SONAR-17678 remove usage of pack200

17 files changed, 61 insertions, 564 deletions

diff --git a/server/sonar-webserver-api/src/main/java/org/sonar/server/plugins/PluginCompressor.java b/server/sonar-webserver-api/src/main/java/org/sonar/server/plugins/PluginCompressor.java
deleted file mode 100644
index 7cfc7321422..00000000000
--- a/server/sonar-webserver-api/src/main/java/org/sonar/server/plugins/PluginCompressor.java
+++ /dev/null
@@ -1,105 +0,0 @@
-/*
- * SonarQube
- * Copyright (C) 2009-2022 SonarSource SA
- * mailto:info AT sonarsource DOT com
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 3 of the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public License
- * along with this program; if not, write to the Free Software Foundation,
- * Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
- */
-package org.sonar.server.plugins;
-
-import java.io.BufferedInputStream;
-import java.io.BufferedOutputStream;
-import java.io.File;
-import java.io.IOException;
-import java.io.OutputStream;
-import java.nio.file.Files;
-import java.nio.file.Path;
-import java.util.Optional;
-import java.util.jar.JarInputStream;
-import java.util.jar.Pack200;
-import java.util.zip.GZIPOutputStream;
-import org.sonar.api.config.Configuration;
-import org.sonar.api.server.ServerSide;
-import org.sonar.api.utils.log.Logger;
-import org.sonar.api.utils.log.Loggers;
-import org.sonar.api.utils.log.Profiler;
-import org.sonar.server.plugins.PluginFilesAndMd5.FileAndMd5;
-
-@ServerSide
-public class PluginCompressor {
-
-  public static final String PROPERTY_PLUGIN_COMPRESSION_ENABLE = "sonar.pluginsCompression.enable";
-  private static final Logger LOG = Loggers.get(PluginCompressor.class);
-
-  private final Configuration configuration;
-
-  public PluginCompressor(Configuration configuration) {
-    this.configuration = configuration;
-  }
-
-  public boolean enabled() {
-    return configuration.getBoolean(PROPERTY_PLUGIN_COMPRESSION_ENABLE).orElse(false);
-  }
-
-  /**
-   * @param loadedJar the JAR loaded by classloaders. It differs from {@code jar}
-   *                  which is the initial location of JAR as seen by users
-   */
-  public PluginFilesAndMd5 compress(String key,  File jar, File loadedJar) {
-    Optional<File> compressed = compressJar(key, jar, loadedJar);
-    return new PluginFilesAndMd5(new FileAndMd5(loadedJar), compressed.map(FileAndMd5::new).orElse(null));
-  }
-
-  private Optional<File> compressJar(String key,  File jar, File loadedJar) {
-    if (!configuration.getBoolean(PROPERTY_PLUGIN_COMPRESSION_ENABLE).orElse(false)) {
-      return Optional.empty();
-    }
-
-    Path targetPack200 = getPack200Path(loadedJar.toPath());
-    Path sourcePack200Path = getPack200Path(jar.toPath());
-
-    // check if packed file was deployed alongside the jar. If that's the case, use it instead of generating it (SONAR-10395).
-    if (sourcePack200Path.toFile().exists()) {
-      try {
-        LOG.debug("Found pack200: " + sourcePack200Path);
-        Files.copy(sourcePack200Path, targetPack200);
-      } catch (IOException e) {
-        throw new IllegalStateException("Failed to copy pack200 file from " + sourcePack200Path + " to " + targetPack200, e);
-      }
-    } else {
-      pack200(loadedJar.toPath(), targetPack200, key);
-    }
-    return Optional.of(targetPack200.toFile());
-  }
-
-  private static void pack200(Path jarPath, Path toPack200Path, String pluginKey) {
-    Profiler profiler = Profiler.create(LOG);
-    profiler.startInfo("Compressing plugin " + pluginKey + " [pack200]");
-
-    try (JarInputStream in = new JarInputStream(new BufferedInputStream(Files.newInputStream(jarPath)));
-      OutputStream out = new GZIPOutputStream(new BufferedOutputStream(Files.newOutputStream(toPack200Path)))) {
-      Pack200.newPacker().pack(in, out);
-    } catch (IOException e) {
-      throw new IllegalStateException(String.format("Fail to pack200 plugin [%s] '%s' to '%s'", pluginKey, jarPath, toPack200Path), e);
-    }
-    profiler.stopInfo();
-  }
-
-  private static Path getPack200Path(Path jar) {
-    String jarFileName = jar.getFileName().toString();
-    String filename = jarFileName.substring(0, jarFileName.length() - 3) + "pack.gz";
-    return jar.resolveSibling(filename);
-  }
-}
diff --git a/server/sonar-webserver-api/src/main/java/org/sonar/server/plugins/ServerPlugin.java b/server/sonar-webserver-api/src/main/java/org/sonar/server/plugins/ServerPlugin.java
index 6d348d03094..11a6ce1418c 100644
--- a/server/sonar-webserver-api/src/main/java/org/sonar/server/plugins/ServerPlugin.java
+++ b/server/sonar-webserver-api/src/main/java/org/sonar/server/plugins/ServerPlugin.java
@@ -19,8 +19,6 @@
  */
 package org.sonar.server.plugins;
 
-import javax.annotation.CheckForNull;
-import javax.annotation.Nullable;
 import org.sonar.api.Plugin;
 import org.sonar.core.platform.PluginInfo;
 import org.sonar.core.plugin.PluginType;
@@ -31,19 +29,17 @@ public class ServerPlugin {
   private final PluginType type;
   private final Plugin instance;
   private final FileAndMd5 jar;
-  private final FileAndMd5 compressed;
   private final ClassLoader classloader;
 
-  public ServerPlugin(PluginInfo pluginInfo, PluginType type, Plugin instance, FileAndMd5 jar, @Nullable FileAndMd5 compressed) {
-    this(pluginInfo, type, instance, jar, compressed, instance.getClass().getClassLoader());
+  public ServerPlugin(PluginInfo pluginInfo, PluginType type, Plugin instance, FileAndMd5 jar) {
+    this(pluginInfo, type, instance, jar, instance.getClass().getClassLoader());
   }
 
