diff --git a/.github/workflows/core.yml b/.github/workflows/core.yml
index 6757179..21a355d 100644
--- a/.github/workflows/core.yml
+++ b/.github/workflows/core.yml
@@ -58,15 +58,14 @@
           activate-environment: python_3_with_R
           environment-file: testing/env_python_${{ matrix.python }}_with_R.yml
           python-version: ${{ matrix.python }}
+          mamba-version: "*"
+          channels: conda-forge,defaults
+          channel-priority: true
           auto-activate-base: false
-          channel-priority: strict
+          use-mamba: true
       - name: Make IRkernel available to Jupyter
         run: |
-          R -e "install.packages('devtools', repos = 'http://cran.us.r-project.org')"
-          R -e "devtools::install_github('IRkernel/IRkernel')"
           R -e "IRkernel::installspec()"
-          conda list
-          conda info
       - name: install application with some interpreter
         run: mvn install -Pbuild-distr -DskipRat -DskipTests -pl zeppelin-server,zeppelin-web,spark-submit,spark/spark-dependencies,markdown,angular,shell -am -Phelium-dev -Pexamples -P${{ matrix.hadoop }} -B
       - name: install and test plugins
@@ -102,11 +101,13 @@
           activate-environment: python_3_with_R_and_tensorflow
           environment-file: testing/env_python_3_with_R_and_tensorflow.yml
           python-version: 3.7
+          mamba-version: "*"
+          channels: conda-forge,defaults
+          channel-priority: true
           auto-activate-base: false
+          use-mamba: true
       - name: Make IRkernel available to Jupyter
         run: |
-          R -e "install.packages('devtools', repos = 'http://cran.us.r-project.org')"
-          R -e "devtools::install_github('IRkernel/IRkernel')"
           R -e "IRkernel::installspec()"
       - name: verify interpreter
         run: mvn verify -DskipRat -am -pl .,zeppelin-interpreter,zeppelin-interpreter-shaded,${INTERPRETERS} -Pscala-2.10 -B
@@ -137,11 +138,13 @@
           activate-environment: python_3_with_R
           environment-file: testing/env_python_3_with_R.yml
           python-version: 3.7
+          mamba-version: "*"
+          channels: conda-forge,defaults
+          channel-priority: true
           auto-activate-base: false
+          use-mamba: true
       - name: Make IRkernel available to Jupyter
         run: |
-          R -e "install.packages('devtools', repos = 'http://cran.us.r-project.org')"
-          R -e "devtools::install_github('IRkernel/IRkernel')"
           R -e "IRkernel::installspec()"
       - name: install environment
         run: |
@@ -180,7 +183,11 @@
           activate-environment: python_3_with_flink
           environment-file: testing/env_python_3_with_flink_${{ matrix.flink }}.yml
           python-version: 3.7
+          mamba-version: "*"
+          channels: conda-forge,defaults
+          channel-priority: true
           auto-activate-base: false
+          use-mamba: true
       - name: install environment
         run: |
           mvn install -DskipTests -DskipRat -am -pl flink/flink-scala-2.11,flink/flink-scala-2.12,flink-cmd,zeppelin-interpreter-integration -Pflink-${{ matrix.flink }} -Pintegration -B
@@ -214,11 +221,13 @@
           activate-environment: python_3_with_R
           environment-file: testing/env_python_3_with_R.yml
           python-version: 3.7
+          mamba-version: "*"
+          channels: conda-forge,defaults
+          channel-priority: true
           auto-activate-base: false
+          use-mamba: true
       - name: Make IRkernel available to Jupyter
         run: |
-          R -e "install.packages('devtools', repos = 'http://cran.us.r-project.org')"
-          R -e "devtools::install_github('IRkernel/IRkernel')"
           R -e "IRkernel::installspec()"
       - name: install environment
         run: |
@@ -257,11 +266,13 @@
           activate-environment: python_3_with_R
           environment-file: testing/env_python_3_with_R.yml
           python-version: 3.7
+          mamba-version: "*"
+          channels: conda-forge,defaults
+          channel-priority: true
           auto-activate-base: false
+          use-mamba: true
       - name: Make IRkernel available to Jupyter
         run: |
-          R -e "install.packages('devtools', repos = 'http://cran.us.r-project.org')"
-          R -e "devtools::install_github('IRkernel/IRkernel')"
           R -e "IRkernel::installspec()"
       - name: install environment
         run: |
@@ -297,11 +308,13 @@
           activate-environment: python_3_with_R
           environment-file: testing/env_python_3_with_R.yml
           python-version: 3.7
+          mamba-version: "*"
+          channels: conda-forge,defaults
+          channel-priority: true
           auto-activate-base: false
+          use-mamba: true
       - name: Make IRkernel available to Jupyter
         run: |
-          R -e "install.packages('devtools', repos = 'http://cran.us.r-project.org')"
-          R -e "devtools::install_github('IRkernel/IRkernel')"
           R -e "IRkernel::installspec()"
       - name: install environment
         run: |
@@ -340,11 +353,13 @@
           activate-environment: python_3_with_R
           environment-file: testing/env_python_${{ matrix.python }}_with_R.yml
           python-version: ${{ matrix.python }}
+          mamba-version: "*"
+          channels: conda-forge,defaults
+          channel-priority: true
           auto-activate-base: false
+          use-mamba: true
       - name: Make IRkernel available to Jupyter
         run: |
-          R -e "install.packages('devtools', repos = 'http://cran.us.r-project.org')"
-          R -e "devtools::install_github('IRkernel/IRkernel')"
           R -e "IRkernel::installspec()"
       - name: install environment
         run: |
@@ -383,11 +398,13 @@
           activate-environment: python_3_with_R
           environment-file: testing/env_python_${{ matrix.python }}_with_R.yml
           python-version: ${{ matrix.python }}
+          mamba-version: "*"
+          channels: conda-forge,defaults
+          channel-priority: true
           auto-activate-base: false
+          use-mamba: true
       - name: Make IRkernel available to Jupyter
         run: |
-          R -e "install.packages('devtools', repos = 'http://cran.us.r-project.org')"
-          R -e "devtools::install_github('IRkernel/IRkernel')"
           R -e "IRkernel::installspec()"
       - name: install environment
         run: mvn install -DskipTests -DskipRat -pl spark-submit,spark/spark-dependencies -am -Pspark-3.1 -Pspark-scala-2.12 -Phadoop2 -B
@@ -425,11 +442,13 @@
           activate-environment: python_3_with_R
           environment-file: testing/env_python_${{ matrix.python }}_with_R.yml
           python-version: ${{ matrix.python }}
+          mamba-version: "*"
+          channels: conda-forge,defaults
+          channel-priority: true
           auto-activate-base: false
+          use-mamba: true
       - name: Make IRkernel available to Jupyter
         run: |
-          R -e "install.packages('devtools', repos = 'http://cran.us.r-project.org')"
-          R -e "devtools::install_github('IRkernel/IRkernel')"
           R -e "IRkernel::installspec()"
       - name: install environment
         run: mvn install -DskipTests -DskipRat -pl spark-submit,spark/spark-dependencies -am -Pspark-3.2 -Pspark-scala-2.12 -Phadoop2 -B
@@ -463,7 +482,11 @@
           activate-environment: python_3_with_R
           environment-file: testing/env_python_3_with_R.yml
           python-version: 3.7
+          mamba-version: "*"
+          channels: conda-forge,defaults
+          channel-priority: true
           auto-activate-base: false
+          use-mamba: true
       - name: install environment
         run: |
           mvn install -DskipTests -DskipRat -pl livy -am  -B
diff --git a/spark/interpreter/src/main/java/org/apache/zeppelin/spark/SparkInterpreter.java b/spark/interpreter/src/main/java/org/apache/zeppelin/spark/SparkInterpreter.java
index a4c9b76..500fd28 100644
--- a/spark/interpreter/src/main/java/org/apache/zeppelin/spark/SparkInterpreter.java
+++ b/spark/interpreter/src/main/java/org/apache/zeppelin/spark/SparkInterpreter.java
@@ -264,17 +264,17 @@
     if (conf.contains("zeppelin.spark.scala.version")) {
       scalaVersionString = conf.get("zeppelin.spark.scala.version");
     } else {
-      scalaVersionString = scala.util.Properties.versionString();
+      scalaVersionString = scala.util.Properties.versionNumberString();
     }
     LOGGER.info("Using Scala: " + scalaVersionString);
 
