Repository: spark
Updated Branches:
refs/heads/master c764d0ac1 -> 300887bd7
[SPARK-3649] Remove GraphX custom serializers
As [reported][1] on the mailing list, GraphX throws
```
java.lang.ClassCastException: java.lang.Long cannot be cast to scala.Tuple2
at
org.apache.spark.graphx.impl.RoutingTableMessageSerializer$$anon$1$$anon$2.writeObject(Serializers.scala:39)
at
org.apache.spark.storage.DiskBlockObjectWriter.write(BlockObjectWriter.scala:195)
at
org.apache.spark.util.collection.ExternalSorter.spillToMergeableFile(ExternalSorter.scala:329)
```
when sort-based shuffle attempts to spill to disk. This is because GraphX
defines custom serializers for shuffling pair RDDs that assume Spark will
always serialize the entire pair object rather than breaking it up into its
components. However, the spill code path in sort-based shuffle [violates this
assumption][2].
GraphX uses the custom serializers to compress vertex ID keys using
variable-length integer encoding. However, since the serializer can no longer
rely on the key and value being serialized and deserialized together,
performing such encoding would either require writing a tag byte (costly) or
maintaining state in the serializer and assuming that serialization calls will
alternate between key and value (fragile).
Instead, this PR simply removes the custom serializers. This causes a **10%
slowdown** (494 s to 543 s) and **16% increase in per-iteration communication**
(2176 MB to 2518 MB) for PageRank (averages across 3 trials, 10 iterations per
trial, uk-2007-05 graph, 16 r3.2xlarge nodes).
[1]:
http://apache-spark-user-list.1001560.n3.nabble.com/java-lang-ClassCastException-java-lang-Long-cannot-be-cast-to-scala-Tuple2-td13926.html#a14501
[2]:
https://github.com/apache/spark/blob/f9d6220c792b779be385f3022d146911a22c2130/core/src/main/scala/org/apache/spark/util/collection/ExternalSorter.scala#L329
Author: Ankur Dave <ankurd...@gmail.com>
Closes #2503 from ankurdave/SPARK-3649 and squashes the following commits:
a49c2ad [Ankur Dave] [SPARK-3649] Remove GraphX custom serializers
Project: http://git-wip-us.apache.org/repos/asf/spark/repo
Commit: http://git-wip-us.apache.org/repos/asf/spark/commit/300887bd
Tree: http://git-wip-us.apache.org/repos/asf/spark/tree/300887bd
Diff: http://git-wip-us.apache.org/repos/asf/spark/diff/300887bd
Branch: refs/heads/master
Commit: 300887bd76c5018bfe396c5d47443be251368359
Parents: c764d0a
Author: Ankur Dave <ankurd...@gmail.com>
Authored: Mon Nov 10 19:31:52 2014 -0800
Committer: Reynold Xin <r...@databricks.com>
Committed: Mon Nov 10 19:31:52 2014 -0800
----------------------------------------------------------------------
.../org/apache/spark/graphx/VertexRDD.scala | 14 +-
.../spark/graphx/impl/MessageToPartition.scala | 50 ---
.../graphx/impl/RoutingTablePartition.scala | 18 -
.../apache/spark/graphx/impl/Serializers.scala | 369 -------------------
.../apache/spark/graphx/SerializerSuite.scala | 122 ------
5 files changed, 6 insertions(+), 567 deletions(-)
----------------------------------------------------------------------
http://git-wip-us.apache.org/repos/asf/spark/blob/300887bd/graphx/src/main/scala/org/apache/spark/graphx/VertexRDD.scala
----------------------------------------------------------------------
diff --git a/graphx/src/main/scala/org/apache/spark/graphx/VertexRDD.scala
b/graphx/src/main/scala/org/apache/spark/graphx/VertexRDD.scala
index 2c8b245..12216d9 100644
--- a/graphx/src/main/scala/org/apache/spark/graphx/VertexRDD.scala
+++ b/graphx/src/main/scala/org/apache/spark/graphx/VertexRDD.scala
@@ -27,8 +27,6 @@ import org.apache.spark.storage.StorageLevel
import org.apache.spark.graphx.impl.RoutingTablePartition
import org.apache.spark.graphx.impl.ShippableVertexPartition
import org.apache.spark.graphx.impl.VertexAttributeBlock
-import org.apache.spark.graphx.impl.RoutingTableMessageRDDFunctions._
