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java.lang.NoSuchFieldError: tupleType	at org.peelframework.wordcount.flink.FlinkWC$$anon$2.protected$tupleType(FlinkWC.scala:20)	at org.peelframework.wordcount.flink.FlinkWC$$anon$2$$anon$1.(FlinkWC.scala:20)	at org.peelframework.wordcount.flink.FlinkWC$$anon$2.createSerializer(FlinkWC.scala:20)	at org.apache.flink.optimizer.postpass.JavaApiPostPass.createSerializer(JavaApiPostPass.java:283)	at org.apache.flink.optimizer.postpass.JavaApiPostPass.traverseChannel(JavaApiPostPass.java:252)	at org.apache.flink.optimizer.postpass.JavaApiPostPass.traverse(JavaApiPostPass.java:97)	at org.apache.flink.optimizer.postpass.JavaApiPostPass.postPass(JavaApiPostPass.java:81)	at org.apache.flink.optimizer.Optimizer.compile(Optimizer.java:518)	at org.apache.flink.optimizer.Optimizer.compile(Optimizer.java:397)	at org.apache.flink.client.program.Client.getOptimizedPlan(Client.java:233)	at org.apache.flink.client.program.Client.getOptimizedPlan(Client.java:521)	at org.apache.flink.client.program.Client.runBlocking(Client.java:314)	at org.apache.flink.client.program.ContextEnvironment.execute(ContextEnvironment.java:70)	at org.apache.flink.api.scala.ExecutionEnvironment.execute(ExecutionEnvironment.scala:627)	at org.peelframework.wordcount.flink.FlinkWC$.main(FlinkWC.scala:25)	at org.peelframework.wordcount.flink.FlinkWC.main(FlinkWC.scala)	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)	at java.lang.reflect.Method.invoke(Method.java:498)	at org.apache.flink.client.program.PackagedProgram.callMainMethod(PackagedProgram.java:497)	at org.apache.flink.client.program.PackagedProgram.invokeInteractiveModeForExecution(PackagedProgram.java:395)	at org.apache.flink.client.program.Client.runBlocking(Client.java:252)	at org.apache.flink.client.CliFrontend.executeProgramBlocking(CliFrontend.java:676)	at org.apache.flink.client.CliFrontend.run(CliFrontend.java:326)	at org.apache.flink.client.CliFrontend.parseParameters(CliFrontend.java:978)	at org.apache.flink.client.CliFrontend.main(CliFrontend.java:1028)