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[SPARK-19761][SQL]create InMemoryFileIndex with an empty rootPaths when set PARALLEL_PARTITION_DISCOVERY_THRESHOLD to zero failed #17093

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windpiger wants to merge 9 commits into from
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[SPARK-19761][SQL]create InMemoryFileIndex with an empty rootPaths when set PARALLEL_PARTITION_DISCOVERY_THRESHOLD to zero failed #17093

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[SPARK-19761][SQL]create InMemoryFileIndex with an empty rootPaths wh…
windpiger Feb 28, 2017
a3ac29b
cover the negtive number situation
windpiger Feb 28, 2017
ec0afac
merge with master
windpiger Feb 28, 2017
13b70f0
add checkValue for the conf
windpiger Mar 1, 2017
1cb997c
fix comments
windpiger Mar 1, 2017
0d2334d
fix comments
windpiger Mar 1, 2017
74d08a5
modify test case
windpiger Mar 1, 2017
e1a9072
modify a test name
windpiger Mar 1, 2017
3c079ff
modify a style
windpiger Mar 1, 2017
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2 changes: 1 addition & 1 deletion ...rc/main/scala/org/apache/spark/sql/execution/datasources/PartitioningAwareFileIndex.scala
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Expand Up @@ -300,7 +300,7 @@ object PartitioningAwareFileIndex extends Logging {
sparkSession: SparkSession): Seq[(Path, Seq[FileStatus])] = {

// Short-circuits parallel listing when serial listing is likely to be faster.
if (paths.size < sparkSession.sessionState.conf.parallelPartitionDiscoveryThreshold) {
if (paths.size <= sparkSession.sessionState.conf.parallelPartitionDiscoveryThreshold) {

@cloud-fan cloud-fan Feb 28, 2017

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why not we just make sure parallelPartitionDiscoveryThreshold is greater than 0? We can add a condition(via checkValue) in SQLConf.PARALLEL_PARTITION_DISCOVERY_THRESHOLD

@windpiger windpiger Mar 1, 2017

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sorry, I didn't notice there is a checkValue func, let me fix it. thanks!

@windpiger windpiger Mar 1, 2017

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add equal is more clear to understand the conf parallelPartitionDiscoveryThreshold

return paths.map { path =>
(path, listLeafFiles(path, hadoopConf, filter, Some(sparkSession)))
}
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7 changes: 7 additions & 0 deletions sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/FileIndexSuite.scala
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Expand Up @@ -27,6 +27,7 @@ import org.apache.hadoop.fs.{FileStatus, Path, RawLocalFileSystem}

import org.apache.spark.metrics.source.HiveCatalogMetrics
import org.apache.spark.sql.catalyst.util._
import org.apache.spark.sql.internal.SQLConf
import org.apache.spark.sql.test.SharedSQLContext

class FileIndexSuite extends SharedSQLContext {
Expand Down Expand Up @@ -178,6 +179,12 @@ class FileIndexSuite extends SharedSQLContext {
assert(catalog2.allFiles().nonEmpty)
}
}

test("InMemoryFileIndex with empty rootPaths when PARALLEL_PARTITION_DISCOVERY_THRESHOLD is 0") {

@gatorsmile gatorsmile Feb 28, 2017

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After this fix, when users setting it to -1, we still face the same strange error. We need a complete fix.

@windpiger windpiger Feb 28, 2017 •
edited
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I think the user should not set it to a negative number initiatively, if they set it , throw exception is reasonable

withSQLConf(SQLConf.PARALLEL_PARTITION_DISCOVERY_THRESHOLD.key -> "0") {
new InMemoryFileIndex(spark, Seq.empty, Map.empty, None)
}
}
}

class FakeParentPathFileSystem extends RawLocalFileSystem {
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