-import org.apache.spark.graphx.impl.VertexRDDFunctions._
/**
* Extends `RDD[(VertexId, VD)]` by ensuring that there is only one entry for
each vertex and by
@@ -233,7 +231,7 @@ class VertexRDD[@specialized VD: ClassTag](
case _ =>
this.withPartitionsRDD[VD3](
partitionsRDD.zipPartitions(
- other.copartitionWithVertices(this.partitioner.get),
preservesPartitioning = true) {
+ other.partitionBy(this.partitioner.get), preservesPartitioning =
true) {
(partIter, msgs) => partIter.map(_.leftJoin(msgs)(f))
}
)
@@ -277,7 +275,7 @@ class VertexRDD[@specialized VD: ClassTag](
case _ =>
this.withPartitionsRDD(
partitionsRDD.zipPartitions(
- other.copartitionWithVertices(this.partitioner.get),
preservesPartitioning = true) {
+ other.partitionBy(this.partitioner.get), preservesPartitioning =
true) {
(partIter, msgs) => partIter.map(_.innerJoin(msgs)(f))
}
)
@@ -297,7 +295,7 @@ class VertexRDD[@specialized VD: ClassTag](
*/
def aggregateUsingIndex[VD2: ClassTag](
messages: RDD[(VertexId, VD2)], reduceFunc: (VD2, VD2) => VD2):
VertexRDD[VD2] = {
- val shuffled = messages.copartitionWithVertices(this.partitioner.get)
+ val shuffled = messages.partitionBy(this.partitioner.get)
val parts = partitionsRDD.zipPartitions(shuffled, true) { (thisIter,
msgIter) =>
thisIter.map(_.aggregateUsingIndex(msgIter, reduceFunc))
}
@@ -371,7 +369,7 @@ object VertexRDD {
def apply[VD: ClassTag](vertices: RDD[(VertexId, VD)]): VertexRDD[VD] = {
val vPartitioned: RDD[(VertexId, VD)] = vertices.partitioner match {
case Some(p) => vertices
- case None => vertices.copartitionWithVertices(new
HashPartitioner(vertices.partitions.size))
+ case None => vertices.partitionBy(new
HashPartitioner(vertices.partitions.size))
}
val vertexPartitions = vPartitioned.mapPartitions(
iter => Iterator(ShippableVertexPartition(iter)),
@@ -412,7 +410,7 @@ object VertexRDD {
): VertexRDD[VD] = {
val vPartitioned: RDD[(VertexId, VD)] = vertices.partitioner match {
case Some(p) => vertices
- case None => vertices.copartitionWithVertices(new
HashPartitioner(vertices.partitions.size))
+ case None => vertices.partitionBy(new
HashPartitioner(vertices.partitions.size))
}
val routingTables = createRoutingTables(edges,
vPartitioned.partitioner.get)
val vertexPartitions = vPartitioned.zipPartitions(routingTables,
preservesPartitioning = true) {
@@ -454,7 +452,7 @@ object VertexRDD {
.setName("VertexRDD.createRoutingTables - vid2pid (aggregation)")
val numEdgePartitions = edges.partitions.size
- vid2pid.copartitionWithVertices(vertexPartitioner).mapPartitions(
+ vid2pid.partitionBy(vertexPartitioner).mapPartitions(
iter => Iterator(RoutingTablePartition.fromMsgs(numEdgePartitions,
iter)),
preservesPartitioning = true)
}
http://git-wip-us.apache.org/repos/asf/spark/blob/300887bd/graphx/src/main/scala/org/apache/spark/graphx/impl/MessageToPartition.scala
----------------------------------------------------------------------
diff --git
a/graphx/src/main/scala/org/apache/spark/graphx/impl/MessageToPartition.scala
b/graphx/src/main/scala/org/apache/spark/graphx/impl/MessageToPartition.scala
deleted file mode 100644
index 714f3b8..0000000
---
a/graphx/src/main/scala/org/apache/spark/graphx/impl/MessageToPartition.scala
+++ /dev/null
@@ -1,50 +0,0 @@
-/*
- * 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.graphx.impl
-
-import scala.language.implicitConversions
-import scala.reflect.{classTag, ClassTag}
-
-import org.apache.spark.Partitioner
-import org.apache.spark.graphx.{PartitionID, VertexId}
-import org.apache.spark.rdd.{ShuffledRDD, RDD}
-
-
-private[graphx]
-class VertexRDDFunctions[VD: ClassTag](self: RDD[(VertexId, VD)]) {
- def copartitionWithVertices(partitioner: Partitioner): RDD[(VertexId, VD)] =
{
- val rdd = new ShuffledRDD[VertexId, VD, VD](self, partitioner)
-
- // Set a custom serializer if the data is of int or double type.
