You are right about the two different versions of Guava that appear in the project class path. The Admin SDK imports Guava 20.0, and one of his dependencies (okhttp-eventsource) imports Guava 19.0. Basically, the transitive dependency on Guava 19.0 needs to be avoided. You can accomplish this in a way similar to what is indicated in the snippet below:
dependencies { compile fileTree(dir: 'libs', include: ['*.jar']) compile ('com.launchdarkly:okhttp-eventsource:1.3.0'){ exclude group: "com.google.guava", module: "guava" } compile 'com.google.firebase:firebase-admin:4.1.7' } For more Gradle specific info you may choose to read the "25.4.7. Excluding transitive dependencies" sub-chapter <https://docs.gradle.org/current/userguide/dependency_management.html#sub:exclude_transitive_dependencies> in the documentation. -- 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 google-appengine+unsubscr...@googlegroups.com. To post to this group, send email to google-appengine@googlegroups.com. 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/f0363ad9-3aef-4093-bedb-f7e79243859b%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.