-  public ServerPlugin(PluginInfo pluginInfo, PluginType type, Plugin instance, FileAndMd5 jar, @Nullable FileAndMd5 compressed, ClassLoader classloader) {
+  public ServerPlugin(PluginInfo pluginInfo, PluginType type, Plugin instance, FileAndMd5 jar, ClassLoader classloader) {
     this.pluginInfo = pluginInfo;
     this.type = type;
     this.instance = instance;
     this.jar = jar;
-    this.compressed = compressed;
     this.classloader = classloader;
   }
 
@@ -63,11 +59,6 @@ public class ServerPlugin {
     return jar;
   }
 
-  @CheckForNull
-  public FileAndMd5 getCompressed() {
-    return compressed;
-  }
-
   public ClassLoader getClassloader() {
     return classloader;
   }
diff --git a/server/sonar-webserver-api/src/main/java/org/sonar/server/plugins/ServerPluginManager.java b/server/sonar-webserver-api/src/main/java/org/sonar/server/plugins/ServerPluginManager.java
index 3b97129c13d..22dea0b6ed2 100644
--- a/server/sonar-webserver-api/src/main/java/org/sonar/server/plugins/ServerPluginManager.java
+++ b/server/sonar-webserver-api/src/main/java/org/sonar/server/plugins/ServerPluginManager.java
@@ -48,15 +48,13 @@ public class ServerPluginManager implements Startable {
   private final PluginJarLoader pluginJarLoader;
   private final PluginJarExploder pluginJarExploder;
   private final PluginClassLoader pluginClassLoader;
-  private final PluginCompressor pluginCompressor;
   private final ServerPluginRepository pluginRepository;
 
   public ServerPluginManager(PluginClassLoader pluginClassLoader, PluginJarExploder pluginJarExploder,
-    PluginJarLoader pluginJarLoader, PluginCompressor pluginCompressor, ServerPluginRepository pluginRepository) {
+    PluginJarLoader pluginJarLoader, ServerPluginRepository pluginRepository) {
     this.pluginClassLoader = pluginClassLoader;
     this.pluginJarExploder = pluginJarExploder;
     this.pluginJarLoader = pluginJarLoader;
-    this.pluginCompressor = pluginCompressor;
     this.pluginRepository = pluginRepository;
   }
 
@@ -67,7 +65,7 @@ public class ServerPluginManager implements Startable {
     Collection<ExplodedPlugin> explodedPlugins = extractPlugins(loadedPlugins);
     Map<String, Plugin> instancesByKey = pluginClassLoader.load(explodedPlugins);
     Map<String, PluginType> typesByKey = getTypesByKey(loadedPlugins);
-    List<ServerPlugin> plugins = compressAndCreateServerPlugins(explodedPlugins, instancesByKey, typesByKey);
+    List<ServerPlugin> plugins = createServerPlugins(explodedPlugins, instancesByKey, typesByKey);
     pluginRepository.addPlugins(plugins);
   }
 
@@ -88,12 +86,11 @@ public class ServerPluginManager implements Startable {
     return plugins.stream().map(pluginJarExploder::explode).collect(Collectors.toList());
   }
 