- if (classTag[VD] == ClassTag.Int) {
- rdd.setSerializer(new IntAggMsgSerializer)
- } else if (classTag[VD] == ClassTag.Long) {
- rdd.setSerializer(new LongAggMsgSerializer)
- } else if (classTag[VD] == ClassTag.Double) {
- rdd.setSerializer(new DoubleAggMsgSerializer)
- }
- rdd
- }
-}
-
-private[graphx]
-object VertexRDDFunctions {
- implicit def rdd2VertexRDDFunctions[VD: ClassTag](rdd: RDD[(VertexId, VD)])
= {
- new VertexRDDFunctions(rdd)
- }
-}
http://git-wip-us.apache.org/repos/asf/spark/blob/300887bd/graphx/src/main/scala/org/apache/spark/graphx/impl/RoutingTablePartition.scala
----------------------------------------------------------------------
diff --git
a/graphx/src/main/scala/org/apache/spark/graphx/impl/RoutingTablePartition.scala
b/graphx/src/main/scala/org/apache/spark/graphx/impl/RoutingTablePartition.scala
index b274859..7a7fa91 100644
---
a/graphx/src/main/scala/org/apache/spark/graphx/impl/RoutingTablePartition.scala
+++
b/graphx/src/main/scala/org/apache/spark/graphx/impl/RoutingTablePartition.scala
@@ -30,24 +30,6 @@ import
org.apache.spark.graphx.util.collection.GraphXPrimitiveKeyOpenHashMap
import org.apache.spark.graphx.impl.RoutingTablePartition.RoutingTableMessage
private[graphx]
-class RoutingTableMessageRDDFunctions(self: RDD[RoutingTableMessage]) {
- /** Copartition an `RDD[RoutingTableMessage]` with the vertex RDD with the
given `partitioner`. */
- def copartitionWithVertices(partitioner: Partitioner):
RDD[RoutingTableMessage] = {
- new ShuffledRDD[VertexId, Int, Int](
- self, partitioner).setSerializer(new RoutingTableMessageSerializer)
- }
-}
-
-private[graphx]
-object RoutingTableMessageRDDFunctions {
- import scala.language.implicitConversions
-
- implicit def rdd2RoutingTableMessageRDDFunctions(rdd:
RDD[RoutingTableMessage]) = {
- new RoutingTableMessageRDDFunctions(rdd)
- }
-}
-
-private[graphx]
object RoutingTablePartition {
/**
* A message from an edge partition to a vertex specifying the position in
which the edge
http://git-wip-us.apache.org/repos/asf/spark/blob/300887bd/graphx/src/main/scala/org/apache/spark/graphx/impl/Serializers.scala
----------------------------------------------------------------------
diff --git
a/graphx/src/main/scala/org/apache/spark/graphx/impl/Serializers.scala
b/graphx/src/main/scala/org/apache/spark/graphx/impl/Serializers.scala
deleted file mode 100644
index 3909efc..0000000
--- a/graphx/src/main/scala/org/apache/spark/graphx/impl/Serializers.scala
+++ /dev/null
@@ -1,369 +0,0 @@
-/*
- * 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.graphx.impl
-
-import scala.language.existentials
-
-import java.io.{EOFException, InputStream, OutputStream}
-import java.nio.ByteBuffer
-
-import scala.reflect.ClassTag
-
-import org.apache.spark.serializer._
-
-import org.apache.spark.graphx._
-import org.apache.spark.graphx.impl.RoutingTablePartition.RoutingTableMessage
-
-private[graphx]
-class RoutingTableMessageSerializer extends Serializer with Serializable {
- override def newInstance(): SerializerInstance = new
ShuffleSerializerInstance {
-
- override def serializeStream(s: OutputStream): SerializationStream =
- new ShuffleSerializationStream(s) {
- def writeObject[T: ClassTag](t: T): SerializationStream = {
- val msg = t.asInstanceOf[RoutingTableMessage]
- writeVarLong(msg._1, optimizePositive = false)
- writeInt(msg._2)
- this
- }
- }
-
- override def deserializeStream(s: InputStream): DeserializationStream =
- new ShuffleDeserializationStream(s) {