     if (StringUtils.isEmpty(scalaVersionString)) {
       throw new InterpreterException("Scala Version is empty");
-    } else if (scalaVersionString.contains("2.10")) {
+    } else if (scalaVersionString.startsWith("2.10")) {
       return "2.10";
-    } else if (scalaVersionString.contains("2.11")) {
+    } else if (scalaVersionString.startsWith("2.11")) {
       return "2.11";
-    } else if (scalaVersionString.contains("2.12")) {
+    } else if (scalaVersionString.startsWith("2.12")) {
       return "2.12";
     } else {
       throw new InterpreterException("Unsupported scala version: " + scalaVersionString);
@@ -286,7 +286,7 @@
   }
 
   public boolean isScala210() throws InterpreterException {
-    return extractScalaVersion().equals("2.10");
+    return scalaVersion.equals("2.10");
   }
 
   private List<String> getDependencyFiles() throws InterpreterException {
diff --git a/zeppelin-zengine/src/main/java/org/apache/zeppelin/interpreter/launcher/SparkInterpreterLauncher.java b/zeppelin-zengine/src/main/java/org/apache/zeppelin/interpreter/launcher/SparkInterpreterLauncher.java
index 2aa7ccb..4277cee 100644
--- a/zeppelin-zengine/src/main/java/org/apache/zeppelin/interpreter/launcher/SparkInterpreterLauncher.java
+++ b/zeppelin-zengine/src/main/java/org/apache/zeppelin/interpreter/launcher/SparkInterpreterLauncher.java
@@ -121,6 +121,7 @@
     String scalaVersion = null;
     try {
       scalaVersion = detectSparkScalaVersion(getEnv("SPARK_HOME"), env);
+      LOGGER.info("Scala version: {}", scalaVersion);
       context.getProperties().put("zeppelin.spark.scala.version", scalaVersion);
     } catch (Exception e) {
       throw new IOException("Fail to detect scala version, the reason is:"+ e.getMessage());