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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 when set PARALLEL_PARTITION_DISCOVERY_THRESHOLD to zero failed #17093

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96898a2
[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) {
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@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

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@windpiger windpiger Mar 1, 2017

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

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@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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6 changes: 4 additions & 2 deletions sql/core/src/main/scala/org/apache/spark/sql/internal/SQLConf.scala
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Expand Up @@ -402,11 +402,13 @@ object SQLConf {

val PARALLEL_PARTITION_DISCOVERY_THRESHOLD =
buildConf("spark.sql.sources.parallelPartitionDiscovery.threshold")
.doc("The maximum number of files allowed for listing files at driver side. If the number " +
"of detected files exceeds this value during partition discovery, it tries to list the " +
.doc("The maximum number of paths allowed for listing files at driver side. If the number " +
"of detected paths exceeds this value during partition discovery, it tries to list the " +
"files with another Spark distributed job. This applies to Parquet, ORC, CSV, JSON and " +
"LibSVM data sources.")
.intConf
.checkValue(parallel => parallel >= 0, "The maximum number of paths allowed for listing " +
"files at driver side must not be negative")
.createWithDefault(32)

val PARALLEL_PARTITION_DISCOVERY_PARALLELISM =
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16 changes: 16 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 @@ -179,6 +180,21 @@ class FileIndexSuite extends SharedSQLContext {
}
}

test("InMemoryFileIndex with empty rootPaths when PARALLEL_PARTITION_DISCOVERY_THRESHOLD" +
"is a nonpositive number") {
withSQLConf(SQLConf.PARALLEL_PARTITION_DISCOVERY_THRESHOLD.key -> "0") {
new InMemoryFileIndex(spark, Seq.empty, Map.empty, None)
}

val e = intercept[IllegalArgumentException] {
withSQLConf(SQLConf.PARALLEL_PARTITION_DISCOVERY_THRESHOLD.key -> "-1") {
new InMemoryFileIndex(spark, Seq.empty, Map.empty, None)
}
}.getMessage
assert(e.contains("The maximum number of paths allowed for listing files at " +
"driver side must not be negative"))
}

test("refresh for InMemoryFileIndex with FileStatusCache") {
withTempDir { dir =>
val fileStatusCache = FileStatusCache.getOrCreate(spark)
Expand Down