- override def readObject[T: ClassTag](): T = {
- val a = readVarLong(optimizePositive = false)
- val b = readInt()
- (a, b).asInstanceOf[T]
- }
- }
- }
-}
-
-private[graphx]
-class VertexIdMsgSerializer extends Serializer with Serializable {
- override def newInstance(): SerializerInstance = new
ShuffleSerializerInstance {
-
- override def serializeStream(s: OutputStream) = new
ShuffleSerializationStream(s) {
- def writeObject[T: ClassTag](t: T) = {
- val msg = t.asInstanceOf[(VertexId, _)]
- writeVarLong(msg._1, optimizePositive = false)
- this
- }
- }
-
- override def deserializeStream(s: InputStream) = new
ShuffleDeserializationStream(s) {
- override def readObject[T: ClassTag](): T = {
- (readVarLong(optimizePositive = false), null).asInstanceOf[T]
- }
- }
- }
-}
-
-/** A special shuffle serializer for AggregationMessage[Int]. */
-private[graphx]
-class IntAggMsgSerializer extends Serializer with Serializable {
- override def newInstance(): SerializerInstance = new
ShuffleSerializerInstance {
-
- override def serializeStream(s: OutputStream) = new
ShuffleSerializationStream(s) {
- def writeObject[T: ClassTag](t: T) = {
- val msg = t.asInstanceOf[(VertexId, Int)]
- writeVarLong(msg._1, optimizePositive = false)
- writeUnsignedVarInt(msg._2)
- this
- }
- }
-
- override def deserializeStream(s: InputStream) = new
ShuffleDeserializationStream(s) {
- override def readObject[T: ClassTag](): T = {
- val a = readVarLong(optimizePositive = false)
- val b = readUnsignedVarInt()
- (a, b).asInstanceOf[T]
- }
- }
- }
-}
-
-/** A special shuffle serializer for AggregationMessage[Long]. */
-private[graphx]
-class LongAggMsgSerializer extends Serializer with Serializable {
- override def newInstance(): SerializerInstance = new
ShuffleSerializerInstance {
-
- override def serializeStream(s: OutputStream) = new
ShuffleSerializationStream(s) {
- def writeObject[T: ClassTag](t: T) = {
- val msg = t.asInstanceOf[(VertexId, Long)]
- writeVarLong(msg._1, optimizePositive = false)
- writeVarLong(msg._2, optimizePositive = true)
- this
- }
- }
-
- override def deserializeStream(s: InputStream) = new
ShuffleDeserializationStream(s) {
- override def readObject[T: ClassTag](): T = {
- val a = readVarLong(optimizePositive = false)
- val b = readVarLong(optimizePositive = true)
- (a, b).asInstanceOf[T]
- }
- }
- }
-}
-
-/** A special shuffle serializer for AggregationMessage[Double]. */
-private[graphx]
-class DoubleAggMsgSerializer extends Serializer with Serializable {
- override def newInstance(): SerializerInstance = new
ShuffleSerializerInstance {
-
- override def serializeStream(s: OutputStream) = new
ShuffleSerializationStream(s) {
- def writeObject[T: ClassTag](t: T) = {
- val msg = t.asInstanceOf[(VertexId, Double)]
- writeVarLong(msg._1, optimizePositive = false)
- writeDouble(msg._2)
- this
- }
- }
-
- override def deserializeStream(s: InputStream) = new
ShuffleDeserializationStream(s) {
- def readObject[T: ClassTag](): T = {
- val a = readVarLong(optimizePositive = false)
- val b = readDouble()
- (a, b).asInstanceOf[T]
- }
- }
- }
-}
-
-////////////////////////////////////////////////////////////////////////////////
-// Helper classes to shorten the implementation of those special serializers.
-////////////////////////////////////////////////////////////////////////////////
-
-private[graphx]
-abstract class ShuffleSerializationStream(s: OutputStream) extends
SerializationStream {
- // The implementation should override this one.
