chore: downgrade to spark3.3

build.sbt

@@ -7,10 +7,10 @@ import scala.xml.transform.{RewriteRule, RuleTransformer}
 import scala.xml.{Node => XmlNode, NodeSeq => XmlNodeSeq, _}
 
 val condaEnvName = "synapseml"
-val sparkVersion = "3.4.1"
+val sparkVersion = "3.3.3"
 name := "synapseml"
 ThisBuild / organization := "com.microsoft.azure"
-ThisBuild / scalaVersion := "2.12.17"
+ThisBuild / scalaVersion := "2.12.15"
 
 val scalaMajorVersion = 2.12
 
@@ -20,27 +20,22 @@ val excludes = Seq(
 )
 
 val coreDependencies = Seq(
-  // Excluding protobuf-java, as spark-core is bringing the older version transitively.
-  "org.apache.spark" %% "spark-core" % sparkVersion % "compile" exclude("com.google.protobuf", "protobuf-java"),
+  "org.apache.spark" %% "spark-core" % sparkVersion % "compile",
   "org.apache.spark" %% "spark-mllib" % sparkVersion % "compile",
-  "org.apache.spark" %% "spark-avro" % sparkVersion % "compile",
+  "org.apache.spark" %% "spark-avro" % sparkVersion % "provided",
   "org.apache.spark" %% "spark-tags" % sparkVersion % "test",
   "com.globalmentor" % "hadoop-bare-naked-local-fs" % "0.1.0" % "test",
   "org.scalatest" %% "scalatest" % "3.2.14" % "test")
 val extraDependencies = Seq(
-  "commons-lang" % "commons-lang" % "2.6",
   "org.scalactic" %% "scalactic" % "3.2.14",
   "io.spray" %% "spray-json" % "1.3.5",
   "com.jcraft" % "jsch" % "0.1.54",
   "org.apache.httpcomponents.client5" % "httpclient5" % "5.1.3",
   "org.apache.httpcomponents" % "httpmime" % "4.5.13",
-  "com.linkedin.isolation-forest" %% "isolation-forest_3.4.2" % "3.0.4"
+  "com.linkedin.isolation-forest" %% "isolation-forest_3.3.3" % "3.0.4"
     exclude("com.google.protobuf", "protobuf-java") exclude("org.apache.spark", "spark-mllib_2.12")
     exclude("org.apache.spark", "spark-core_2.12") exclude("org.apache.spark", "spark-avro_2.12")
     exclude("org.apache.spark", "spark-sql_2.12"),
-  // Although breeze 2.1.0 is already provided by Spark, this is needed for Azure Synapse Spark 3.4 pools.
-  // Otherwise a NoSuchMethodError will be thrown by interpretability code.
-  "org.scalanlp" %% "breeze" % "2.1.0"
 ).map(d => d excludeAll (excludes: _*))
 val dependencies = coreDependencies ++ extraDependencies
 

core/src/main/scala/com/microsoft/azure/synapse/ml/codegen/PyCodegen.scala

@@ -70,7 +70,7 @@ object PyCodegen {
       // There's `Already borrowed` error found in transformers 4.16.2 when using tokenizers
       s"""extras_require={"extras": [
          |    "cmake",
-         |    "horovod==0.28.1",
+         |    "horovod==0.27.0",
          |    "pytorch_lightning>=1.5.0,<1.5.10",
          |    "torch==1.13.1",
          |    "torchvision>=0.14.1",

core/src/main/scala/com/microsoft/azure/synapse/ml/core/env/PackageUtils.scala

@@ -21,7 +21,7 @@ object PackageUtils {
   // Use a fixed version for local testing
   // val PackageMavenCoordinate = s"$PackageGroup:$PackageName:1.0.5"
 
-  private val AvroCoordinate = "org.apache.spark:spark-avro_2.12:3.4.1"
+  private val AvroCoordinate = "org.apache.spark:spark-avro_2.12:3.3.3"
   val PackageRepository: String = SparkMLRepository
 
   // If testing onnx package with snapshots repo, make sure to switch to using

core/src/main/scala/com/microsoft/azure/synapse/ml/exploratory/DistributionBalanceMeasure.scala

