diff --git a/eng/versioning/external_dependencies.txt b/eng/versioning/external_dependencies.txt
index cae552431453..7b79bcdb9532 100644
--- a/eng/versioning/external_dependencies.txt
+++ b/eng/versioning/external_dependencies.txt
@@ -380,7 +380,7 @@ cosmos-spark_3-2_org.apache.spark:spark-hive_2.12;3.2.0
 cosmos-spark_3-3_org.apache.spark:spark-hive_2.12;3.3.0
 cosmos-spark_3-4_org.apache.spark:spark-hive_2.12;3.4.0
 cosmos-spark_3-5_org.apache.spark:spark-hive_2.12;3.5.0
-cosmos_org.scala-lang:scala-library;2.12.10
+cosmos_org.scala-lang:scala-library;2.12.19
 cosmos_org.scala-lang.modules:scala-java8-compat_2.12;0.8.0
 cosmos_io.projectreactor:reactor-scala-extensions_2.12;0.8.0
 cosmos_commons-io:commons-io;2.4
diff --git a/sdk/cosmos/azure-cosmos-spark-account-data-resolver-sample/pom.xml b/sdk/cosmos/azure-cosmos-spark-account-data-resolver-sample/pom.xml
index 46d7e2be6d51..ededed015151 100644
--- a/sdk/cosmos/azure-cosmos-spark-account-data-resolver-sample/pom.xml
+++ b/sdk/cosmos/azure-cosmos-spark-account-data-resolver-sample/pom.xml
@@ -20,8 +20,8 @@
     <maven.build.timestamp.format>MM-dd-HH-mm-ss</maven.build.timestamp.format>
     <jacoco.min.branchcoverage>0.17</jacoco.min.branchcoverage>
     <jacoco.min.linecoverage>0.18</jacoco.min.linecoverage>
-    <maven.compiler.source>11</maven.compiler.source>
-    <maven.compiler.target>11</maven.compiler.target>
+    <maven.compiler.source>8</maven.compiler.source>
+    <maven.compiler.target>8</maven.compiler.target>
     <jacoco.skip>true</jacoco.skip>
     <shadingPrefix>azure_cosmos_spark_sample</shadingPrefix>
     <legal>
@@ -84,7 +84,7 @@
     <dependency>
       <groupId>org.scala-lang</groupId>
       <artifactId>scala-library</artifactId>
-      <version>2.12.10</version> <!-- {x-version-update;cosmos_org.scala-lang:scala-library;external_dependency} -->
+      <version>2.12.19</version> <!-- {x-version-update;cosmos_org.scala-lang:scala-library;external_dependency} -->
       <scope>provided</scope>
     </dependency>
     <dependency>
@@ -143,6 +143,55 @@
       </exclusions>
     </dependency>
 
+    <dependency>
+      <groupId>com.globalmentor</groupId>
+      <artifactId>hadoop-bare-naked-local-fs</artifactId>
+      <version>0.1.0</version> <!-- {x-version-update;cosmos_com.globalmentor:hadoop-bare-naked-local-fs;external_dependency} -->
+      <scope>test</scope>
+    </dependency>
+    <dependency>
+      <groupId>org.mockito</groupId>
+      <artifactId>mockito-core</artifactId>
+      <version>4.8.1</version> <!-- {x-version-update;cosmos_org.mockito:mockito-core;external_dependency} -->
+      <scope>test</scope>
+    </dependency>
+    <dependency>
+      <groupId>io.projectreactor</groupId>
+      <artifactId>reactor-test</artifactId>
+      <version>3.4.36</version> <!-- {x-version-update;io.projectreactor:reactor-test;external_dependency} -->
+      <scope>test</scope>
+    </dependency>
+    <dependency>
+      <groupId>org.assertj</groupId>
+      <artifactId>assertj-core</artifactId>
+      <version>3.22.0</version> <!-- {x-version-update;org.assertj:assertj-core;external_dependency} -->
+      <scope>test</scope>
+    </dependency>
+    <dependency>
+      <groupId>org.scalatest</groupId>
+      <artifactId>scalatest_2.12</artifactId>
+      <version>3.2.2</version> <!-- {x-version-update;cosmos_org.scalatest:scalatest_2.12;external_dependency} -->
+      <scope>test</scope>
+    </dependency>
+    <dependency>
+      <groupId>org.scalatest</groupId>
+      <artifactId>scalatest-flatspec_2.12</artifactId>
+      <version>3.2.3</version> <!-- {x-version-update;cosmos_org.scalatest:scalatest-flatspec_2.12;external_dependency} -->
+      <scope>test</scope>
+    </dependency>
+    <dependency>
+      <groupId>org.scalactic</groupId>
+      <artifactId>scalactic_2.12</artifactId>
+      <version>3.2.3</version> <!-- {x-version-update;cosmos_org.scalactic:scalactic_2.12;external_dependency} -->
+      <scope>test</scope>
+    </dependency>
+    <dependency>
+      <groupId>org.scalamock</groupId>
+      <artifactId>scalamock_2.12</artifactId>
+      <version>5.0.0</version> <!-- {x-version-update;cosmos_org.scalamock:scalamock_2.12;external_dependency} -->
+      <scope>test</scope>
+    </dependency>
+
     <!-- Added this provided dependency to include necessary annotations used by "reactor-core".