- def writeObject[T: ClassTag](t: T): SerializationStream
-
- def writeInt(v: Int) {
- s.write(v >> 24)
- s.write(v >> 16)
- s.write(v >> 8)
- s.write(v)
- }
-
- def writeUnsignedVarInt(value: Int) {
- if ((value >>> 7) == 0) {
- s.write(value.toInt)
- } else if ((value >>> 14) == 0) {
- s.write((value & 0x7F) | 0x80)
- s.write(value >>> 7)
- } else if ((value >>> 21) == 0) {
- s.write((value & 0x7F) | 0x80)
- s.write(value >>> 7 | 0x80)
- s.write(value >>> 14)
- } else if ((value >>> 28) == 0) {
- s.write((value & 0x7F) | 0x80)
- s.write(value >>> 7 | 0x80)
- s.write(value >>> 14 | 0x80)
- s.write(value >>> 21)
- } else {
- s.write((value & 0x7F) | 0x80)
- s.write(value >>> 7 | 0x80)
- s.write(value >>> 14 | 0x80)
- s.write(value >>> 21 | 0x80)
- s.write(value >>> 28)
- }
- }
-
- def writeVarLong(value: Long, optimizePositive: Boolean) {
- val v = if (!optimizePositive) (value << 1) ^ (value >> 63) else value
- if ((v >>> 7) == 0) {
- s.write(v.toInt)
- } else if ((v >>> 14) == 0) {
- s.write(((v & 0x7F) | 0x80).toInt)
- s.write((v >>> 7).toInt)
- } else if ((v >>> 21) == 0) {
- s.write(((v & 0x7F) | 0x80).toInt)
- s.write((v >>> 7 | 0x80).toInt)
- s.write((v >>> 14).toInt)
- } else if ((v >>> 28) == 0) {
- s.write(((v & 0x7F) | 0x80).toInt)
- s.write((v >>> 7 | 0x80).toInt)
- s.write((v >>> 14 | 0x80).toInt)
- s.write((v >>> 21).toInt)
- } else if ((v >>> 35) == 0) {
- s.write(((v & 0x7F) | 0x80).toInt)
- s.write((v >>> 7 | 0x80).toInt)
- s.write((v >>> 14 | 0x80).toInt)
- s.write((v >>> 21 | 0x80).toInt)
- s.write((v >>> 28).toInt)
- } else if ((v >>> 42) == 0) {
- s.write(((v & 0x7F) | 0x80).toInt)
- s.write((v >>> 7 | 0x80).toInt)
- s.write((v >>> 14 | 0x80).toInt)
- s.write((v >>> 21 | 0x80).toInt)
- s.write((v >>> 28 | 0x80).toInt)
- s.write((v >>> 35).toInt)
- } else if ((v >>> 49) == 0) {
- s.write(((v & 0x7F) | 0x80).toInt)
- s.write((v >>> 7 | 0x80).toInt)
- s.write((v >>> 14 | 0x80).toInt)
- s.write((v >>> 21 | 0x80).toInt)
- s.write((v >>> 28 | 0x80).toInt)
- s.write((v >>> 35 | 0x80).toInt)
- s.write((v >>> 42).toInt)
- } else if ((v >>> 56) == 0) {
- s.write(((v & 0x7F) | 0x80).toInt)
- s.write((v >>> 7 | 0x80).toInt)
- s.write((v >>> 14 | 0x80).toInt)
- s.write((v >>> 21 | 0x80).toInt)
- s.write((v >>> 28 | 0x80).toInt)
- s.write((v >>> 35 | 0x80).toInt)
- s.write((v >>> 42 | 0x80).toInt)
- s.write((v >>> 49).toInt)
- } else {
- s.write(((v & 0x7F) | 0x80).toInt)
- s.write((v >>> 7 | 0x80).toInt)
- s.write((v >>> 14 | 0x80).toInt)
- s.write((v >>> 21 | 0x80).toInt)
- s.write((v >>> 28 | 0x80).toInt)
- s.write((v >>> 35 | 0x80).toInt)
- s.write((v >>> 42 | 0x80).toInt)
- s.write((v >>> 49 | 0x80).toInt)
- s.write((v >>> 56).toInt)
- }
- }
-
- def writeLong(v: Long) {
- s.write((v >>> 56).toInt)
- s.write((v >>> 48).toInt)
- s.write((v >>> 40).toInt)
- s.write((v >>> 32).toInt)
- s.write((v >>> 24).toInt)
- s.write((v >>> 16).toInt)
- s.write((v >>> 8).toInt)
- s.write(v.toInt)
- }
-
- def writeDouble(v: Double): Unit =
writeLong(java.lang.Double.doubleToLongBits(v))
-
- override def flush(): Unit = s.flush()
-
- override def close(): Unit = s.close()
-}
-
-private[graphx]
-abstract class ShuffleDeserializationStream(s: InputStream) extends
DeserializationStream {
- // The implementation should override this one.
