Major Description
The following error occurs when I try to run a query with multiple reduce works (M->R->R):
14/08/05 12:17:07 ERROR Executor: Exception in task 0.0 in stage 2.0 (TID 1)
java.lang.RuntimeException: Reduce operator initialization failed
at org.apache.hadoop.hive.ql.exec.mr.ExecReducer.configure(ExecReducer.java:170)
at org.apache.hadoop.hive.ql.exec.spark.HiveReduceFunction.call(HiveReduceFunction.java:53)
at org.apache.hadoop.hive.ql.exec.spark.HiveReduceFunction.call(HiveReduceFunction.java:31)
at org.apache.spark.api.java.JavaRDDLike$$anonfun$fn$7$1.apply(JavaRDDLike.scala:164)
at org.apache.spark.api.java.JavaRDDLike$$anonfun$fn$7$1.apply(JavaRDDLike.scala:164)
at org.apache.spark.rdd.RDD$$anonfun$13.apply(RDD.scala:596)
at org.apache.spark.rdd.RDD$$anonfun$13.apply(RDD.scala:596)
at org.apache.spark.rdd.MapPartitionsRDD.compute(MapPartitionsRDD.scala:35)
at org.apache.spark.rdd.RDD.computeOrReadCheckpoint(RDD.scala:262)
at org.apache.spark.rdd.RDD.iterator(RDD.scala:229)
at org.apache.spark.scheduler.ShuffleMapTask.runTask(ShuffleMapTask.scala:68)
at org.apache.spark.scheduler.ShuffleMapTask.runTask(ShuffleMapTask.scala:41)
at org.apache.spark.scheduler.Task.run(Task.scala:54)
at org.apache.spark.executor.Executor$TaskRunner.run(Executor.scala:199)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:744)
Caused by: java.lang.RuntimeException: cannot find field reducesinkkey0 from [0:_col0]
at org.apache.hadoop.hive.serde2.objectinspector.ObjectInspectorUtils.getStandardStructFieldRef(ObjectInspectorUtils.java:415)
at org.apache.hadoop.hive.serde2.objectinspector.StandardStructObjectInspector.getStructFieldRef(StandardStructObjectInspector.java:147)
…
I suspect we're applying the reduce function in wrong order.