-  private List<ServerPlugin> compressAndCreateServerPlugins(Collection<ExplodedPlugin> explodedPlugins, Map<String, Plugin> instancesByKey, Map<String, PluginType> typseByKey) {
+  private static List<ServerPlugin> createServerPlugins(Collection<ExplodedPlugin> explodedPlugins, Map<String, Plugin> instancesByKey, Map<String, PluginType> typesByKey) {
     List<ServerPlugin> plugins = new ArrayList<>();
     for (ExplodedPlugin p : explodedPlugins) {
-      PluginFilesAndMd5 installedPlugin = pluginCompressor.compress(p.getKey(), p.getPluginInfo().getNonNullJarFile(), p.getMain());
-      plugins.add(new ServerPlugin(p.getPluginInfo(), typseByKey.get(p.getKey()), instancesByKey.get(p.getKey()),
-        installedPlugin.getLoadedJar(), installedPlugin.getCompressedJar()));
+      plugins.add(new ServerPlugin(p.getPluginInfo(), typesByKey.get(p.getKey()), instancesByKey.get(p.getKey()),
+        new PluginFilesAndMd5.FileAndMd5(p.getPluginInfo().getNonNullJarFile())));
     }
     return plugins;
   }
diff --git a/server/sonar-webserver-api/src/test/java/org/sonar/server/plugins/PluginCompressorTest.java b/server/sonar-webserver-api/src/test/java/org/sonar/server/plugins/PluginCompressorTest.java
deleted file mode 100644
index 0c75517d094..00000000000
--- a/server/sonar-webserver-api/src/test/java/org/sonar/server/plugins/PluginCompressorTest.java
+++ /dev/null
@@ -1,128 +0,0 @@
-/*
- * SonarQube
- * Copyright (C) 2009-2022 SonarSource SA
- * mailto:info AT sonarsource DOT com
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 3 of the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public License
- * along with this program; if not, write to the Free Software Foundation,
- * Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
- */
-package org.sonar.server.plugins;
-
-import java.io.File;
-import java.io.IOException;
-import java.nio.charset.StandardCharsets;
-import java.nio.file.Files;
-import java.nio.file.Path;
-import org.apache.commons.io.FileUtils;
-import org.apache.commons.lang.RandomStringUtils;
-import org.junit.Before;
-import org.junit.Rule;
-import org.junit.Test;
-import org.junit.rules.TemporaryFolder;
-import org.sonar.api.config.internal.MapSettings;
-
-import static org.assertj.core.api.Assertions.assertThat;
-import static org.sonar.server.plugins.PluginCompressor.PROPERTY_PLUGIN_COMPRESSION_ENABLE;
-
-public class PluginCompressorTest {
-  @Rule
-  public TemporaryFolder temp = new TemporaryFolder();
-
-  private MapSettings settings = new MapSettings();
-
-  @Before
-  public void setUp() throws IOException {
-    Path targetFolder = temp.newFolder("target").toPath();
-    Path targetJarPath = targetFolder.resolve("test.jar");
-    Files.createFile(targetJarPath);
-  }
-
-  @Test
-  public void compress_jar_if_compression_enabled() throws IOException {
-    File jar = touch(temp.newFolder(), "sonar-foo-plugin.jar");
-    // the JAR is copied somewhere else in order to be loaded by classloaders
-    File loadedJar = touch(temp.newFolder(), "sonar-foo-plugin.jar");
-
-    settings.setProperty(PROPERTY_PLUGIN_COMPRESSION_ENABLE, true);
-    PluginCompressor underTest = new PluginCompressor(settings.asConfig());
-
-    PluginFilesAndMd5 installedPlugin = underTest.compress("foo", jar, loadedJar);
-    assertThat(installedPlugin.getLoadedJar().getFile().toPath()).isEqualTo(loadedJar.toPath());
-    assertThat(installedPlugin.getCompressedJar().getFile())
-      .exists()
-      .isFile()
-      .hasName("sonar-foo-plugin.pack.gz")
-      .hasParent(loadedJar.getParentFile());
-  }
-
-  @Test
-  public void dont_compress_jar_if_compression_disable() throws IOException {
-    File jar = touch(temp.newFolder(), "sonar-foo-plugin.jar");
-    // the JAR is copied somewhere else in order to be loaded by classloaders
-    File loadedJar = touch(temp.newFolder(), "sonar-foo-plugin.jar");
-
-    settings.setProperty(PROPERTY_PLUGIN_COMPRESSION_ENABLE, false);
-    PluginCompressor underTest = new PluginCompressor(settings.asConfig());
-
-    PluginFilesAndMd5 installedPlugin = underTest.compress("foo", jar, loadedJar);
-    assertThat(installedPlugin.getLoadedJar().getFile().toPath()).isEqualTo(loadedJar.toPath());
-    assertThat(installedPlugin.getCompressedJar()).isNull();
-    assertThat(installedPlugin.getLoadedJar().getFile().getParentFile().listFiles()).containsOnly(loadedJar);
-  }
-
-  @Test
-  public void copy_and_use_existing_packed_jar_if_compression_enabled() throws IOException {
-    File jar = touch(temp.newFolder(), "sonar-foo-plugin.jar");
-    File packedJar = touch(jar.getParentFile(), "sonar-foo-plugin.pack.gz");
-    // the JAR is copied somewhere else in order to be loaded by classloaders
-    File loadedJar = touch(temp.newFolder(), "sonar-foo-plugin.jar");
-
-    settings.setProperty(PROPERTY_PLUGIN_COMPRESSION_ENABLE, true);
-    PluginCompressor underTest = new PluginCompressor(settings.asConfig());
-
-    PluginFilesAndMd5 installedPlugin = underTest.compress("foo", jar, loadedJar);
-    assertThat(installedPlugin.getLoadedJar().getFile().toPath()).isEqualTo(loadedJar.toPath());
-    assertThat(installedPlugin.getCompressedJar().getFile())
-      .exists()
-      .isFile()
-      .hasName(packedJar.getName())
-      .hasParent(loadedJar.getParentFile())
-      .hasSameTextualContentAs(packedJar);
-  }
-
-  private static File touch(File dir, String filename) throws IOException {
-    File file = new File(dir, filename);
-    FileUtils.write(file, RandomStringUtils.random(10), StandardCharsets.UTF_8);
-    return file;
-  }
-
-  //
-  // @Test
-  // public void should_use_deployed_packed_file() throws IOException {
-  // Path packedPath = sourceFolder.resolve("test.pack.gz");
-  // Files.write(packedPath, new byte[] {1, 2, 3});
-  //
-  // settings.setProperty(PROPERTY_PLUGIN_COMPRESSION_ENABLE, true);
-  // underTest = new PluginFileSystem(settings.asConfig());
-  // underTest.compressJar("key", sourceFolder, targetJarPath);
-  //
-  // assertThat(Files.list(targetFolder)).containsOnly(targetJarPath, targetFolder.resolve("test.pack.gz"));
-  // assertThat(underTest.getPlugins()).hasSize(1);
-  // assertThat(underTest.getPlugins().get("key").getFilename()).isEqualTo("test.pack.gz");
-  //
-  // // check that the file was copied, not generated
-  // assertThat(targetFolder.resolve("test.pack.gz")).hasSameContentAs(packedPath);
-  // }
-
-}
diff --git a/server/sonar-webserver-api/src/test/java/org/sonar/server/plugins/PluginUninstallerTest.java b/server/sonar-webserver-api/src/test/java/org/sonar/server/plugins/PluginUninstallerTest.java
index 5bf536717e1..8bbbdf7860d 100644
--- a/server/sonar-webserver-api/src/test/java/org/sonar/server/plugins/PluginUninstallerTest.java
+++ b/server/sonar-webserver-api/src/test/java/org/sonar/server/plugins/PluginUninstallerTest.java
@@ -162,7 +162,7 @@ public class PluginUninstallerTest {
 
   private static ServerPlugin newPlugin(ServerPluginInfo pluginInfo) {
     return new ServerPlugin(pluginInfo, pluginInfo.getType(), mock(Plugin.class),
-      mock(PluginFilesAndMd5.FileAndMd5.class), mock(PluginFilesAndMd5.FileAndMd5.class), mock(ClassLoader.class));
+      mock(PluginFilesAndMd5.FileAndMd5.class), mock(ClassLoader.class));
   }
 
   private File copyTestPluginTo(String testPluginName, File toDir) throws IOException {
diff --git a/server/sonar-webserver-api/src/test/java/org/sonar/server/plugins/ServerPluginManagerTest.java b/server/sonar-webserver-api/src/test/java/org/sonar/server/plugins/ServerPluginManagerTest.java
index 1075795185c..4164eb7c373 100644
--- a/server/sonar-webserver-api/src/test/java/org/sonar/server/plugins/ServerPluginManagerTest.java
+++ b/server/sonar-webserver-api/src/test/java/org/sonar/server/plugins/ServerPluginManagerTest.java
@@ -21,9 +21,11 @@ package org.sonar.server.plugins;
 
 import com.google.common.collect.ImmutableMap;
 import java.io.File;
+import java.io.IOException;
 import java.util.Arrays;
 import java.util.Collections;
 import java.util.Map;
+import org.jetbrains.annotations.NotNull;
 import org.junit.After;
 import org.junit.Rule;
 import org.junit.Test;
@@ -36,7 +38,7 @@ import org.sonar.server.plugins.PluginFilesAndMd5.FileAndMd5;
 import org.sonar.updatecenter.common.Version;
 