- def readObject[T: ClassTag](): T
-
- def readInt(): Int = {
- val first = s.read()
- if (first < 0) throw new EOFException
- (first & 0xFF) << 24 | (s.read() & 0xFF) << 16 | (s.read() & 0xFF) << 8 |
(s.read() & 0xFF)
- }
-
- def readUnsignedVarInt(): Int = {
- var value: Int = 0
- var i: Int = 0
- def readOrThrow(): Int = {
- val in = s.read()
- if (in < 0) throw new EOFException
- in & 0xFF
- }
- var b: Int = readOrThrow()
- while ((b & 0x80) != 0) {
- value |= (b & 0x7F) << i
- i += 7
- if (i > 35) throw new IllegalArgumentException("Variable length quantity
is too long")
- b = readOrThrow()
- }
- value | (b << i)
- }
-
- def readVarLong(optimizePositive: Boolean): Long = {
- def readOrThrow(): Int = {
- val in = s.read()
- if (in < 0) throw new EOFException
- in & 0xFF
- }
- var b = readOrThrow()
- var ret: Long = b & 0x7F
- if ((b & 0x80) != 0) {
- b = readOrThrow()
- ret |= (b & 0x7F) << 7
- if ((b & 0x80) != 0) {
- b = readOrThrow()
- ret |= (b & 0x7F) << 14
- if ((b & 0x80) != 0) {
- b = readOrThrow()
- ret |= (b & 0x7F) << 21
- if ((b & 0x80) != 0) {
- b = readOrThrow()
- ret |= (b & 0x7F).toLong << 28
- if ((b & 0x80) != 0) {
- b = readOrThrow()
- ret |= (b & 0x7F).toLong << 35
- if ((b & 0x80) != 0) {
- b = readOrThrow()
- ret |= (b & 0x7F).toLong << 42
- if ((b & 0x80) != 0) {
- b = readOrThrow()
- ret |= (b & 0x7F).toLong << 49
- if ((b & 0x80) != 0) {
- b = readOrThrow()
- ret |= b.toLong << 56
- }
- }
- }
- }
- }
- }
- }
- }
- if (!optimizePositive) (ret >>> 1) ^ -(ret & 1) else ret
- }
-
- def readLong(): Long = {
- val first = s.read()
- if (first < 0) throw new EOFException()
- (first.toLong << 56) |
- (s.read() & 0xFF).toLong << 48 |
- (s.read() & 0xFF).toLong << 40 |
- (s.read() & 0xFF).toLong << 32 |
- (s.read() & 0xFF).toLong << 24 |
- (s.read() & 0xFF) << 16 |
- (s.read() & 0xFF) << 8 |
- (s.read() & 0xFF)
- }
-
- def readDouble(): Double = java.lang.Double.longBitsToDouble(readLong())
-
- override def close(): Unit = s.close()
-}
-
-private[graphx] sealed trait ShuffleSerializerInstance extends
SerializerInstance {
-
- override def serialize[T: ClassTag](t: T): ByteBuffer = throw new
UnsupportedOperationException
-
- override def deserialize[T: ClassTag](bytes: ByteBuffer): T =
- throw new UnsupportedOperationException
-
- override def deserialize[T: ClassTag](bytes: ByteBuffer, loader:
ClassLoader): T =
- throw new UnsupportedOperationException
-
- // The implementation should override the following two.