@@ -3,7 +3,7 @@
 
 package com.microsoft.azure.synapse.ml.exploratory
 
-import breeze.stats.distributions.{ChiSquared, RandBasis}
+import breeze.stats.distributions.{ChiSquared}
 import com.microsoft.azure.synapse.ml.codegen.Wrappable
 import com.microsoft.azure.synapse.ml.core.schema.DatasetExtensions
 import com.microsoft.azure.synapse.ml.logging.{FeatureNames, SynapseMLLogging}
@@ -261,7 +261,6 @@ private[exploratory] case class DistributionMetrics(numFeatures: Int,
 
   // Calculates left-tailed p-value from degrees of freedom and chi-squared test statistic
   def chiSquaredPValue: Column = {
-    implicit val rand: RandBasis = RandBasis.mt0
     val degOfFreedom = numFeatures - 1
     val scoreCol = chiSquaredTestStatistic
     val chiSqPValueUdf = udf(

core/src/main/scala/com/microsoft/azure/synapse/ml/nn/BallTree.scala

@@ -8,6 +8,7 @@ import com.microsoft.azure.synapse.ml.core.env.StreamUtilities.using
 
 import java.io._
 import scala.collection.JavaConverters._
+import breeze.linalg.functions.euclideanDistance
 
 private case class Query(point: DenseVector[Double],
                          normOfQueryPoint: Double,
@@ -100,16 +101,16 @@ trait BallTreeBase[V] {
 }
 
 /** Performs fast lookups of nearest neighbors using the Ball Tree algorithm for space partitioning
-  *
-  * Note that this code borrows heavily from
-  * https://github.com/felixmaximilian/mips
-  *
-  * @author Felix Maximilian
-  */
+ *
+ * Note that this code borrows heavily from
+ * https://github.com/felixmaximilian/mips
+ *
+ * @author Felix Maximilian
+ */
 case class BallTree[V](override val keys: IndexedSeq[DenseVector[Double]],
                        override val values: IndexedSeq[V],
                        override val leafSize: Int = 50)  //scalastyle:ignore magic.number
-                       extends Serializable with BallTreeBase[V] {
+  extends Serializable with BallTreeBase[V] {
 
   private val root: Node = makeBallTree(pointIdx)
 

core/src/main/scala/org/apache/spark/ml/recommendation/RecommendationHelper.scala

@@ -199,20 +199,17 @@ object SparkHelpers {
 
   def flatten(ratings: Dataset[_], num: Int, dstOutputColumn: String, srcOutputColumn: String): DataFrame = {
     import ratings.sparkSession.implicits._
-    import org.apache.spark.sql.functions.{collect_top_k, struct}
+
+    val topKAggregator = new TopByKeyAggregator[Int, Int, Float](num, Ordering.by(_._2))
+    val recs = ratings.as[(Int, Int, Float)].groupByKey(_._1).agg(topKAggregator.toColumn)
+      .toDF("id", "recommendations")
 
     val arrayType = ArrayType(
       new StructType()
         .add(dstOutputColumn, IntegerType)
         .add(Constants.RatingCol, FloatType)
     )
-
-    ratings.toDF(srcOutputColumn, dstOutputColumn, Constants.RatingCol).groupBy(srcOutputColumn)
-     .agg(collect_top_k(struct(Constants.RatingCol, dstOutputColumn), num, false))
-     .as[(Int, Seq[(Float, Int)])]
-     .map(t => (t._1, t._2.map(p => (p._2, p._1))))
-     .toDF(srcOutputColumn, Constants.Recommendations)
-     .withColumn(Constants.Recommendations, col(Constants.Recommendations).cast(arrayType))
+    recs.select(col("id").as(srcOutputColumn), col("recommendations").cast(arrayType))
   }
 }
 

core/src/test/scala/com/microsoft/azure/synapse/ml/codegen/RTestGen.scala

@@ -101,7 +101,7 @@ object RTestGen {
          |  "spark.sql.shuffle.partitions=10",
          |  "spark.sql.crossJoin.enabled=true")
          |
-         |sc <- spark_connect(master = "local", version = "3.4.1", config = conf)
+         |sc <- spark_connect(master = "local", version = "3.3.3", config = conf)
          |
          |""".stripMargin, StandardOpenOption.CREATE)
 

core/src/test/scala/com/microsoft/azure/synapse/ml/nbtest/DatabricksUtilities.scala

