GitHub user windpiger opened a pull request:
https://github.com/apache/spark/pull/17093
[SPARK-19761][SQL]create InMemoryFileIndex with an empty rootPaths when set
PARALLEL_PARTITION_DISCOVERY_THRESHOLD to zero failed
## What changes were proposed in this pull request?
If we create a InMemoryFileIndex with an empty rootPaths when set
PARALLEL_PARTITION_DISCOVERY_THRESHOLD to zero, it will throw an exception:
```
Positive number of slices required
java.lang.IllegalArgumentException: Positive number of slices required
at
org.apache.spark.rdd.ParallelCollectionRDD$.slice(ParallelCollectionRDD.scala:119)
at
org.apache.spark.rdd.ParallelCollectionRDD.getPartitions(ParallelCollectionRDD.scala:97)
at
org.apache.spark.rdd.RDD$$anonfun$partitions$2.apply(RDD.scala:252)
at
org.apache.spark.rdd.RDD$$anonfun$partitions$2.apply(RDD.scala:250)
at scala.Option.getOrElse(Option.scala:121)
at org.apache.spark.rdd.RDD.partitions(RDD.scala:250)
at
org.apache.spark.rdd.MapPartitionsRDD.getPartitions(MapPartitionsRDD.scala:35)
at
org.apache.spark.rdd.RDD$$anonfun$partitions$2.apply(RDD.scala:252)
at
org.apache.spark.rdd.RDD$$anonfun$partitions$2.apply(RDD.scala:250)
at scala.Option.getOrElse(Option.scala:121)
at org.apache.spark.rdd.RDD.partitions(RDD.scala:250)
at
org.apache.spark.rdd.MapPartitionsRDD.getPartitions(MapPartitionsRDD.scala:35)
at
org.apache.spark.rdd.RDD$$anonfun$partitions$2.apply(RDD.scala:252)
at
org.apache.spark.rdd.RDD$$anonfun$partitions$2.apply(RDD.scala:250)
at scala.Option.getOrElse(Option.scala:121)
at org.apache.spark.rdd.RDD.partitions(RDD.scala:250)
at org.apache.spark.SparkContext.runJob(SparkContext.scala:2084)
at org.apache.spark.rdd.RDD$$anonfun$collect$1.apply(RDD.scala:936)
at
org.apache.spark.rdd.RDDOperationScope$.withScope(RDDOperationScope.scala:151)
at
org.apache.spark.rdd.RDDOperationScope$.withScope(RDDOperationScope.scala:112)
at org.apache.spark.rdd.RDD.withScope(RDD.scala:362)
at org.apache.spark.rdd.RDD.collect(RDD.scala:935)
at
org.apache.spark.sql.execution.datasources.PartitioningAwareFileIndex$.org$apache$spark$sql$execution$datasources$PartitioningAwareFileIndex$$bulkListLeafFiles(PartitioningAwareFileIndex.scala:357)
at
org.apache.spark.sql.execution.datasources.PartitioningAwareFileIndex.listLeafFiles(PartitioningAwareFileIndex.scala:256)
at
org.apache.spark.sql.execution.datasources.InMemoryFileIndex.refresh0(InMemoryFileIndex.scala:74)
at
org.apache.spark.sql.execution.datasources.InMemoryFileIndex.<init>(InMemoryFileIndex.scala:50)
at
org.apache.spark.sql.execution.datasources.FileIndexSuite$$anonfun$9$$anonfun$apply$mcV$sp$2.apply$mcV$sp(FileIndexSuite.scala:186)
at
org.apache.spark.sql.test.SQLTestUtils$class.withSQLConf(SQLTestUtils.scala:105)
at
org.apache.spark.sql.execution.datasources.FileIndexSuite.withSQLConf(FileIndexSuite.scala:33)
at
org.apache.spark.sql.execution.datasources.FileIndexSuite$$anonfun$9.apply$mcV$sp(FileIndexSuite.scala:185)
at
org.apache.spark.sql.execution.datasources.FileIndexSuite$$anonfun$9.apply(FileIndexSuite.scala:185)
at
org.apache.spark.sql.execution.datasources.FileIndexSuite$$anonfun$9.apply(FileIndexSuite.scala:185)
at
org.scalatest.Transformer$$anonfun$apply$1.apply$mcV$sp(Transformer.scala:22)
at org.scalatest.OutcomeOf$class.outcomeOf(OutcomeOf.scala:85)
```
## How was this patch tested?
unit test added
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/windpiger/spark fixEmptiPathInBulkListFiles
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/17093.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #17093
----
commit 96898a2332c64b101efc54d1ccbbf29102b88e68
Author: windpiger <[email protected]>
Date: 2017-02-28T02:21:29Z
[SPARK-19761][SQL]create InMemoryFileIndex with an empty rootPaths when set
PARALLEL_PARTITION_DISCOVERY_THRESHOLD to zero failed
----
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