 import static org.assertj.core.api.Assertions.assertThat;
-import static org.assertj.core.api.Assertions.tuple;
+import static org.junit.Assert.assertEquals;
 import static org.mockito.ArgumentMatchers.anyList;
 import static org.mockito.Mockito.mock;
 import static org.mockito.Mockito.when;
@@ -50,9 +52,8 @@ public class ServerPluginManagerTest {
   private PluginClassLoader pluginClassLoader = mock(PluginClassLoader.class);
   private PluginJarExploder jarExploder = mock(PluginJarExploder.class);
   private PluginJarLoader jarLoader = mock(PluginJarLoader.class);
-  private PluginCompressor pluginCompressor = mock(PluginCompressor.class);
   private ServerPluginRepository pluginRepository = new ServerPluginRepository();
-  private ServerPluginManager underTest = new ServerPluginManager(pluginClassLoader, jarExploder, jarLoader, pluginCompressor, pluginRepository);
+  private ServerPluginManager underTest = new ServerPluginManager(pluginClassLoader, jarExploder, jarLoader, pluginRepository);
 
   @After
   public void tearDown() {
@@ -69,18 +70,20 @@ public class ServerPluginManagerTest {
 
     Map<String, Plugin> instances = ImmutableMap.of("p1", mock(Plugin.class), "p2", mock(Plugin.class));
     when(pluginClassLoader.load(anyList())).thenReturn(instances);
-    PluginFilesAndMd5 p1Files = newPluginFilesAndMd5("p1");
-    PluginFilesAndMd5 p2Files = newPluginFilesAndMd5("p2");
-
-    when(pluginCompressor.compress("p1", new File("p1.jar"), new File("p1Exploded.jar"))).thenReturn(p1Files);
-    when(pluginCompressor.compress("p2", new File("p2.jar"), new File("p2Exploded.jar"))).thenReturn(p2Files);
 
     underTest.start();
 
-    assertThat(pluginRepository.getPlugins())
-      .extracting(ServerPlugin::getPluginInfo, ServerPlugin::getCompressed, ServerPlugin::getJar, ServerPlugin::getInstance)
-      .containsOnly(tuple(p1, p1Files.getCompressedJar(), p1Files.getLoadedJar(), instances.get("p1")),
-        tuple(p2, p2Files.getCompressedJar(), p2Files.getLoadedJar(), instances.get("p2")));
+    assertEquals(2, pluginRepository.getPlugins().size());
+
+    assertEquals(p1, pluginRepository.getPlugin("p1").getPluginInfo());
+    assertEquals(newFileAndMd5(p1.getNonNullJarFile()).getFile(), pluginRepository.getPlugin("p1").getJar().getFile());
+    assertEquals(newFileAndMd5(p1.getNonNullJarFile()).getMd5(), pluginRepository.getPlugin("p1").getJar().getMd5());
+    assertEquals(instances.get("p1"), pluginRepository.getPlugin("p1").getInstance());
+
+    assertEquals(p2, pluginRepository.getPlugin("p2").getPluginInfo());
+    assertEquals(newFileAndMd5(p2.getNonNullJarFile()).getFile(), pluginRepository.getPlugin("p2").getJar().getFile());
+    assertEquals(newFileAndMd5(p2.getNonNullJarFile()).getMd5(), pluginRepository.getPlugin("p2").getJar().getMd5());
+    assertEquals(instances.get("p2"), pluginRepository.getPlugin("p2").getInstance());
 
     assertThat(pluginRepository.getPlugins()).extracting(ServerPlugin::getPluginInfo)
       .allMatch(p -> logTester.logs().contains(String.format("Deploy %s / %s / %s", p.getName(), p.getVersion(), p.getImplementationBuild())));
@@ -90,7 +93,7 @@ public class ServerPluginManagerTest {
     ServerPluginInfo pluginInfo = mock(ServerPluginInfo.class);
     when(pluginInfo.getKey()).thenReturn(key);
     when(pluginInfo.getType()).thenReturn(EXTERNAL);
-    when(pluginInfo.getNonNullJarFile()).thenReturn(new File(key + ".jar"));
+    when(pluginInfo.getNonNullJarFile()).thenReturn(getJarFile(key));
     when(pluginInfo.getName()).thenReturn(key + "_name");
     Version version = mock(Version.class);
     when(version.getName()).thenReturn(key + "_version");
@@ -99,15 +102,18 @@ public class ServerPluginManagerTest {
     return pluginInfo;
   }
 
-  private static PluginFilesAndMd5 newPluginFilesAndMd5(String name) {
-    FileAndMd5 jar = mock(FileAndMd5.class);
-    when(jar.getFile()).thenReturn(new File(name));
-    when(jar.getMd5()).thenReturn(name + "-md5");
-
-    FileAndMd5 compressed = mock(FileAndMd5.class);
-    when(compressed.getFile()).thenReturn(new File(name + "-compressed"));
-    when(compressed.getMd5()).thenReturn(name + "-compressed-md5");
+  @NotNull
+  private static File getJarFile(String key) {
+    File file = new File(key + ".jar");
+    try {
+      file.createNewFile();
+    } catch (IOException e) {
+      throw new RuntimeException(e);
+    }
+    return file;
+  }
 
-    return new PluginFilesAndMd5(jar, compressed);
+  private static FileAndMd5 newFileAndMd5(File file) {
+    return new PluginFilesAndMd5.FileAndMd5(file);
   }
 }
diff --git a/server/sonar-webserver-api/src/test/java/org/sonar/server/plugins/ServerPluginRepositoryTest.java b/server/sonar-webserver-api/src/test/java/org/sonar/server/plugins/ServerPluginRepositoryTest.java
index f5250e05951..f66e2adfa7f 100644
--- a/server/sonar-webserver-api/src/test/java/org/sonar/server/plugins/ServerPluginRepositoryTest.java
+++ b/server/sonar-webserver-api/src/test/java/org/sonar/server/plugins/ServerPluginRepositoryTest.java
@@ -133,6 +133,6 @@ public class ServerPluginRepositoryTest {
   }
 
