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Posted to commits@spark.apache.org by jo...@apache.org on 2014/12/30 18:30:07 UTC
spark git commit: [SPARK-4882] Register PythonBroadcast with Kryo so
that PySpark works with KryoSerializer
Repository: spark
Updated Branches:
refs/heads/master 9077e721c -> efa80a531
[SPARK-4882] Register PythonBroadcast with Kryo so that PySpark works with KryoSerializer
This PR fixes an issue where PySpark broadcast variables caused NullPointerExceptions if KryoSerializer was used. The fix is to register PythonBroadcast with Kryo so that it's deserialized with a KryoJavaSerializer.
Author: Josh Rosen <jo...@databricks.com>
Closes #3831 from JoshRosen/SPARK-4882 and squashes the following commits:
0466c7a [Josh Rosen] Register PythonBroadcast with Kryo.
d5b409f [Josh Rosen] Enable registrationRequired, which would have caught this bug.
069d8a7 [Josh Rosen] Add failing test for SPARK-4882
Project: http://git-wip-us.apache.org/repos/asf/spark/repo
Commit: http://git-wip-us.apache.org/repos/asf/spark/commit/efa80a53
Tree: http://git-wip-us.apache.org/repos/asf/spark/tree/efa80a53
Diff: http://git-wip-us.apache.org/repos/asf/spark/diff/efa80a53
Branch: refs/heads/master
Commit: efa80a531ecd485f6cf0cdc24ffa42ba17eea46d
Parents: 9077e72
Author: Josh Rosen <jo...@databricks.com>
Authored: Tue Dec 30 09:29:52 2014 -0800
Committer: Josh Rosen <jo...@databricks.com>
Committed: Tue Dec 30 09:29:52 2014 -0800
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.../spark/serializer/KryoSerializer.scala | 2 +
.../spark/api/python/PythonBroadcastSuite.scala | 60 ++++++++++++++++++++
2 files changed, 62 insertions(+)
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http://git-wip-us.apache.org/repos/asf/spark/blob/efa80a53/core/src/main/scala/org/apache/spark/serializer/KryoSerializer.scala
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diff --git a/core/src/main/scala/org/apache/spark/serializer/KryoSerializer.scala b/core/src/main/scala/org/apache/spark/serializer/KryoSerializer.scala
index 621a951..d2947dc 100644
--- a/core/src/main/scala/org/apache/spark/serializer/KryoSerializer.scala
+++ b/core/src/main/scala/org/apache/spark/serializer/KryoSerializer.scala
@@ -26,6 +26,7 @@ import com.esotericsoftware.kryo.serializers.{JavaSerializer => KryoJavaSerializ
import com.twitter.chill.{AllScalaRegistrar, EmptyScalaKryoInstantiator}
import org.apache.spark._
+import org.apache.spark.api.python.PythonBroadcast
import org.apache.spark.broadcast.HttpBroadcast
import org.apache.spark.network.nio.{PutBlock, GotBlock, GetBlock}
import org.apache.spark.scheduler.MapStatus
@@ -90,6 +91,7 @@ class KryoSerializer(conf: SparkConf)
// Allow sending SerializableWritable
kryo.register(classOf[SerializableWritable[_]], new KryoJavaSerializer())
kryo.register(classOf[HttpBroadcast[_]], new KryoJavaSerializer())
+ kryo.register(classOf[PythonBroadcast], new KryoJavaSerializer())
try {
// Use the default classloader when calling the user registrator.
http://git-wip-us.apache.org/repos/asf/spark/blob/efa80a53/core/src/test/scala/org/apache/spark/api/python/PythonBroadcastSuite.scala
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diff --git a/core/src/test/scala/org/apache/spark/api/python/PythonBroadcastSuite.scala b/core/src/test/scala/org/apache/spark/api/python/PythonBroadcastSuite.scala
new file mode 100644
index 0000000..8959a84
--- /dev/null
+++ b/core/src/test/scala/org/apache/spark/api/python/PythonBroadcastSuite.scala
@@ -0,0 +1,60 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.api.python
+
+import scala.io.Source
+
+import java.io.{PrintWriter, File}
+
+import org.scalatest.{Matchers, FunSuite}
+
+import org.apache.spark.{SharedSparkContext, SparkConf}
+import org.apache.spark.serializer.KryoSerializer
+import org.apache.spark.util.Utils
+
+// This test suite uses SharedSparkContext because we need a SparkEnv in order to deserialize
+// a PythonBroadcast:
+class PythonBroadcastSuite extends FunSuite with Matchers with SharedSparkContext {
+ test("PythonBroadcast can be serialized with Kryo (SPARK-4882)") {
+ val tempDir = Utils.createTempDir()
+ val broadcastedString = "Hello, world!"
+ def assertBroadcastIsValid(broadcast: PythonBroadcast): Unit = {
+ val source = Source.fromFile(broadcast.path)
+ val contents = source.mkString
+ source.close()
+ contents should be (broadcastedString)
+ }
+ try {
+ val broadcastDataFile: File = {
+ val file = new File(tempDir, "broadcastData")
+ val printWriter = new PrintWriter(file)
+ printWriter.write(broadcastedString)
+ printWriter.close()
+ file
+ }
+ val broadcast = new PythonBroadcast(broadcastDataFile.getAbsolutePath)
+ assertBroadcastIsValid(broadcast)
+ val conf = new SparkConf().set("spark.kryo.registrationRequired", "true")
+ val deserializedBroadcast =
+ Utils.clone[PythonBroadcast](broadcast, new KryoSerializer(conf).newInstance())
+ assertBroadcastIsValid(deserializedBroadcast)
+ } finally {
+ Utils.deleteRecursively(tempDir)
+ }
+ }
+}
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