[SPARKNLP-940] Adding changes to correctly copy cluster index storage…

build.sbt

@@ -144,13 +144,17 @@ lazy val utilDependencies = Seq(
     exclude ("com.fasterxml.jackson.core", "jackson-annotations")
     exclude ("com.fasterxml.jackson.core", "jackson-databind")
     exclude ("com.fasterxml.jackson.core", "jackson-core")
+    exclude ("com.fasterxml.jackson.dataformat", "jackson-dataformat-cbor")
     exclude ("commons-configuration", "commons-configuration"),
   liblevenshtein
     exclude ("com.google.guava", "guava")
     exclude ("org.apache.commons", "commons-lang3")
     exclude ("com.google.code.findbugs", "annotations")
     exclude ("org.slf4j", "slf4j-api"),
-  gcpStorage,
+  gcpStorage
+    exclude ("com.fasterxml.jackson.core", "jackson-core")
+    exclude ("com.fasterxml.jackson.dataformat", "jackson-dataformat-cbor")
+  ,
   greex,
   azureIdentity,
   azureStorage)

examples/util/Load_Model_from_GCP_Storage.ipynb

@@ -80,7 +80,8 @@
     "1. GCP connector: You need to identify your hadoop version and set the required dependency in `spark.jars.packages`\n",
     "2. ADC credentials: After following the instructions to setup ADC, you will have a JSON file that holds your authenticiation information. This file is setup in `spark.hadoop.google.cloud.auth.service.account.json.keyfile`\n",
     "3. Hadoop File System: You also need to setup the Hadoop implementation to work with GCP Storage as file system. This is define in `spark.hadoop.fs.gs.impl`\n",
-    "3. Finally, to mitigate conflicts between Spark's dependencies and user dependencies. You must define `spark.driver.userClassPathFirst` as true. You may also need to define `spark.executor.userClassPathFirst` as true.\n",
+    "4. To mitigate conflicts between Spark's dependencies and user dependencies. You must define `spark.driver.userClassPathFirst` as true. You may also need to define `spark.executor.userClassPathFirst` as true.\n",
+    "5. Additonaly, to avoid conflict errors whe need to exclude the following dependency: `com.fasterxml.jackson.core:jackson-core`\n",
     "\n"
    ]
   },
@@ -128,6 +129,7 @@
     "    \"spark.jars.packages\": \"com.google.cloud.bigdataoss:gcs-connector:hadoop3-2.2.8\",\n",
     "    \"spark.hadoop.fs.gs.impl\": \"com.google.cloud.hadoop.fs.gcs.GoogleHadoopFileSystem\",\n",
     "    \"spark.driver.userClassPathFirst\": \"true\",\n",
+    "    \"spark.jars.excludes\": \"com.fasterxml.jackson.core:jackson-core\",\n",
     "    \"spark.hadoop.google.cloud.auth.service.account.json.keyfile\": json_keyfile,\n",
     "    \"spark.jsl.settings.gcp.project_id\": PROJECT_ID,\n",
     "    \"spark.jsl.settings.pretrained.cache_folder\": CACHE_FOLDER\n",

src/main/scala/com/johnsnowlabs/storage/RocksDBConnection.scala

@@ -42,9 +42,9 @@ final class RocksDBConnection private (path: String) extends AutoCloseable {
   }
 
   def findLocalIndex: String = {
-    val localPath = RocksDBConnection.getLocalPath(path)
-    if (new File(localPath).exists()) {
-      localPath
+    val tmpIndexStorageLocalPath = RocksDBConnection.getTmpIndexStorageLocalPath(path)
+    if (new File(tmpIndexStorageLocalPath).exists()) {
+      tmpIndexStorageLocalPath
     } else if (new File(path).exists()) {
       path
     } else {
@@ -135,7 +135,7 @@ object RocksDBConnection {
   def getOrCreate(database: Database.Name, refName: String): RocksDBConnection =
     getOrCreate(database.toString, refName)
 
-  def getLocalPath(fileName: String): String = {
+  def getTmpIndexStorageLocalPath(fileName: String): String = {
     Path
       .mergePaths(new Path(SparkFiles.getRootDirectory()), new Path("/storage/" + fileName))
       .toString

src/main/scala/com/johnsnowlabs/storage/StorageHelper.scala

@@ -84,13 +84,38 @@ object StorageHelper {
       sparkContext: SparkContext): Unit = {
     destinationScheme match {
       case "file" => {
-        val destination = new Path(RocksDBConnection.getLocalPath(clusterFileName))
-        copyIndexToLocal(source, destination, sparkContext)
+        val sourceFileSystemScheme = source.getFileSystem(sparkContext.hadoopConfiguration)
+        val tmpIndexStorageLocalPath =
+          RocksDBConnection.getTmpIndexStorageLocalPath(clusterFileName)
+        sourceFileSystemScheme.getScheme match {
+          case "file" => {
+            if (!doesDirectoryExistJava(tmpIndexStorageLocalPath) ||
+              !doesDirectoryExistHadoop(tmpIndexStorageLocalPath, sparkContext)) {
+              copyIndexToLocal(source, new Path(tmpIndexStorageLocalPath), sparkContext)
+            }
+          }
+          case "s3a" =>
+            copyIndexToLocal(source, new Path(tmpIndexStorageLocalPath), sparkContext)
+          case _ => copyIndexToCluster(source, clusterFilePath, sparkContext)
+        }
+      }
+      case _ => {
+        copyIndexToCluster(source, clusterFilePath, sparkContext)
       }
-      case _ => copyIndexToCluster(source, clusterFilePath, sparkContext)
     }
   }
 
+  private def doesDirectoryExistJava(path: String): Boolean = {
+    val directory = new File(path)
+    directory.exists && directory.isDirectory
+  }
+
+  private def doesDirectoryExistHadoop(path: String, sparkContext: SparkContext): Boolean = {
+    val localPath = new Path(path)
+    val fileSystem = localPath.getFileSystem(sparkContext.hadoopConfiguration)
+    fileSystem.exists(localPath)
+  }
+
   private def copyIndexToCluster(
       sourcePath: Path,
       dst: Path,
@@ -129,21 +154,17 @@ object StorageHelper {
     val fileSystemDestination = destination.getFileSystem(sparkContext.hadoopConfiguration)
     val fileSystemSource = source.getFileSystem(sparkContext.hadoopConfiguration)
 
-    if (fileSystemDestination.exists(destination)) {
-      return
-    }
-
-    if (fileSystemSource.getScheme == "s3a" && fileSystemDestination.getScheme == "file") {
+    if (fileSystemSource.getScheme == "file") {
+      fileSystemDestination.copyFromLocalFile(false, true, source, destination)
+    } else {
       CloudResources.downloadBucketToLocalTmp(
         source.toString,
         destination.toString,
         isIndex = true)
-      sparkContext.addFile(destination.toString, recursive = true)
-      return
-    }
-
-    if (fileSystemDestination.getScheme != "s3a") {
-      fileSystemDestination.copyFromLocalFile(false, true, source, destination)
+      val isLocalMode = sparkContext.master.startsWith("local")
+      if (isLocalMode) {
+        sparkContext.addFile(destination.toString, recursive = true)
+      }
     }
   }