@@ -31,11 +31,11 @@ object DatabricksUtilities {
 
   // ADB Info
   val Region = "eastus"
-  val PoolName = "synapseml-build-13.3"
-  val GpuPoolName = "synapseml-build-13.3-gpu"
-  val AdbRuntime = "13.3.x-scala2.12"
-  // https://docs.databricks.com/en/release-notes/runtime/13.3lts-ml.html
-  val AdbGpuRuntime = "13.3.x-gpu-ml-scala2.12"
+  val PoolName = "synapseml-build-12.2"
+  val GpuPoolName = "synapseml-build-12.2-gpu"
+  val AdbRuntime = "12.2.x-scala2.12"
+  // https://learn.microsoft.com/en-us/azure/databricks/release-notes/runtime/
+  val AdbGpuRuntime = "12.2.x-gpu-ml-scala2.12"
   val NumWorkers = 5
   val AutoTerminationMinutes = 15
 
@@ -84,9 +84,9 @@ object DatabricksUtilities {
     Map("maven" -> Map("coordinates" -> PackageMavenCoordinate, "repo" -> PackageRepository)),
     Map("pypi" -> Map("package" -> "pytorch-lightning==1.5.0")),
     Map("pypi" -> Map("package" -> "torchvision==0.14.1")),
-    Map("pypi" -> Map("package" -> "transformers==4.32.1")),
-    Map("pypi" -> Map("package" -> "petastorm==0.12.0")),
-    Map("pypi" -> Map("package" -> "protobuf==3.20.3"))
+    Map("pypi" -> Map("package" -> "transformers==4.25.1")),
+    Map("pypi" -> Map("package" -> "petastorm==0.12.1")),
+    Map("pypi" -> Map("package" -> "protobuf==3.19.4"))
   ).toJson.compactPrint
 
   val RapidsInitScripts: String = List(

core/src/test/scala/com/microsoft/azure/synapse/ml/nbtest/SynapseExtension/SynapseExtensionUtilities.scala

@@ -83,7 +83,7 @@ object SynapseExtensionUtilities {
          |"{
          |  'Default${store}ArtifactId': '$storeId',
          |  'ExecutableFile': '$path',
-         |  'SparkVersion':'3.4',
+         |  'SparkVersion':'3.3',
          |  'SparkSettings': {
          |    'spark.jars.packages' : '$SparkMavenPackageList',
          |    'spark.jars.repositories' : '$SparkMavenRepositoryList',

core/src/test/scala/com/microsoft/azure/synapse/ml/nbtest/SynapseUtilities.scala

@@ -255,7 +255,7 @@ object SynapseUtilities {
        |    "nodeSizeFamily": "MemoryOptimized",
        |    "provisioningState": "Succeeded",
        |    "sessionLevelPackagesEnabled": "true",
-       |    "sparkVersion": "3.4"
+       |    "sparkVersion": "3.3"
        |  }
        |}
        |""".stripMargin

deep-learning/src/main/python/horovod_installation.sh

@@ -8,9 +8,9 @@ set -eu
 # Install prerequisite libraries that horovod depends on
 pip install pytorch-lightning==1.5.0
 pip install torchvision==0.14.1
-pip install transformers==4.32.1
+pip install transformers==4.25.1
 pip install petastorm>=0.12.0
-pip install protobuf==3.20.3
+pip install protobuf==3.19.1
 