   private ServerPlugin newPlugin(String key, PluginType type) {
-    return new ServerPlugin(newPluginInfo(key), type, mock(Plugin.class), mock(FileAndMd5.class), mock(FileAndMd5.class), mock(ClassLoader.class));
+    return new ServerPlugin(newPluginInfo(key), type, mock(Plugin.class), mock(FileAndMd5.class), mock(ClassLoader.class));
   }
 }
diff --git a/server/sonar-webserver-core/src/test/java/org/sonar/server/startup/GeneratePluginIndexTest.java b/server/sonar-webserver-core/src/test/java/org/sonar/server/startup/GeneratePluginIndexTest.java
index 3ee07bdac88..2b81fcdb5a7 100644
--- a/server/sonar-webserver-core/src/test/java/org/sonar/server/startup/GeneratePluginIndexTest.java
+++ b/server/sonar-webserver-core/src/test/java/org/sonar/server/startup/GeneratePluginIndexTest.java
@@ -86,6 +86,6 @@ public class GeneratePluginIndexTest {
   private ServerPlugin newInstalledPlugin(String key, boolean supportSonarLint) throws IOException {
     FileAndMd5 jar = new FileAndMd5(temp.newFile());
     PluginInfo pluginInfo = new PluginInfo(key).setJarFile(jar.getFile()).setSonarLintSupported(supportSonarLint);
-    return new ServerPlugin(pluginInfo, BUNDLED, null, jar, null, null);
+    return new ServerPlugin(pluginInfo, BUNDLED, null, jar, null);
   }
 }
diff --git a/server/sonar-webserver-core/src/test/java/org/sonar/server/startup/RegisterPluginsTest.java b/server/sonar-webserver-core/src/test/java/org/sonar/server/startup/RegisterPluginsTest.java
index 138453f914b..39446aca905 100644
--- a/server/sonar-webserver-core/src/test/java/org/sonar/server/startup/RegisterPluginsTest.java
+++ b/server/sonar-webserver-core/src/test/java/org/sonar/server/startup/RegisterPluginsTest.java
@@ -210,7 +210,7 @@ public class RegisterPluginsTest {
     PluginInfo info = new PluginInfo(key)
       .setBasePlugin(basePlugin)
       .setJarFile(file);
-    ServerPlugin serverPlugin = new ServerPlugin(info, type, null, jar, null, null);
+    ServerPlugin serverPlugin = new ServerPlugin(info, type, null, jar, null);
     serverPluginRepository.addPlugin(serverPlugin);
     return serverPlugin;
   }
diff --git a/server/sonar-webserver-webapi/src/main/java/org/sonar/server/plugins/ws/DownloadAction.java b/server/sonar-webserver-webapi/src/main/java/org/sonar/server/plugins/ws/DownloadAction.java
index fe7a6b08f9d..ba691a274f0 100644
--- a/server/sonar-webserver-webapi/src/main/java/org/sonar/server/plugins/ws/DownloadAction.java
+++ b/server/sonar-webserver-webapi/src/main/java/org/sonar/server/plugins/ws/DownloadAction.java
@@ -23,6 +23,7 @@ import java.io.InputStream;
 import java.util.Optional;
 import org.apache.commons.io.FileUtils;
 import org.apache.commons.io.IOUtils;
+import org.sonar.api.server.ws.Change;
 import org.sonar.api.server.ws.Request;
 import org.sonar.api.server.ws.Response;
 import org.sonar.api.server.ws.WebService;
@@ -32,9 +33,6 @@ import org.sonar.server.plugins.ServerPlugin;
 import org.sonar.server.plugins.ServerPluginRepository;
 
 public class DownloadAction implements PluginsWsAction {
-
-  private static final String PACK200 = "pack200";
-  private static final String ACCEPT_COMPRESSIONS_PARAM = "acceptCompressions";
   private static final String PLUGIN_PARAM = "plugin";
 
   private final ServerPluginRepository pluginRepository;
@@ -57,8 +55,7 @@ public class DownloadAction implements PluginsWsAction {
       .setDescription("The key identifying the plugin to download")
       .setExampleValue("cobol");
 
-    action.createParam(ACCEPT_COMPRESSIONS_PARAM)
-      .setExampleValue(PACK200);
+    action.setChangelog(new Change("9.8", "Parameter 'acceptCompressions' removed"));
   }
 
   @Override
@@ -71,17 +68,10 @@ public class DownloadAction implements PluginsWsAction {
     }
 
     FileAndMd5 downloadedFile;
-    FileAndMd5 compressedJar = file.get().getCompressed();
-    if (compressedJar != null && PACK200.equals(request.param(ACCEPT_COMPRESSIONS_PARAM))) {
-      response.stream().setMediaType("application/octet-stream");
 
-      response.setHeader("Sonar-Compression", PACK200);
-      response.setHeader("Sonar-UncompressedMD5", file.get().getJar().getMd5());
-      downloadedFile = compressedJar;
-    } else {
-      response.stream().setMediaType("application/java-archive");
-      downloadedFile = file.get().getJar();
-    }
+    response.stream().setMediaType("application/java-archive");
+    downloadedFile = file.get().getJar();
+
     response.setHeader("Sonar-MD5", downloadedFile.getMd5());
     try (InputStream input = FileUtils.openInputStream(downloadedFile.getFile())) {
       IOUtils.copyLarge(input, response.stream().output());
diff --git a/server/sonar-webserver-webapi/src/test/java/org/sonar/server/plugins/ws/DownloadActionTest.java b/server/sonar-webserver-webapi/src/test/java/org/sonar/server/plugins/ws/DownloadActionTest.java
index 188f8788016..6ecb84d7770 100644
--- a/server/sonar-webserver-webapi/src/test/java/org/sonar/server/plugins/ws/DownloadActionTest.java
+++ b/server/sonar-webserver-webapi/src/test/java/org/sonar/server/plugins/ws/DownloadActionTest.java
@@ -24,9 +24,11 @@ import java.io.IOException;
 import java.util.Optional;
 import org.apache.commons.io.FileUtils;
 import org.apache.commons.io.IOUtils;
+import org.assertj.core.groups.Tuple;
 import org.junit.Rule;
 import org.junit.Test;
 import org.junit.rules.TemporaryFolder;
+import org.sonar.api.server.ws.Change;
 import org.sonar.api.server.ws.WebService;
 import org.sonar.core.platform.PluginInfo;
 import org.sonar.server.exceptions.NotFoundException;
@@ -61,7 +63,10 @@ public class DownloadActionTest {
     assertThat(def.since()).isEqualTo("7.2");
     assertThat(def.params())
       .extracting(WebService.Param::key)
-      .containsExactlyInAnyOrder("plugin", "acceptCompressions");
+      .containsExactlyInAnyOrder("plugin");
+    assertThat(def.changelog())
+      .extracting(Change::getVersion, Change::getDescription)
+      .containsExactlyInAnyOrder(new Tuple("9.8", "Parameter 'acceptCompressions' removed"));
   }
 
