The App Engine Standard Environment <https://cloud.google.com/appengine/docs>only supports Java 7. Therefore if any of your libraries are built for Java 8 you will see this warning. The solution is to either remove any reference to Java 8 in your code, or to deploy your code to the App Engine Flexible Environment which does support Java 8.
If you experience any further issues after performing the above, you can provide details about your setup and stack trace to Stack Overflow. Google groups is intended for general discussions rather than 1-on-1 support assistance. You can see our Community Support [1] page for a list of the tags we monitor. Before posting a question to Stack Overflow it's a good idea to read over the guidelines at 'How do I ask a good question' [2]. [1] https://support.google.com/cloud/answer/3466163?hl=en [2] http://stackoverflow.com/help/how-to-ask -- You received this message because you are subscribed to the Google Groups "Google App Engine" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at https://groups.google.com/group/google-appengine. To view this discussion on the web visit https://groups.google.com/d/msgid/google-appengine/cd9d2ad8-6156-48c1-af7f-3eca5dbb829c%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
