Can you provide a bit more information such as: release of Spark you use snippet of your SparkSQL query
Thanks On Thu, Jul 16, 2015 at 5:31 AM, nipun <ibnipu...@gmail.com> wrote: > I have a dataframe. I register it as a temp table and run a spark sql query > on it to get another dataframe. Now when I run groupBy on it, it gives me > this exception > > e: Lost task 1.3 in stage 21.0 (TID 579, 172.28.0.162): > java.lang.ClassCastException: java.lang.String cannot be cast to > org.apache.spark.sql.types.UTF8String > at > > org.apache.spark.sql.execution.SparkSqlSerializer2$$anonfun$createSerializationFunction$1.apply(SparkSqlSerializer2.scala:319) > at > > org.apache.spark.sql.execution.SparkSqlSerializer2$$anonfun$createSerializationFunction$1.apply(SparkSqlSerializer2.scala:212) > at > > org.apache.spark.sql.execution.Serializer2SerializationStream.writeKey(SparkSqlSerializer2.scala:65) > at > > org.apache.spark.storage.DiskBlockObjectWriter.write(BlockObjectWriter.scala:206) > at > > org.apache.spark.util.collection.WritablePartitionedIterator$$anon$3.writeNext(WritablePartitionedPairCollection.scala:104) > at > > org.apache.spark.util.collection.ExternalSorter.spillToPartitionFiles(ExternalSorter.scala:375) > at > > org.apache.spark.util.collection.ExternalSorter.insertAll(ExternalSorter.scala:208) > at > > org.apache.spark.shuffle.sort.SortShuffleWriter.write(SortShuffleWriter.scala:62) > at > org.apache.spark.scheduler.ShuffleMapTask.runTask(ShuffleMapTask.scala:70) > at > org.apache.spark.scheduler.ShuffleMapTask.runTask(ShuffleMapTask.scala:41) > at org.apache.spark.scheduler.Task.run(Task.scala:70) > at > org.apache.spark.executor.Executor$TaskRunner.run(Executor.scala:213) > at > > java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) > > > > -- > View this message in context: > http://apache-spark-developers-list.1001551.n3.nabble.com/Apache-gives-exception-when-running-groupby-on-df-temp-table-tp13275.html > Sent from the Apache Spark Developers List mailing list archive at > Nabble.com. > > --------------------------------------------------------------------- > To unsubscribe, e-mail: dev-unsubscr...@spark.apache.org > For additional commands, e-mail: dev-h...@spark.apache.org > >