   @Test
@@ -88,65 +93,9 @@ public class DownloadActionTest {
     verifySameContent(response, plugin.getJar().getFile());
   }
 
-  @Test
-  public void return_uncompressed_jar_if_client_does_not_accept_compression() throws Exception {
-    ServerPlugin plugin = newCompressedPlugin();
-    when(serverPluginRepository.findPlugin(plugin.getPluginInfo().getKey())).thenReturn(Optional.of(plugin));
-
-    TestResponse response = tester.newRequest()
-      .setParam("plugin", plugin.getPluginInfo().getKey())
-      .execute();
-
-    assertThat(response.getHeader("Sonar-MD5")).isEqualTo(plugin.getJar().getMd5());
-    assertThat(response.getHeader("Sonar-Compression")).isNull();
-    assertThat(response.getHeader("Sonar-UncompressedMD5")).isNull();
-    assertThat(response.getMediaType()).isEqualTo("application/java-archive");
-    verifySameContent(response, plugin.getJar().getFile());
-  }
-
-  @Test
-  public void return_uncompressed_jar_if_client_requests_unsupported_compression() throws Exception {
-    ServerPlugin plugin = newCompressedPlugin();
-    when(serverPluginRepository.findPlugin(plugin.getPluginInfo().getKey())).thenReturn(Optional.of(plugin));
-
-    TestResponse response = tester.newRequest()
-      .setParam("plugin", plugin.getPluginInfo().getKey())
-      .setParam("acceptCompressions", "zip")
-      .execute();
-
-    assertThat(response.getHeader("Sonar-MD5")).isEqualTo(plugin.getJar().getMd5());
-    assertThat(response.getHeader("Sonar-Compression")).isNull();
-    assertThat(response.getHeader("Sonar-UncompressedMD5")).isNull();
-    assertThat(response.getMediaType()).isEqualTo("application/java-archive");
-    verifySameContent(response, plugin.getJar().getFile());
-  }
-
-  @Test
-  public void return_compressed_jar_if_client_accepts_pack200() throws Exception {
-    ServerPlugin plugin = newCompressedPlugin();
-    when(serverPluginRepository.findPlugin(plugin.getPluginInfo().getKey())).thenReturn(Optional.of(plugin));
-
-    TestResponse response = tester.newRequest()
-      .setParam("plugin", plugin.getPluginInfo().getKey())
-      .setParam("acceptCompressions", "pack200")
-      .execute();
-
-    assertThat(response.getHeader("Sonar-MD5")).isEqualTo(plugin.getCompressed().getMd5());
-    assertThat(response.getHeader("Sonar-UncompressedMD5")).isEqualTo(plugin.getJar().getMd5());
-    assertThat(response.getHeader("Sonar-Compression")).isEqualTo("pack200");
-    assertThat(response.getMediaType()).isEqualTo("application/octet-stream");
-    verifySameContent(response, plugin.getCompressed().getFile());
-  }
-
   private ServerPlugin newPlugin() throws IOException {
     FileAndMd5 jar = new FileAndMd5(temp.newFile());
-    return new ServerPlugin(new PluginInfo("foo"), PluginType.BUNDLED, null, jar, null, null);
-  }
-
-  private ServerPlugin newCompressedPlugin() throws IOException {
-    FileAndMd5 jar = new FileAndMd5(temp.newFile());
-    FileAndMd5 compressedJar = new FileAndMd5(temp.newFile());
-    return new ServerPlugin(new PluginInfo("foo"), PluginType.BUNDLED, null, jar, compressedJar, null);
+    return new ServerPlugin(new PluginInfo("foo"), PluginType.BUNDLED, null, jar, null);
   }
 
   private static void verifySameContent(TestResponse response, File file) throws IOException {
diff --git a/server/sonar-webserver-webapi/src/test/java/org/sonar/server/plugins/ws/InstalledActionTest.java b/server/sonar-webserver-webapi/src/test/java/org/sonar/server/plugins/ws/InstalledActionTest.java
index 208032a9a7e..1a456b82e8c 100644
--- a/server/sonar-webserver-webapi/src/test/java/org/sonar/server/plugins/ws/InstalledActionTest.java
+++ b/server/sonar-webserver-webapi/src/test/java/org/sonar/server/plugins/ws/InstalledActionTest.java
@@ -211,13 +211,7 @@ public class InstalledActionTest {
 
   private ServerPlugin newInstalledPlugin(PluginInfo plugin, PluginType type) throws IOException {
     FileAndMd5 jar = new FileAndMd5(temp.newFile());
-    return new ServerPlugin(plugin, type, null, jar, null, null);
-  }
-
-  private ServerPlugin newInstalledPluginWithCompression(PluginInfo plugin) throws IOException {
-    FileAndMd5 jar = new FileAndMd5(temp.newFile());
-    FileAndMd5 compressedJar = new FileAndMd5(temp.newFile());
-    return new ServerPlugin(plugin, PluginType.BUNDLED, null, jar, compressedJar, null);
+    return new ServerPlugin(plugin, type, null, jar, null);
   }
 
