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java.lang.NoClassDefFoundError: scala/collection/GenTraversableOnce$class	at kafka.utils.Pool.(Pool.scala:28)	at kafka.consumer.FetchRequestAndResponseStatsRegistry$.(FetchRequestAndResponseStats.scala:60)	at kafka.consumer.FetchRequestAndResponseStatsRegistry$.(FetchRequestAndResponseStats.scala)	at kafka.consumer.SimpleConsumer.(SimpleConsumer.scala:39)	at kafka.javaapi.consumer.SimpleConsumer.(SimpleConsumer.scala:34)	at org.apache.flink.streaming.connectors.kafka.FlinkKafkaConsumer.getPartitionsForTopic(FlinkKafkaConsumer.java:691)	at org.apache.flink.streaming.connectors.kafka.FlinkKafkaConsumer.(FlinkKafkaConsumer.java:281)	at org.apache.flink.streaming.connectors.kafka.FlinkKafkaConsumer082.(FlinkKafkaConsumer082.java:49)	at com.lmig.datahub.heka.Main.main(Main.java:39)	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:497)	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)