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https://issues.apache.org/jira/browse/SPARK-10304?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14723851#comment-14723851
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Zhan Zhang commented on SPARK-10304:
------------------------------------
[~yhuai] I tried to reproduce the problem with the same directory structure
(table is saved in /tmp/table/peoplePartitioned), but didn't hit the problem.
val table = sqlContext.read.format("orc").load("/tmp/table")
table.registerTempTable("table")
sqlContext.sql("SELECT * FROM table WHERE age = 19").show
sqlContext.sql("SELECT * FROM table").show
val table = sqlContext.read.format("orc").load("/tmp/table/peoplePartitioned")
table.registerTempTable("table")
sqlContext.sql("SELECT * FROM table WHERE age = 19").show
sqlContext.sql("SELECT * FROM table").show
I went through the partition parsing code, which is parsing the leaf directory,
and thus starting point does not matter , and both /tmp/table and
/tmp/table/peoplePartitioned are valid directory as long as it only have the
files from the same orc table.
Does your /tmp/table have some extra files not belonging to the same table? If
not, can you please provide exact reproducing steps?
cc [~lian cheng]
> Partition discovery does not throw an exception if the dir structure is valid
> -----------------------------------------------------------------------------
>
> Key: SPARK-10304
> URL: https://issues.apache.org/jira/browse/SPARK-10304
> Project: Spark
> Issue Type: Bug
> Components: SQL
> Reporter: Yin Huai
> Assignee: Zhan Zhang
> Priority: Critical
>
> I have a dir structure like {{/path/table1/partition_column=1/}}. When I try
> to use {{load("/path/")}}, it works and I get a DF. When I query this DF, if
> it is stored as ORC, there will be the following NPE. But, if it is Parquet,
> we even can return rows. We should complain to users about the dir struct
> because {{table1}} does not meet our format.
> {code}
> org.apache.spark.SparkException: Job aborted due to stage failure: Task 26 in
> stage 57.0 failed 4 times, most recent failure: Lost task 26.3 in stage 57.0
> (TID 3504, 10.0.195.227): java.lang.NullPointerException
> at
> org.apache.spark.sql.hive.HiveInspectors$class.unwrapperFor(HiveInspectors.scala:466)
> at
> org.apache.spark.sql.hive.orc.OrcTableScan.unwrapperFor(OrcRelation.scala:224)
> at
> org.apache.spark.sql.hive.orc.OrcTableScan$$anonfun$org$apache$spark$sql$hive$orc$OrcTableScan$$fillObject$1$$anonfun$9.apply(OrcRelation.scala:261)
> at
> org.apache.spark.sql.hive.orc.OrcTableScan$$anonfun$org$apache$spark$sql$hive$orc$OrcTableScan$$fillObject$1$$anonfun$9.apply(OrcRelation.scala:261)
> at
> scala.collection.TraversableLike$$anonfun$map$1.apply(TraversableLike.scala:244)
> at
> scala.collection.TraversableLike$$anonfun$map$1.apply(TraversableLike.scala:244)
> at scala.collection.immutable.List.foreach(List.scala:318)
> at scala.collection.TraversableLike$class.map(TraversableLike.scala:244)
> at scala.collection.AbstractTraversable.map(Traversable.scala:105)
> at
> org.apache.spark.sql.hive.orc.OrcTableScan$$anonfun$org$apache$spark$sql$hive$orc$OrcTableScan$$fillObject$1.apply(OrcRelation.scala:261)
> at
> org.apache.spark.sql.hive.orc.OrcTableScan$$anonfun$org$apache$spark$sql$hive$orc$OrcTableScan$$fillObject$1.apply(OrcRelation.scala:256)
> at scala.Option.map(Option.scala:145)
> at
> org.apache.spark.sql.hive.orc.OrcTableScan.org$apache$spark$sql$hive$orc$OrcTableScan$$fillObject(OrcRelation.scala:256)
> at
> org.apache.spark.sql.hive.orc.OrcTableScan$$anonfun$execute$3.apply(OrcRelation.scala:318)
> at
> org.apache.spark.sql.hive.orc.OrcTableScan$$anonfun$execute$3.apply(OrcRelation.scala:316)
> at
> org.apache.spark.rdd.HadoopRDD$HadoopMapPartitionsWithSplitRDD.compute(HadoopRDD.scala:380)
> at org.apache.spark.rdd.RDD.computeOrReadCheckpoint(RDD.scala:297)
> at org.apache.spark.rdd.RDD.iterator(RDD.scala:264)
> at
> org.apache.spark.rdd.MapPartitionsRDD.compute(MapPartitionsRDD.scala:38)
> at org.apache.spark.rdd.RDD.computeOrReadCheckpoint(RDD.scala:297)
> at org.apache.spark.rdd.RDD.iterator(RDD.scala:264)
> at
> org.apache.spark.rdd.MapPartitionsRDD.compute(MapPartitionsRDD.scala:38)
> {code}
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