9.10.

The latest release of this repository v1.10.1B already uses appengine-plugins-core 0.9.11. https://github.com/GoogleCloudPlatform/google-cloud-eclipse/blob/v1.10.1B/pom.xml#L101C1-L106C18

    <dependency>
      <!-- bundle: com.google.cloud.tools.appengine -->
      <groupId>com.google.cloud.tools</groupId>
      <artifactId>appengine-plugins-core</artifactId>
      <version>0.9.11</version>
    </dependency>

This change in appengine-plugins-core might require some tweak at the caller.

@lokios Which version of google-cloud-eclipse do you use?

[lokios]

Hi @suztomo, i am using latest Google Cloud Platform for Eclipse i.e. 1.10.1.202306072020

Yes you are correct that pom.xml already has latest dependency of : app-engine-core <artifactId>appengine-plugins-core</artifactId> 0.9.11

However in your eclipse plugin there is no way to pass the new variable: projectJdkVersion which is recenty introduced by 0.9.11 plugin

Due to this limitation i am unable to run JDK 1.8 based projects as its giving : Unrecognized option: --add-opens as add-opens is only supported from JDK 1.9. This error can be avoided is eclipse send projectJdkVersion=1.8 to underlying app-engine-core

Please tell us how we can pass : projectJdkVersion variable with value 1.8 from the latest your eclipse plugin so that it can than be used by underlying app-engine-core plugin?

Thanks

[diegomarquezp]

Closing as not planned as App Engine applications running on JDK 1.8 have reached end of support