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This is an automatically generated e-mail. To reply, visit:
https://reviews.apache.org/r/27046/
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(Updated Oct. 23, 2014, 12:42 a.m.)
Review request for hive, Brock Noland and Xuefu Zhang.
Changes
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Thanks Xuefu for the comments. I've changed my patch accordingly.
Bugs: hive-8545
https://issues.apache.org/jira/browse/hive-8545
Repository: hive-git
Description
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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 (updated)
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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
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Thanks,
Chao Sun
