[ZEPPELIN-5819] Configures ivy to download jar libraries only from re…

…mote

### What is this PR for?
Configures ivy to download jar libraries only from remote and ignore local jars

### What type of PR is it?
 * Hot Fix

### What is the Jira issue?
 * https://issues.apache.org/jira/browse/ZEPPELIN-5819

### How should this be tested?
* CI

### Questions:
* Does the licenses files need to update? No
* Is there breaking changes for older versions? No
* Does this needs documentation? No

Author: Philipp Dallig <[email protected]>

Closes #4495 from Reamer/ivy_download and squashes the following commits:

b74631a [Philipp Dallig] Configures ivy to download jar libraries only from remote

(cherry picked from commit e70b57c)
Signed-off-by: Philipp Dallig <[email protected]>

# Conflicts:
#	zeppelin-interpreter-integration/src/test/java/org/apache/zeppelin/integration/SparkIntegrationTest.java

zeppelin-interpreter-integration/src/test/java/org/apache/zeppelin/integration/SparkIntegrationTest.java

@@ -17,6 +17,7 @@
 
 package org.apache.zeppelin.integration;
 
+import org.apache.commons.io.FileUtils;
 import org.apache.commons.io.IOUtils;
 import org.apache.hadoop.yarn.api.protocolrecords.GetApplicationsRequest;
 import org.apache.hadoop.yarn.api.protocolrecords.GetApplicationsResponse;
@@ -45,6 +46,7 @@
 import java.io.File;
 import java.io.FileReader;
 import java.io.IOException;
+import java.nio.charset.StandardCharsets;
 import java.util.EnumSet;
 
 import static org.junit.Assert.assertEquals;
@@ -95,6 +97,18 @@ protected void setUpSparkInterpreterSetting(InterpreterSetting interpreterSettin
     // sub class can customize spark interpreter setting.
   }
 
+  /**
+   * Configures ivy to download jar libraries only from remote.
+   *
+   * @param interpreterSetting
+   * @throws IOException
+   */
+  private void setupIvySettings(InterpreterSetting interpreterSetting) throws IOException {
+    File ivysettings = new File(zeppelin.getZeppelinConfDir(), "ivysettings.xml");
+    FileUtils.copyToFile(SparkIntegrationTest.class.getResourceAsStream("/ivysettings.xml"), ivysettings);
+    interpreterSetting.setProperty("spark.jars.ivySettings", ivysettings.getAbsolutePath());
+  }
+
   private void testInterpreterBasics() throws IOException, InterpreterException, XmlPullParserException {
     // add jars & packages for testing
     InterpreterSetting sparkInterpreterSetting = interpreterSettingManager.getInterpreterSettingByName("spark");
@@ -170,6 +184,7 @@ public void testLocalMode() throws IOException, YarnException, InterpreterExcept
 
     try {
       setUpSparkInterpreterSetting(sparkInterpreterSetting);
+      setupIvySettings(sparkInterpreterSetting);
       testInterpreterBasics();
 
       // no yarn application launched
@@ -199,6 +214,7 @@ public void testYarnClientMode() throws IOException, YarnException, InterruptedE
 
     try {
       setUpSparkInterpreterSetting(sparkInterpreterSetting);
+      setupIvySettings(sparkInterpreterSetting);
       testInterpreterBasics();
 
       // 1 yarn application launched
@@ -251,6 +267,7 @@ public void testYarnClusterMode() throws IOException, YarnException, Interrupted
 
     try {
       setUpSparkInterpreterSetting(sparkInterpreterSetting);
+      setupIvySettings(sparkInterpreterSetting);
       testInterpreterBasics();
 
       // 1 yarn application launched
@@ -333,6 +350,6 @@ private String getPythonExec() throws IOException, InterruptedException {
     if (process.waitFor() != 0) {
       throw new RuntimeException("Fail to run command: which python.");
     }
-    return IOUtils.toString(process.getInputStream()).trim();
+    return IOUtils.toString(process.getInputStream(), StandardCharsets.UTF_8).trim();
   }
 }

zeppelin-interpreter-integration/src/test/resources/ivysettings.xml

@@ -0,0 +1,6 @@
+<ivysettings>
+    <settings defaultResolver="central"/>
+    <resolvers>
+        <ibiblio name="central" m2compatible="true" root="https://repo1.maven.org/maven2/"/>
+    </resolvers>
+</ivysettings>