          Without this dependency, javadoc throws a warning as it cannot find enum When.MAYBE
          which is used in @Nullable annotation in reactor core classes.
@@ -230,7 +279,7 @@
                 <include>org.slf4j:slf4j-api:[1.7.36]</include> <!-- {x-include-update;org.slf4j:slf4j-api;external_dependency} -->
                 <include>org.apache.spark:spark-sql_2.12:[3.5.0]</include> <!-- {x-include-update;cosmos-spark_3-5_org.apache.spark:spark-sql_2.12;external_dependency} -->
                 <include>commons-io:commons-io:[2.4]</include> <!-- {x-include-update;cosmos_commons-io:commons-io;external_dependency} -->
-                <include>org.scala-lang:scala-library:[2.12.10]</include> <!-- {x-include-update;cosmos_org.scala-lang:scala-library;external_dependency} -->
+                <include>org.scala-lang:scala-library:[2.12.19]</include> <!-- {x-include-update;cosmos_org.scala-lang:scala-library;external_dependency} -->
                 <include>org.scala-lang.modules:scala-java8-compat_2.12:[0.8.0]</include> <!-- {x-include-update;cosmos_org.scala-lang.modules:scala-java8-compat_2.12;external_dependency} -->
                 <include>io.projectreactor:reactor-scala-extensions_2.12:[0.8.0]</include> <!-- {x-include-update;cosmos_io.projectreactor:reactor-scala-extensions_2.12;external_dependency} -->
                 <include>org.scalatest:scalatest_2.12:[3.2.2]</include> <!-- {x-include-update;cosmos_org.scalatest:scalatest_2.12;external_dependency} -->
@@ -325,9 +374,9 @@
             <artifactId>scala-maven-plugin</artifactId>
             <version>4.8.1</version> <!-- {x-version-update;cosmos_net.alchim31.maven:scala-maven-plugin;external_dependency} -->
             <configuration>
-              <source>11</source>
-              <target>11</target>
-              <scalaVersion>2.12.10</scalaVersion>
+              <source>1.8</source>
+              <target>1.8</target>
+              <scalaVersion>2.12.19</scalaVersion>
             </configuration>
             <executions>
               <execution>
@@ -738,13 +787,13 @@
               <execution>
                 <id>default-compile</id>
                 <configuration>
-                  <release>11</release>
+                  <release>8</release>
                 </configuration>
               </execution>
               <!-- Here the 'base-compile' execution section of java-lts profile defined in parent pom.client.xml is
               overridden. In parent pom, this execution entry enforces java8 release compatibility. The Spark
-              connectors for Spark 3.0 and above not available in Java8, hence here in this pom we override that
-              release compact to 11.
+              connectors for Spark 3.0 and above are available in Java8, hence here in this pom we override that
+              release compact to 1.8.