 # Remove Outdated Signing Key:
 sudo apt-key del 7fa2af80
@@ -35,13 +35,13 @@ libcusparse-dev-11-0=11.1.1.245-1
 
 git clone --recursive https://github.com/horovod/horovod.git
 cd horovod
-# git fetch origin refs/tags/v0.28.1:tags/v0.28.1
-git checkout 1d217b59949986d025f6db93c49943fb6b6cc78f
+# git fetch origin refs/tags/v0.27.0:tags/v0.27.0
+git checkout bfaca90d5cf66780a97d8799d4e1573855b64560
 git checkout -b tmp-branch
 rm -rf build/ dist/
 HOROVOD_GPU_ALLREDUCE=NCCL HOROVOD_CUDA_HOME=/usr/local/cuda-11/ HOROVOD_WITH_PYTORCH=1 HOROVOD_WITHOUT_MXNET=1 \
 /databricks/python3/bin/python setup.py bdist_wheel
 
 readlink -f dist/horovod-*.whl
 
-pip install --no-cache-dir dist/horovod-0.28.1-cp38-cp38-linux_x86_64.whl --force-reinstall --no-deps
+pip install --no-cache-dir dist/horovod-0.27.0-cp38-cp38-linux_x86_64.whl --force-reinstall --no-deps

deep-learning/src/main/python/synapse/ml/dl/DeepTextClassifier.py

@@ -11,12 +11,12 @@
 if _TRANSFORMERS_AVAILABLE:
     import transformers
 
-    _TRANSFORMERS_EQUAL_4_32_1 = transformers.__version__ == "4.32.1"
-    if _TRANSFORMERS_EQUAL_4_32_1:
+    _TRANSFORMERS_EQUAL_4_25_1 = transformers.__version__ == "4.25.1"
+    if _TRANSFORMERS_EQUAL_4_25_1:
         from transformers import AutoTokenizer
     else:
         raise RuntimeError(
-            "transformers should be == 4.32.1, found: {}".format(
+            "transformers should be == 4.25.1, found: {}".format(
                 transformers.__version__
             )
         )

deep-learning/src/main/python/synapse/ml/dl/DeepVisionClassifier.py

@@ -19,10 +19,10 @@
 if _HOROVOD_AVAILABLE:
     import horovod
 
-    _HOROVOD_EQUAL_0_28_1 = horovod.__version__ == "0.28.1"
-    if not _HOROVOD_EQUAL_0_28_1:
+    _HOROVOD_EQUAL_0_27_0 = horovod.__version__ == "0.27.0"
+    if not _HOROVOD_EQUAL_0_27_0:
         raise RuntimeError(
-            "horovod should be of version 0.28.1, found: {}".format(horovod.__version__)
+            "horovod should be of version 0.27.0, found: {}".format(horovod.__version__)
         )
 else:
     raise ModuleNotFoundError("module not found: horovod")

deep-learning/src/main/python/synapse/ml/dl/LitDeepTextModel.py

@@ -13,12 +13,12 @@
 if _TRANSFORMERS_AVAILABLE:
     import transformers
 
-    _TRANSFORMERS_EQUAL_4_32_1 = transformers.__version__ == "4.32.1"
-    if _TRANSFORMERS_EQUAL_4_32_1:
+    _TRANSFORMERS_EQUAL_4_25_1 = transformers.__version__ == "4.25.1"
+    if _TRANSFORMERS_EQUAL_4_25_1:
         from transformers import AutoModelForSequenceClassification
     else:
         raise RuntimeError(
-            "transformers should be == 4.32.1, found: {}".format(
+            "transformers should be == 4.25.1, found: {}".format(
                 transformers.__version__
             )
         )

environment.yml

@@ -3,18 +3,18 @@ channels:
   - conda-forge
   - default
 dependencies:
-  - python=3.11.8
+  - python=3.8.8
   - requests=2.26.0
   - pip=21.3
   - r-base=4.1.1
   - r-sparklyr=1.8.1
   - r-devtools=2.4.2
   - pip:
     - pyarrow>=0.15.0
-    - pyspark==3.4.1
-    - pandas==1.4.0
+    - pyspark==3.3.3
+    - pandas==1.2.5
     - wheel
-    - sphinx==5.0.2
+    - sphinx==4.2.0
     - sphinx_paramlinks==0.5.2
     - sphinx_rtd_theme
     - coverage
@@ -32,17 +32,17 @@ dependencies:
     - twine
     - mlflow
     - numpy
-    - torch==2.0.0
-    - torchvision==0.15.1
-    - horovod==0.28.1
+    - torch==1.13.1
+    - torchvision==0.14.1
+    - horovod==0.27.0
     - petastorm>=0.11.0
     - pytorch_lightning==1.5.0
     - onnxmltools==1.7.0
     - matplotlib
     - Pillow
-    - transformers==4.32.1
+    - transformers==4.25.1
     - huggingface-hub>=0.8.1
-    - langchain==0.0.152
+    - langchain==0.0.151
     - openai==0.27.5
     - black==22.3.0
     - black[jupyter]==22.3.0

