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com.datastax.driver.core.exceptions.InvalidQueryException: Key may not be empty
java.util.concurrent.ExecutionException: com.datastax.driver.core.exceptions.InvalidQueryException: Key may not be empty at com.baynote.shaded.com.google.common.util.concurrent.AbstractFuture$Sync.getValue(AbstractFuture.java:299) at com.baynote.shaded.com.google.common.util.concurrent.AbstractFuture$Sync.get(AbstractFuture.java:286) at com.baynote.shaded.com.google.common.util.concurrent.AbstractFuture.get(AbstractFuture.java:116) at com.datastax.spark.connector.rdd.CassandraJoinRDD$$anonfun$fetchIterator$1.apply(CassandraJoinRDD.scala:268) at com.datastax.spark.connector.rdd.CassandraJoinRDD$$anonfun$fetchIterator$1.apply(CassandraJoinRDD.scala:268) at scala.collection.Iterator$$anon$13.hasNext(Iterator.scala:371) at com.datastax.spark.connector.util.CountingIterator.hasNext(CountingIterator.scala:12) at scala.collection.Iterator$$anon$13.hasNext(Iterator.scala:371) at org.apache.spark.util.collection.ExternalSorter.insertAll(ExternalSorter.scala:189) at org.apache.spark.shuffle.sort.SortShuffleWriter.write(SortShuffleWriter.scala:64) at org.apache.spark.scheduler.ShuffleMapTask.runTask(ShuffleMapTask.scala:73) at org.apache.spark.scheduler.ShuffleMapTask.runTask(ShuffleMapTask.scala:41) at org.apache.spark.scheduler.Task.run(Task.scala:89) at org.apache.spark.executor.Executor$TaskRunner.run(Executor.scala:213) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) at java.lang.Thread.run(Thread.java:745)Caused by: com.datastax.driver.core.exceptions.InvalidQueryException: Key may not be empty at com.datastax.driver.core.Responses$Error.asException(Responses.java:136) at com.datastax.driver.core.DefaultResultSetFuture.onSet(DefaultResultSetFuture.java:179) at com.datastax.driver.core.RequestHandler.setFinalResult(RequestHandler.java:184) at com.datastax.driver.core.RequestHandler.access$2500(RequestHandler.java:43) at com.datastax.driver.core.RequestHandler$SpeculativeExecution.setFinalResult(RequestHandler.java:798) at com.datastax.driver.core.RequestHandler$SpeculativeExecution.onSet(RequestHandler.java:617) at com.datastax.driver.core.Connection$Dispatcher.channelRead0(Connection.java:1005) at com.datastax.driver.core.Connection$Dispatcher.channelRead0(Connection.java:928) at io.netty.channel.SimpleChannelInboundHandler.channelRead(SimpleChannelInboundHandler.java:105) at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:308) at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:294) at io.netty.handler.timeout.IdleStateHandler.channelRead(IdleStateHandler.java:266) at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:308) at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:294) at io.netty.handler.codec.MessageToMessageDecoder.channelRead(MessageToMessageDecoder.java:103) at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:308) at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:294) at io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:244) at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:308) at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:294) at io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:846) at io.netty.channel.epoll.AbstractEpollStreamChannel$EpollStreamUnsafe.epollInReady(AbstractEpollStreamChannel.java:831) at io.netty.channel.epoll.EpollEventLoop.processReady(EpollEventLoop.java:346) at io.netty.channel.epoll.EpollEventLoop.run(EpollEventLoop.java:254) at io.netty.util.concurrent.SingleThreadEventExecutor$2.run(SingleThreadEventExecutor.java:111) ... 1 more