- override def serializeStream(s: OutputStream): SerializationStream
- override def deserializeStream(s: InputStream): DeserializationStream
-}
http://git-wip-us.apache.org/repos/asf/spark/blob/300887bd/graphx/src/test/scala/org/apache/spark/graphx/SerializerSuite.scala
----------------------------------------------------------------------
diff --git
a/graphx/src/test/scala/org/apache/spark/graphx/SerializerSuite.scala
b/graphx/src/test/scala/org/apache/spark/graphx/SerializerSuite.scala
deleted file mode 100644
index 864cb1f..0000000
--- a/graphx/src/test/scala/org/apache/spark/graphx/SerializerSuite.scala
+++ /dev/null
@@ -1,122 +0,0 @@
-/*
- * 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.graphx
-
-import java.io.{EOFException, ByteArrayInputStream, ByteArrayOutputStream}
-
-import scala.util.Random
-import scala.reflect.ClassTag
-
-import org.scalatest.FunSuite
-
-import org.apache.spark._
-import org.apache.spark.graphx.impl._
-import org.apache.spark.serializer.SerializationStream
-
-
-class SerializerSuite extends FunSuite with LocalSparkContext {
-
- test("IntAggMsgSerializer") {
- val outMsg = (4: VertexId, 5)
- val bout = new ByteArrayOutputStream
- val outStrm = new IntAggMsgSerializer().newInstance().serializeStream(bout)
- outStrm.writeObject(outMsg)
- outStrm.writeObject(outMsg)
- bout.flush()
- val bin = new ByteArrayInputStream(bout.toByteArray)
- val inStrm = new IntAggMsgSerializer().newInstance().deserializeStream(bin)
- val inMsg1: (VertexId, Int) = inStrm.readObject()
- val inMsg2: (VertexId, Int) = inStrm.readObject()
- assert(outMsg === inMsg1)
- assert(outMsg === inMsg2)
-
- intercept[EOFException] {
- inStrm.readObject()
- }
- }
-
- test("LongAggMsgSerializer") {
- val outMsg = (4: VertexId, 1L << 32)
- val bout = new ByteArrayOutputStream
- val outStrm = new
LongAggMsgSerializer().newInstance().serializeStream(bout)
- outStrm.writeObject(outMsg)
- outStrm.writeObject(outMsg)
- bout.flush()
- val bin = new ByteArrayInputStream(bout.toByteArray)
- val inStrm = new
LongAggMsgSerializer().newInstance().deserializeStream(bin)
- val inMsg1: (VertexId, Long) = inStrm.readObject()
- val inMsg2: (VertexId, Long) = inStrm.readObject()
- assert(outMsg === inMsg1)
- assert(outMsg === inMsg2)
-
- intercept[EOFException] {
- inStrm.readObject()
- }
- }
-
- test("DoubleAggMsgSerializer") {
- val outMsg = (4: VertexId, 5.0)
- val bout = new ByteArrayOutputStream
- val outStrm = new
DoubleAggMsgSerializer().newInstance().serializeStream(bout)
- outStrm.writeObject(outMsg)
- outStrm.writeObject(outMsg)
- bout.flush()
- val bin = new ByteArrayInputStream(bout.toByteArray)
- val inStrm = new
DoubleAggMsgSerializer().newInstance().deserializeStream(bin)
- val inMsg1: (VertexId, Double) = inStrm.readObject()
- val inMsg2: (VertexId, Double) = inStrm.readObject()
- assert(outMsg === inMsg1)
- assert(outMsg === inMsg2)
-
- intercept[EOFException] {
- inStrm.readObject()
- }
- }
-
- test("variable long encoding") {
- def testVarLongEncoding(v: Long, optimizePositive: Boolean) {
- val bout = new ByteArrayOutputStream
- val stream = new ShuffleSerializationStream(bout) {
- def writeObject[T: ClassTag](t: T): SerializationStream = {
- writeVarLong(t.asInstanceOf[Long], optimizePositive =
optimizePositive)
- this
- }
- }
- stream.writeObject(v)
-
- val bin = new ByteArrayInputStream(bout.toByteArray)
- val dstream = new ShuffleDeserializationStream(bin) {
- def readObject[T: ClassTag](): T = {
- readVarLong(optimizePositive).asInstanceOf[T]
- }
- }
- val read = dstream.readObject[Long]()
- assert(read === v)
- }
-
- // Test all variable encoding code path (each branch uses 7 bits, i.e. 1L
<< 7 difference)
- val d = Random.nextLong() % 128
- Seq[Long](0, 1L << 0 + d, 1L << 7 + d, 1L << 14 + d, 1L << 21 + d, 1L <<
28 + d, 1L << 35 + d,
- 1L << 42 + d, 1L << 49 + d, 1L << 56 + d, 1L << 63 + d).foreach { number
=>
- testVarLongEncoding(number, optimizePositive = false)
- testVarLongEncoding(number, optimizePositive = true)
- testVarLongEncoding(-number, optimizePositive = false)
- testVarLongEncoding(-number, optimizePositive = true)
- }
- }
-}
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