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ql/src/java/org/apache/hadoop/hive/ql/exec/spark/MapInput.java <https://reviews.apache.org/r/27046/#comment98873> This assertion is incorrect. It seems that we don't need toCache at all. Patch #5 fixes all these. - Xuefu Zhang On Oct. 23, 2014, 12:42 a.m., Chao Sun wrote: > > ----------------------------------------------------------- > This is an automatically generated e-mail. To reply, visit: > https://reviews.apache.org/r/27046/ > ----------------------------------------------------------- > > (Updated Oct. 23, 2014, 12:42 a.m.) > > > Review request for hive, Brock Noland and Xuefu Zhang. > > > Bugs: hive-8545 > https://issues.apache.org/jira/browse/hive-8545 > > > Repository: hive-git > > > Description > ------- > > With the current multi-insertion implementation, when caching is enabled for > input RDD, query may fail with the following exception: > 2014-10-21 13:57:34,742 WARN [task-result-getter-0]: > scheduler.TaskSetManager (Logging.scala:logWarning(71)) - Lost task 0.0 in > stage 1.0 (TID 1, localhost): java.lang.ClassCastException: > org.apache.hadoop.io.Text cannot be cast to org.apache.hadoop.io.BytesWritable > > org.apache.hadoop.hive.ql.exec.spark.MapInput$CopyFunction.call(MapInput.java:67) > > org.apache.hadoop.hive.ql.exec.spark.MapInput$CopyFunction.call(MapInput.java:61) > > org.apache.spark.api.java.JavaPairRDD$$anonfun$pairFunToScalaFun$1.apply(JavaPairRDD.scala:1002) > > org.apache.spark.api.java.JavaPairRDD$$anonfun$pairFunToScalaFun$1.apply(JavaPairRDD.scala:1002) > scala.collection.Iterator$$anon$11.next(Iterator.scala:328) > > org.apache.spark.storage.MemoryStore.unrollSafely(MemoryStore.scala:234) > > org.apache.spark.CacheManager.putInBlockManager(CacheManager.scala:163) > org.apache.spark.CacheManager.getOrCompute(CacheManager.scala:70) > org.apache.spark.rdd.RDD.iterator(RDD.scala:227) > > org.apache.spark.rdd.MapPartitionsRDD.compute(MapPartitionsRDD.scala:35) > org.apache.spark.rdd.RDD.computeOrReadCheckpoint(RDD.scala:262) > org.apache.spark.rdd.RDD.iterator(RDD.scala:229) > > org.apache.spark.scheduler.ShuffleMapTask.runTask(ShuffleMapTask.scala:68) > > org.apache.spark.scheduler.ShuffleMapTask.runTask(ShuffleMapTask.scala:41) > org.apache.spark.scheduler.Task.run(Task.scala:56) > org.apache.spark.executor.Executor$TaskRunner.run(Executor.scala:181) > > java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) > > java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) > java.lang.Thread.run(Thread.java:745) > The fix should be easy. However, interestingly, this error doesn't show up > when the caching is turned off. We need to find out why. > > > Diffs > ----- > > > ql/src/java/org/apache/hadoop/hive/ql/exec/spark/HiveBaseFunctionResultList.java > dc5d148 > ql/src/java/org/apache/hadoop/hive/ql/exec/spark/HiveCopyFunction.java > PRE-CREATION > ql/src/java/org/apache/hadoop/hive/ql/exec/spark/MapInput.java 9849b49 > ql/src/java/org/apache/hadoop/hive/ql/exec/spark/SparkPlanGenerator.java > 25a4515 > ql/src/java/org/apache/hadoop/hive/ql/exec/spark/SparkTran.java 8a3dbf2 > ql/src/java/org/apache/hadoop/hive/ql/exec/spark/SparkUtilities.java > 0f21b46 > > Diff: https://reviews.apache.org/r/27046/diff/ > > > Testing > ------- > > > Thanks, > > Chao Sun > >
