Migrating AppEngine Standard from Java11 to Java17

[Sebastian Filip]

Hello guys,

I am looking to migrate a Java Project written in Ninja Framework from Java 11 to Java 17, and therefore I am looking to migrate away from Objectify 5 to 6.

I keep on getting errors like:

[INFO] GCLOUD: java.lang.RuntimeException: Unable to create a DevAppServer
[INFO] GCLOUD: at com.google.appengine.tools.development.DevAppServerFactory.doCreateDevAppServer(DevAppServerFactory.java:391)
[INFO] GCLOUD: at com.google.appengine.tools.development.DevAppServerFactory.createDevAppServer(DevAppServerFactory.java:314)
[INFO] GCLOUD: at com.google.appengine.tools.development.DevAppServerMain$StartAction.apply(DevAppServerMain.java:360)

when trying to run locally. 

Do you have any tips or tricks on how to migrate away successfully? Has someone done it in the past?

[Jeff Schnitzer]

Is there a nested exception in there? This really isn't a lot to go on.

Jeff

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