               -->
               <execution>
                 <id>base-compile</id>
@@ -752,7 +801,7 @@
                   <goal>compile</goal>
                 </goals>
                 <configuration combine.self="override">
-                  <release>11</release>
+                  <release>8</release>
                 </configuration>
               </execution>
               <execution>
@@ -761,8 +810,8 @@
                   <goal>testCompile</goal>
                 </goals>
                 <configuration>
-                  <release>11</release>
-                  <testRelease>11</testRelease>
+                  <release>8</release>
+                  <testRelease>8</testRelease>
                 </configuration>
               </execution>
               <execution>
@@ -771,7 +820,7 @@
                   <goal>testCompile</goal>
                 </goals>
                 <configuration combine.self="override">
-                  <testRelease>11</testRelease>
+                  <testRelease>8</testRelease>
                 </configuration>
               </execution>
             </executions>
diff --git a/sdk/cosmos/azure-cosmos-spark_3_2-12/pom.xml b/sdk/cosmos/azure-cosmos-spark_3_2-12/pom.xml
index eb3f0fa62bd2..9d3388c67b9b 100644
--- a/sdk/cosmos/azure-cosmos-spark_3_2-12/pom.xml
+++ b/sdk/cosmos/azure-cosmos-spark_3_2-12/pom.xml
@@ -20,8 +20,8 @@
     <maven.build.timestamp.format>MM-dd-HH-mm-ss</maven.build.timestamp.format>
     <jacoco.min.branchcoverage>0.17</jacoco.min.branchcoverage>
     <jacoco.min.linecoverage>0.18</jacoco.min.linecoverage>
-    <maven.compiler.source>11</maven.compiler.source>
-    <maven.compiler.target>11</maven.compiler.target>
+    <maven.compiler.source>8</maven.compiler.source>
+    <maven.compiler.target>8</maven.compiler.target>
     <jacoco.skip>true</jacoco.skip>
     <shadingPrefix>azure_cosmos_spark</shadingPrefix>
     <shadingPrefixNetty>azurecosmosspark</shadingPrefixNetty>
@@ -47,12 +47,11 @@
     </developer>
   </developers>
 
-
   <dependencies>
     <dependency>
       <groupId>org.scala-lang</groupId>
       <artifactId>scala-library</artifactId>
-      <version>2.12.10</version> <!-- {x-version-update;cosmos_org.scala-lang:scala-library;external_dependency} -->
+      <version>2.12.19</version> <!-- {x-version-update;cosmos_org.scala-lang:scala-library;external_dependency} -->
       <scope>provided</scope>
     </dependency>
     <dependency>
@@ -228,7 +227,7 @@
                 <include>org.apache.spark:spark-sql_2.12:[3.4.0]</include> <!-- {x-include-update;cosmos-spark_3-4_org.apache.spark:spark-sql_2.12;external_dependency} -->
                 <include>org.apache.spark:spark-sql_2.12:[3.5.0]</include> <!-- {x-include-update;cosmos-spark_3-5_org.apache.spark:spark-sql_2.12;external_dependency} -->
                 <include>commons-io:commons-io:[2.4]</include> <!-- {x-include-update;cosmos_commons-io:commons-io;external_dependency} -->
-                <include>org.scala-lang:scala-library:[2.12.10]</include> <!-- {x-include-update;cosmos_org.scala-lang:scala-library;external_dependency} -->
+                <include>org.scala-lang:scala-library:[2.12.19]</include> <!-- {x-include-update;cosmos_org.scala-lang:scala-library;external_dependency} -->
                 <include>org.scala-lang.modules:scala-java8-compat_2.12:[0.8.0]</include> <!-- {x-include-update;cosmos_org.scala-lang.modules:scala-java8-compat_2.12;external_dependency} -->
                 <include>io.projectreactor:reactor-scala-extensions_2.12:[0.8.0]</include> <!-- {x-include-update;cosmos_io.projectreactor:reactor-scala-extensions_2.12;external_dependency} -->
                 <include>org.scalatest:scalatest_2.12:[3.2.2]</include> <!-- {x-include-update;cosmos_org.scalatest:scalatest_2.12;external_dependency} -->
@@ -326,9 +325,9 @@
             <artifactId>scala-maven-plugin</artifactId>
             <version>4.8.1</version> <!-- {x-version-update;cosmos_net.alchim31.maven:scala-maven-plugin;external_dependency} -->
             <configuration>
-              <source>11</source>
-              <target>11</target>
-              <scalaVersion>2.12.10</scalaVersion>
+              <source>1.8</source>
+              <target>1.8</target>
+              <scalaVersion>2.12.19</scalaVersion>
             </configuration>
             <executions>
               <execution>
@@ -768,13 +767,13 @@
               <execution>
                 <id>default-compile</id>
                 <configuration>
-                  <release>11</release>
+                  <release>8</release>
                 </configuration>
               </execution>
               <!-- Here the 'base-compile' execution section of java-lts profile defined in parent pom.client.xml is
               overridden. In parent pom, this execution entry enforces java8 release compatibility. The Spark
-              connectors for Spark 3.0 and above not available in Java8, hence here in this pom we override that
-              release compact to 11.