pipeline.yaml

@@ -461,7 +461,7 @@ jobs:
           (timeout 5m sbt setup) || (echo "retrying" && timeout 5m sbt setup) || (echo "retrying" && timeout 5m sbt setup)
           sbt codegen
           sbt publishM2
-          SPARK_VERSION=3.4.1
+          SPARK_VERSION=3.3.3
           HADOOP_VERSION=3
           wget https://archive.apache.org/dist/spark/spark-${SPARK_VERSION}/spark-${SPARK_VERSION}-bin-hadoop${HADOOP_VERSION}.tgz
     - task: AzureCLI@2

project/plugins.sbt

@@ -4,10 +4,6 @@ addSbtPlugin("com.eed3si9n" % "sbt-buildinfo" % "0.9.0")
 addSbtPlugin("org.xerial.sbt" % "sbt-sonatype" % "3.8")
 addSbtPlugin("com.jsuereth" % "sbt-pgp" % "1.1.1")
 addSbtPlugin("com.dwijnand" % "sbt-dynver" % "4.0.0")
-addSbtPlugin("org.scoverage" % "sbt-scoverage" % "2.0.8")
+addSbtPlugin("org.scoverage" % "sbt-scoverage" % "1.9.2")
 addSbtPlugin("net.virtual-void" % "sbt-dependency-graph" % "0.10.0-RC1")
-addSbtPlugin("no.arktekk.sbt" % "aether-deploy" % "0.26.0")
-
-ThisBuild / libraryDependencySchemes ++= Seq(
-  "org.scala-lang.modules" %% "scala-xml" % VersionScheme.Always
-)
+addSbtPlugin("no.arktekk.sbt" % "aether-deploy" % "0.26.0")

start

@@ -1,8 +1,7 @@
 #!/bin/bash
 
 export OPENMPI_VERSION="3.1.2"
-
-export SPARK_VERSION="3.4.1"
+export SPARK_VERSION="3.3.3"
 export HADOOP_VERSION="3.3"
 export SYNAPSEML_VERSION="1.0.5" # Binder compatibility version
 

tools/docker/demo/Dockerfile

@@ -3,7 +3,7 @@ FROM mcr.microsoft.com/oss/mirror/docker.io/library/ubuntu:20.04
 ARG SYNAPSEML_VERSION=1.0.5
 ARG DEBIAN_FRONTEND=noninteractive
 
-ENV SPARK_VERSION=3.4.1
+ENV SPARK_VERSION=3.3.3
 ENV HADOOP_VERSION=3
 ENV SYNAPSEML_VERSION=${SYNAPSEML_VERSION}
 ENV JAVA_HOME /usr/lib/jvm/java-1.11.0-openjdk-amd64

tools/docker/minimal/Dockerfile

@@ -3,7 +3,7 @@ FROM mcr.microsoft.com/oss/mirror/docker.io/library/ubuntu:20.04
 ARG SYNAPSEML_VERSION=1.0.5
 ARG DEBIAN_FRONTEND=noninteractive
 
-ENV SPARK_VERSION=3.4.1
+ENV SPARK_VERSION=3.3.3
 ENV HADOOP_VERSION=3
 ENV SYNAPSEML_VERSION=${SYNAPSEML_VERSION}
 ENV JAVA_HOME /usr/lib/jvm/java-1.11.0-openjdk-amd64

tools/tests/run_r_tests.R

@@ -3,7 +3,7 @@ if (!require("sparklyr")) {
   library("sparklyr")
 }
 
-spark_install_tar(paste(getwd(), "/../../../../../../spark-3.4.1-bin-hadoop3.tgz", sep = ""))
+spark_install_tar(paste(getwd(), "/../../../../../../spark-3.3.3-bin-hadoop3.tgz", sep = ""))
 
 options("testthat.output_file" = "../../../../r-test-results.xml")
 devtools::test(reporter = JunitReporter$new())