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[SPARK-22950][SQL]Handle ChildFirstURLClassLoader's parent #20145

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[SPARK-22950][SQL]Handle ChildFirstURLClassLoader's parent #20145

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7cb0c44
child first classpath first has no regular parent
yaooqinn Jan 4, 2018
bb27e17
doc
yaooqinn Jan 4, 2018
e1a9f2e
surround with try finally
yaooqinn Jan 4, 2018
fea2490
rm one unit test
yaooqinn Jan 4, 2018
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4 changes: 3 additions & 1 deletion sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveUtils.scala
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Original file line number Diff line number Diff line change
Expand Up @@ -47,7 +47,7 @@ import org.apache.spark.sql.internal.SQLConf
import org.apache.spark.sql.internal.SQLConf._
import org.apache.spark.sql.internal.StaticSQLConf.{CATALOG_IMPLEMENTATION, WAREHOUSE_PATH}
import org.apache.spark.sql.types._
import org.apache.spark.util.Utils
import org.apache.spark.util.{ChildFirstURLClassLoader, Utils}


private[spark] object HiveUtils extends Logging {
Expand Down Expand Up @@ -312,6 +312,8 @@ private[spark] object HiveUtils extends Logging {
// starting from the given classLoader.
def allJars(classLoader: ClassLoader): Array[URL] = classLoader match {
case null => Array.empty[URL]
case childFirst: ChildFirstURLClassLoader =>
childFirst.getURLs() ++ allJars(Utils.getSparkClassLoader)
case urlClassLoader: URLClassLoader =>
urlClassLoader.getURLs ++ allJars(urlClassLoader.getParent)
case other => allJars(other.getParent)
Expand Down
20 changes: 20 additions & 0 deletions sql/hive/src/test/scala/org/apache/spark/sql/hive/HiveUtilsSuite.scala
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Original file line number Diff line number Diff line change
Expand Up @@ -17,11 +17,16 @@

package org.apache.spark.sql.hive

import java.net.URL

import org.apache.hadoop.hive.conf.HiveConf.ConfVars

import org.apache.spark.SparkConf
import org.apache.spark.deploy.SparkHadoopUtil
import org.apache.spark.sql.QueryTest
import org.apache.spark.sql.hive.test.TestHiveSingleton
import org.apache.spark.sql.test.SQLTestUtils
import org.apache.spark.util.{ChildFirstURLClassLoader, MutableURLClassLoader}

class HiveUtilsSuite extends QueryTest with SQLTestUtils with TestHiveSingleton {

Expand All @@ -42,4 +47,19 @@ class HiveUtilsSuite extends QueryTest with SQLTestUtils with TestHiveSingleton
assert(hiveConf("foo") === "bar")
}
}

test("ChildFirstURLClassLoader's parent is null, get spark classloader instead") {
val conf = new SparkConf
val contextClassLoader = Thread.currentThread().getContextClassLoader
val loader = new ChildFirstURLClassLoader(Array(), contextClassLoader)
try {
Thread.currentThread().setContextClassLoader(loader)
HiveUtils.newClientForMetadata(
conf,
SparkHadoopUtil.newConfiguration(conf),
HiveUtils.newTemporaryConfiguration(useInMemoryDerby = true))
} finally {
Thread.currentThread().setContextClassLoader(contextClassLoader)
}
}
}