   @Test
@@ -268,56 +262,6 @@ public class InstalledActionTest {
   }
 
   @Test
-  public void return_compression_fields_if_available() throws Exception {
-    ServerPlugin plugin = newInstalledPluginWithCompression(new PluginInfo("foo")
-      .setName("plugName")
-      .setDescription("desc_it")
-      .setVersion(Version.create("1.0"))
-      .setLicense("license_hey")
-      .setOrganizationName("org_name")
-      .setOrganizationUrl("org_url")
-      .setHomepageUrl("homepage_url")
-      .setIssueTrackerUrl("issueTracker_url")
-      .setImplementationBuild("sou_rev_sha1")
-      .setDocumentationPath("static/documentation.md")
-      .setSonarLintSupported(true));
-    when(serverPluginRepository.getPlugins()).thenReturn(singletonList(plugin));
-
-    db.pluginDbTester().insertPlugin(
-      p -> p.setKee(plugin.getPluginInfo().getKey()),
-      p -> p.setType(Type.EXTERNAL),
-      p -> p.setUpdatedAt(100L));
-
-    String response = tester.newRequest().execute().getInput();
-
-    verifyNoInteractions(updateCenterMatrixFactory);
-    assertJson(response).isSimilarTo(
-      "{" +
-        "  \"plugins\":" +
-        "  [" +
-        "    {" +
-        "      \"key\": \"foo\"," +
-        "      \"name\": \"plugName\"," +
-        "      \"description\": \"desc_it\"," +
-        "      \"version\": \"1.0\"," +
-        "      \"license\": \"license_hey\"," +
-        "      \"organizationName\": \"org_name\"," +
-        "      \"organizationUrl\": \"org_url\",\n" +
-        "      \"editionBundled\": false," +
-        "      \"homepageUrl\": \"homepage_url\"," +
-        "      \"issueTrackerUrl\": \"issueTracker_url\"," +
-        "      \"implementationBuild\": \"sou_rev_sha1\"," +
-        "      \"sonarLintSupported\": true," +
-        "      \"documentationPath\": \"static/documentation.md\"," +
-        "      \"filename\": \"" + plugin.getJar().getFile().getName() + "\"," +
-        "      \"hash\": \"" + plugin.getJar().getMd5() + "\"," +
-        "      \"updatedAt\": 100" +
-        "    }" +
-        "  ]" +
-        "}");
-  }
-
-  @Test
   public void category_is_returned_when_in_additional_fields() throws Exception {
     String jarFilename = getClass().getSimpleName() + "/" + "some.jar";
     File jar = new File(getClass().getResource(jarFilename).toURI());
@@ -433,7 +377,7 @@ public class InstalledActionTest {
         .setImplementationBuild("sou_rev_sha1"),
         PluginType.BUNDLED,
         null,
-        new FileAndMd5(jar), new FileAndMd5(jar), null)));
+        new FileAndMd5(jar), null)));
     db.pluginDbTester().insertPlugin(
       p -> p.setKee(pluginKey),
       p -> p.setType(Type.BUNDLED),
@@ -506,7 +450,7 @@ public class InstalledActionTest {
       .setName(name)
       .setVersion(Version.create("1.0"));
     info.setJarFile(file);
-    return new ServerPlugin(info, PluginType.BUNDLED, null, new FileAndMd5(file), null, null);
+    return new ServerPlugin(info, PluginType.BUNDLED, null, new FileAndMd5(file), null);
   }
 
 }
diff --git a/server/sonar-webserver/src/main/java/org/sonar/server/platform/platformlevel/PlatformLevel2.java b/server/sonar-webserver/src/main/java/org/sonar/server/platform/platformlevel/PlatformLevel2.java
index b1dbde2980d..c0e02db9199 100644
--- a/server/sonar-webserver/src/main/java/org/sonar/server/platform/platformlevel/PlatformLevel2.java
+++ b/server/sonar-webserver/src/main/java/org/sonar/server/platform/platformlevel/PlatformLevel2.java
@@ -39,7 +39,6 @@ import org.sonar.server.platform.db.migration.charset.DatabaseCharsetChecker;
 import org.sonar.server.platform.db.migration.version.DatabaseVersion;
 import org.sonar.server.platform.web.WebPagesCache;
 import org.sonar.server.plugins.InstalledPluginReferentialFactory;
-import org.sonar.server.plugins.PluginCompressor;
 import org.sonar.server.plugins.PluginJarLoader;
 import org.sonar.server.plugins.ServerPluginJarExploder;
 import org.sonar.server.plugins.ServerPluginManager;
@@ -75,7 +74,6 @@ public class PlatformLevel2 extends PlatformLevel {
       ServerPluginManager.class,
       ServerPluginJarExploder.class,
       PluginClassLoader.class,
-      PluginCompressor.class,
       PluginClassloaderFactory.class,
       InstalledPluginReferentialFactory.class,
       WebServerExtensionInstaller.class,
diff --git a/server/sonar-webserver/src/test/java/org/sonar/server/platform/platformlevel/PlatformLevel2Test.java b/server/sonar-webserver/src/test/java/org/sonar/server/platform/platformlevel/PlatformLevel2Test.java
index 145a1f9e6fe..2b4344647da 100644
--- a/server/sonar-webserver/src/test/java/org/sonar/server/platform/platformlevel/PlatformLevel2Test.java
+++ b/server/sonar-webserver/src/test/java/org/sonar/server/platform/platformlevel/PlatformLevel2Test.java
@@ -73,7 +73,7 @@ public class PlatformLevel2Test {
 
     verify(container).add(ServerPluginRepository.class);
     verify(container).add(DatabaseCharsetChecker.class);
-    verify(container, times(23)).add(any());
+    verify(container, times(22)).add(any());
   }
 
   @Test
@@ -94,7 +94,7 @@ public class PlatformLevel2Test {
 
     verify(container).add(ServerPluginRepository.class);
     verify(container, never()).add(DatabaseCharsetChecker.class);
-    verify(container, times(21)).add(any());
+    verify(container, times(20)).add(any());
   }
 
 
diff --git a/sonar-scanner-engine/src/main/java/org/sonar/scanner/bootstrap/PluginFiles.java b/sonar-scanner-engine/src/main/java/org/sonar/scanner/bootstrap/PluginFiles.java
index 8e31b44d4ad..850d0e47a81 100644
--- a/sonar-scanner-engine/src/main/java/org/sonar/scanner/bootstrap/PluginFiles.java
+++ b/sonar-scanner-engine/src/main/java/org/sonar/scanner/bootstrap/PluginFiles.java
@@ -20,7 +20,6 @@
 package org.sonar.scanner.bootstrap;
 
