Github user vanzin commented on the pull request: https://github.com/apache/spark/pull/5786#issuecomment-101437368 Just OOC, I build with no enabled profiles and tried to run spark-shell on a real cluster (standalone since YARN profile wasn't enabled). It fails pretty early with: 15/05/12 15:08:18 INFO AppClient$ClientActor: Executor updated: app-20150512150817-0001/8 is now RUNNING java.lang.VerifyError: class org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos$SetOwnerRequestProto overrides final method getUnknownFields.()Lcom/google/protobuf/UnknownFieldSet; at java.lang.ClassLoader.defineClass1(Native Method) at java.lang.ClassLoader.defineClass(ClassLoader.java:800) Which is the issue Favio raised (mismatched protobuf versions).
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