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{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Error with gcloud-java for datastore access from compute engine: “LookupRequest overrides final method getUnknownFields”","articleBody":"I started a brand new Java project (Java 8) and used maven to pull down my dependencies:\n\n```\n\u003cdependency\u003e\n  \u003cgroupId\u003ecom.google.gcloud\u003c/groupId\u003e\n  \u003cartifactId\u003egcloud-java\u003c/artifactId\u003e\n  \u003cversion\u003e0.1.4\u003c/version\u003e\n\u003c/dependency\u003e\n```\n\nI then wrote a very simple test call to write to the datastore... but there seems to be something structurally wrong with the library... here is the exception I ran into:\n\n```\njava.lang.VerifyError: class com.google.api.services.datastore.DatastoreV1$LookupRequest overrides final method getUnknownFields.\n\n()Lcom/google/protob\nuf/UnknownFieldSet;\n        at java.lang.ClassLoader.defineClass1(Native Method)\n        at java.lang.ClassLoader.defineClass(ClassLoader.java:760)\n        at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)\n        at java.net.URLClassLoader.defineClass(URLClassLoader.java:467)\n        at java.net.URLClassLoader.access$100(URLClassLoader.java:73)\n        at java.net.URLClassLoader$1.run(URLClassLoader.java:368)\n        at java.net.URLClassLoader$1.run(URLClassLoader.java:362)\n        at java.security.AccessController.doPrivileged(Native Method)\n        at java.net.URLClassLoader.findClass(URLClassLoader.java:361)\n        at java.lang.ClassLoader.loadClass(ClassLoader.java:424)\n        at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331)\n        at java.lang.ClassLoader.loadClass(ClassLoader.java:357)\n        at com.google.gcloud.datastore.DatastoreOptions.normalize(DatastoreOptions.java:123)\n        at com.google.gcloud.datastore.DatastoreOptions.access$400(DatastoreOptions.java:36)\n        at com.google.gcloud.datastore.DatastoreOptions$Builder.build(DatastoreOptions.java:89)\n        at com.google.gcloud.datastore.DatastoreOptions.defaultInstance(DatastoreOptions.java:175)\n\n    ... my code here which called Datastore datastore = DatastoreOptions.defaultInstance().service();\n\n```\n\nI have plenty of jars but my environment is clean... I don't have any of the legacy google.appengine.\\* jars around. Just to make sure:\n\n`find . -name \"*.jar\" -exec grep -Hsli LookupRequest {} \\;`\nreturned only:\n\n`./google-api-services-datastore-protobuf-v1beta2-rev1-4.0.0.jar`\n\nIs the Google distribution broken? Is this a me thing? Any help appreciated.\n","author":{"url":"https://github.com/unitydynamics","@type":"Person","name":"unitydynamics"},"datePublished":"2016-02-28T16:56:27.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":6},"url":"https://github.com/681/google-cloud-java/issues/681"}