+              connectors for Spark 3.0 and above are available in Java8, hence here in this pom we override that
+              release compact to 1.8.
               -->
               <execution>
                 <id>base-compile</id>
@@ -782,7 +781,7 @@
                   <goal>compile</goal>
                 </goals>
                 <configuration combine.self="override">
-                  <release>11</release>
+                  <release>8</release>
                 </configuration>
               </execution>
               <execution>
@@ -791,8 +790,8 @@
                   <goal>testCompile</goal>
                 </goals>
                 <configuration>
-                  <release>11</release>
-                  <testRelease>11</testRelease>
+                  <release>8</release>
+                  <testRelease>8</testRelease>
                 </configuration>
               </execution>
               <execution>
@@ -801,7 +800,7 @@
                   <goal>testCompile</goal>
                 </goals>
                 <configuration combine.self="override">
-                  <testRelease>11</testRelease>
+                  <testRelease>8</testRelease>
                 </configuration>
               </execution>
             </executions>
diff --git a/sdk/cosmos/azure-cosmos-spark_3_2-12/src/main/scala/com/azure/cosmos/spark/CosmosClientCache.scala b/sdk/cosmos/azure-cosmos-spark_3_2-12/src/main/scala/com/azure/cosmos/spark/CosmosClientCache.scala
index 1ba20f0e96df..b4ad5cc0caa0 100644
--- a/sdk/cosmos/azure-cosmos-spark_3_2-12/src/main/scala/com/azure/cosmos/spark/CosmosClientCache.scala
+++ b/sdk/cosmos/azure-cosmos-spark_3_2-12/src/main/scala/com/azure/cosmos/spark/CosmosClientCache.scala
@@ -17,6 +17,7 @@ import org.apache.spark.scheduler.{SparkListener, SparkListenerApplicationEnd}
 import org.apache.spark.sql.SparkSession
 import org.apache.spark.{SparkContext, TaskContext}
 import reactor.core.publisher.Mono
+import reactor.core.scheduler.{Scheduler, Schedulers}
 
 import java.time.{Duration, Instant}
 import java.util.ConcurrentModificationException
@@ -52,6 +53,15 @@ private[spark] object CosmosClientCache extends BasicLoggingTrait {
     this.cleanupIntervalInSeconds,
     TimeUnit.SECONDS)
 
+  private val AAD_AUTH_BOUNDED_ELASTIC_THREAD_NAME = "cosmos-client-cache-auth-bounded-elastic"
+  private val TTL_FOR_SCHEDULER_WORKER_IN_SECONDS = 60 // same as BoundedElasticScheduler.DEFAULT_TTL_SECONDS
+
+  private val aadAuthBoundedElastic: Scheduler = Schedulers.newBoundedElastic(
+    Schedulers.DEFAULT_BOUNDED_ELASTIC_SIZE,
+    Schedulers.DEFAULT_BOUNDED_ELASTIC_QUEUESIZE,
+    AAD_AUTH_BOUNDED_ELASTIC_THREAD_NAME,
+    TTL_FOR_SCHEDULER_WORKER_IN_SECONDS, true)
+
   def apply(cosmosClientConfiguration: CosmosClientConfiguration,
             cosmosClientStateHandle: Option[CosmosClientMetadataCachesSnapshot],
             calledFrom: String): CosmosClientCacheItem = {
@@ -615,10 +625,14 @@ private[spark] object CosmosClientCache extends BasicLoggingTrait {
 
   private[this] class CosmosAccessTokenCredential(val tokenProvider: (List[String]) =>CosmosAccessToken) extends TokenCredential {
     override def getToken(tokenRequestContext: TokenRequestContext): Mono[AccessToken] = {
-      val token = tokenProvider
-        .apply(tokenRequestContext.getScopes.asScala.toList)
+      val returnValue: Mono[AccessToken] = Mono.fromCallable(() => {
+        val token = tokenProvider
+          .apply(tokenRequestContext.getScopes.asScala.toList)
+
+        new AccessToken(token.token, token.Offset)
+      })
 
-      Mono.just(new AccessToken(token.token, token.Offset))
+      returnValue.publishOn(aadAuthBoundedElastic)
     }
   }
 }