Hi, there I ran into a problem when I try to pass external jar file to spark-shell.
I have a uber jar file that contains all the java codes I created for protobuf and all its dependency. If I simply execute my code using Scala Shell, it works fine without error. I use -cp to pass the external uber jar file here ./scala -cp ~/workspace/protobuf/my-app/target/my-app-1.0-SNAPSHOT-jar-with-dependencies.jar scala> import com.test.proto.Tr.MyProto import com.test.proto.Tr.MyProto scala> import java.nio.file.{Files, Paths} import java.nio.file.{Files, Paths} scala> val byteArray = Files.readAllBytes(Paths.get("/Users/ljiang/workspace/protobuf/my-app/myproto.pro")) byteArray: Array[Byte] = Array(10, -62, -91, 2, -86, 6, -108, 65, 8, 10, 18, -113, 65, -54, 12, -85, 46, -22, 18, -30, 10, 10, 2, 73, 78, 18, -37, 10, -118, 25, -52, 10, -22, 43, 15, 10, 1, 49, 18, ... scala> val myProto = MyProto.parseFrom(byteArray) Now the weird thing is that if I launched the spark-shell instead and execute the same code (Please note that I do not even using any SparkContext, RDD), it does not work. I use --jars option to pass the external jar file to spark-shell spark-shell --jars ~/workspace/protobuf/my-app/target/my-app-1.0-SNAPSHOT-jar-with-dependencies.jar scala> import com.test.proto.Tr.MyProto import com.test.proto.Tr.MyProto scala> import java.nio.file.{Files, Paths} import java.nio.file.{Files, Paths} scala> val byteArray = Files.readAllBytes(Paths.get("/Users/ljiang/workspace/protobuf/my-app/myproto.pro")) byteArray: Array[Byte] = Array(10, -62, -91, 2, -86, 6, -108, 65, 8, 10, 18, -113, 65, -54, 12, -85, 46, -22, 18, -30, 10, 10, 2, 73, 78, 18, -37, 10, -118, 25, -52, 10, -22, 43, 15, 10, 1, 49, 18, ... scala> val myProto = MyProto.parseFrom(byteArray) java.lang.NoSuchFieldError: unknownFields at com.test.proto.Tr$MyProto.<init>(Tr.java) at com.test.proto.Tr$MyProto.<init>(Tr.java) at com.test.proto.Tr$MyProto$1.parsePartialFrom(Tr.java) at com.test.proto.Tr$MyProto$1.parsePartialFrom(Tr.java) at com.google.protobuf.AbstractParser.parsePartialFrom(AbstractParser.java:141) at com.google.protobuf.AbstractParser.parseFrom(AbstractParser.java:176) at com.google.protobuf.AbstractParser.parseFrom(AbstractParser.java:188) at com.google.protobuf.AbstractParser.parseFrom(AbstractParser.java:193) at com.google.protobuf.AbstractParser.parseFrom(AbstractParser.java:49) at com.test.proto.Tr$MyProto.parseFrom(Tr.java) at $iwC$$iwC$$iwC$$iwC$$iwC$$iwC$$iwC$$iwC.<init>(<console>:23) at $iwC$$iwC$$iwC$$iwC$$iwC$$iwC$$iwC.<init>(<console>:28) at $iwC$$iwC$$iwC$$iwC$$iwC$$iwC.<init>(<console>:30) at $iwC$$iwC$$iwC$$iwC$$iwC.<init>(<console>:32) at $iwC$$iwC$$iwC$$iwC.<init>(<console>:34) at $iwC$$iwC$$iwC.<init>(<console>:36) at $iwC$$iwC.<init>(<console>:38) at $iwC.<init>(<console>:40) at <init>(<console>:42) at .<init>(<console>:46) at .<clinit>(<console>) at .<init>(<console>:7) at .<clinit>(<console>) at $print(<console>) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:606) at org.apache.spark.repl.SparkIMain$ReadEvalPrint.call(SparkIMain.scala:1065) at org.apache.spark.repl.SparkIMain$Request.loadAndRun(SparkIMain.scala:1338) at org.apache.spark.repl.SparkIMain.loadAndRunReq$1(SparkIMain.scala:840) at org.apache.spark.repl.SparkIMain.interpret(SparkIMain.scala:871) at org.apache.spark.repl.SparkIMain.interpret(SparkIMain.scala:819) at org.apache.spark.repl.SparkILoop.reallyInterpret$1(SparkILoop.scala:857) at org.apache.spark.repl.SparkILoop.interpretStartingWith(SparkILoop.scala:902) at org.apache.spark.repl.SparkILoop.command(SparkILoop.scala:814) at org.apache.spark.repl.SparkILoop.processLine$1(SparkILoop.scala:657) at org.apache.spark.repl.SparkILoop.innerLoop$1(SparkILoop.scala:665) at org.apache.spark.repl.SparkILoop.org$apache$spark$repl$SparkILoop$$loop(SparkILoop.scala:670) at org.apache.spark.repl.SparkILoop$$anonfun$org$apache$spark$repl$SparkILoop$$process$1.apply$mcZ$sp(SparkILoop.scala:997) at org.apache.spark.repl.SparkILoop$$anonfun$org$apache$spark$repl$SparkILoop$$process$1.apply(SparkILoop.scala:945) at org.apache.spark.repl.SparkILoop$$anonfun$org$apache$spark$repl$SparkILoop$$process$1.apply(SparkILoop.scala:945) at scala.tools.nsc.util.ScalaClassLoader$.savingContextLoader(ScalaClassLoader.scala:135) at org.apache.spark.repl.SparkILoop.org$apache$spark$repl$SparkILoop$$process(SparkILoop.scala:945) at org.apache.spark.repl.SparkILoop.process(SparkILoop.scala:1059) at org.apache.spark.repl.Main$.main(Main.scala:31) at org.apache.spark.repl.Main.main(Main.scala) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:606) at org.apache.spark.deploy.SparkSubmit$.org$apache$spark$deploy$SparkSubmit$$runMain(SparkSubmit.scala:665) at org.apache.spark.deploy.SparkSubmit$.doRunMain$1(SparkSubmit.scala:170) at org.apache.spark.deploy.SparkSubmit$.submit(SparkSubmit.scala:193) at org.apache.spark.deploy.SparkSubmit$.main(SparkSubmit.scala:112) at org.apache.spark.deploy.SparkSubmit.main(SparkSubmit.scala) Is there anything else I need to do to pass the external jar files to the spark shell??? Thanks