 import java.io.BufferedInputStream;
-import java.io.BufferedOutputStream;
 import java.io.File;
 import java.io.IOException;
 import java.io.InputStream;
@@ -28,10 +27,7 @@ import java.net.HttpURLConnection;
 import java.nio.file.Files;
 import java.util.Objects;
 import java.util.Optional;
-import java.util.jar.JarOutputStream;
-import java.util.jar.Pack200;
 import java.util.stream.Stream;
-import java.util.zip.GZIPInputStream;
 import org.apache.commons.codec.digest.DigestUtils;
 import org.apache.commons.io.FileUtils;
 import org.sonar.api.config.Configuration;
@@ -48,9 +44,6 @@ public class PluginFiles {
 
   private static final Logger LOGGER = Loggers.get(PluginFiles.class);
   private static final String MD5_HEADER = "Sonar-MD5";
-  private static final String COMPRESSION_HEADER = "Sonar-Compression";
-  private static final String PACK200 = "pack200";
-  private static final String UNCOMPRESSED_MD5_HEADER = "Sonar-UncompressedMD5";
 
   private final DefaultScannerWsClient wsClient;
   private final File cacheDir;
@@ -94,13 +87,6 @@ public class PluginFiles {
       .setParam("plugin", plugin.key)
       .setTimeOutInMs(5 * 60_000);
 
-    try {
-      Class.forName("java.util.jar.Pack200");
-      request.setParam("acceptCompressions", PACK200);
-    } catch (ClassNotFoundException e) {
-      // ignore and don't use any compression
-    }
-
     File downloadedFile = newTempFile();
     LOGGER.debug("Download plugin '{}' to '{}'", plugin.key, downloadedFile);
 
@@ -123,15 +109,9 @@ public class PluginFiles {
       // un-compress if needed
       String cacheMd5;
       File tempJar;
-      Optional<String> compression = response.header(COMPRESSION_HEADER);
-      if (compression.isPresent() && PACK200.equals(compression.get())) {
-        tempJar = unpack200(plugin.key, downloadedFile);
-        cacheMd5 = response.header(UNCOMPRESSED_MD5_HEADER).orElseThrow(() -> new IllegalStateException(format(
-          "Fail to download plugin [%s]. Request to %s did not return header %s.", plugin.key, response.requestUrl(), UNCOMPRESSED_MD5_HEADER)));
-      } else {
-        tempJar = downloadedFile;
-        cacheMd5 = expectedMd5.get();
-      }
+
+      tempJar = downloadedFile;
+      cacheMd5 = expectedMd5.get();
 
       // put in cache
       File jarInCache = jarInCache(plugin.key, cacheMd5);
@@ -177,18 +157,6 @@ public class PluginFiles {
     }
   }
 
-  private File unpack200(String pluginKey, File compressedFile) {
-    LOGGER.debug("Unpacking plugin {}", pluginKey);
-    File jar = newTempFile();
-    try (InputStream input = new GZIPInputStream(new BufferedInputStream(FileUtils.openInputStream(compressedFile)));
-      JarOutputStream output = new JarOutputStream(new BufferedOutputStream(FileUtils.openOutputStream(jar)))) {
-      Pack200.newUnpacker().unpack(input, output);
-    } catch (IOException e) {
-      throw new IllegalStateException(format("Fail to download plugin [%s]. Pack200 error.", pluginKey), e);
-    }
-    return jar;
-  }
-
   private static String computeMd5(File file) {
     try (InputStream fis = new BufferedInputStream(FileUtils.openInputStream(file))) {
       return DigestUtils.md5Hex(fis);
diff --git a/sonar-scanner-engine/src/test/java/org/sonar/scanner/bootstrap/PluginFilesTest.java b/sonar-scanner-engine/src/test/java/org/sonar/scanner/bootstrap/PluginFilesTest.java
index 233028242bd..f10f1659a66 100644
--- a/sonar-scanner-engine/src/test/java/org/sonar/scanner/bootstrap/PluginFilesTest.java
+++ b/sonar-scanner-engine/src/test/java/org/sonar/scanner/bootstrap/PluginFilesTest.java
@@ -19,26 +19,15 @@
  */
 package org.sonar.scanner.bootstrap;
 
-import java.io.BufferedInputStream;
-import java.io.BufferedOutputStream;
-import java.io.ByteArrayOutputStream;
 import java.io.File;
 import java.io.IOException;
 import java.io.InputStream;
-import java.io.OutputStream;
-import java.nio.file.Files;
 import java.util.Collections;
 import java.util.Optional;
-import java.util.jar.JarInputStream;
-import java.util.jar.JarOutputStream;
-import java.util.jar.Pack200;
-import java.util.zip.GZIPInputStream;
-import java.util.zip.GZIPOutputStream;
 import javax.annotation.Nullable;
 import okhttp3.HttpUrl;
 import okhttp3.mockwebserver.MockResponse;
 import okhttp3.mockwebserver.MockWebServer;
-import okhttp3.mockwebserver.RecordedRequest;
 import okio.Buffer;
 import org.apache.commons.codec.digest.DigestUtils;
 import org.apache.commons.io.FileUtils;
@@ -107,7 +96,7 @@ public class PluginFilesTest {
     verifySameContent(result, tempJar);
     HttpUrl requestedUrl = server.takeRequest().getRequestUrl();
     assertThat(requestedUrl.encodedPath()).isEqualTo("/api/plugins/download");
-    assertThat(requestedUrl.encodedQuery()).isEqualTo("plugin=foo&acceptCompressions=pack200");
+    assertThat(requestedUrl.encodedQuery()).isEqualTo("plugin=foo");
 
     // get from cache on second call
     result = underTest.get(plugin).get();
@@ -116,24 +105,6 @@ public class PluginFilesTest {
   }
 
   @Test
-  public void download_compressed_and_add_uncompressed_to_cache_if_missing() throws Exception {
-    FileAndMd5 jar = new FileAndMd5();
-    enqueueCompressedDownload(jar, true);
-
-    InstalledPlugin plugin = newInstalledPlugin("foo", jar.md5);
-    File result = underTest.get(plugin).get();
-
-    verifySameContentAfterCompression(jar.file, result);
-    RecordedRequest recordedRequest = server.takeRequest();
-    assertThat(recordedRequest.getRequestUrl().queryParameter("acceptCompressions")).isEqualTo("pack200");
-
-    // get from cache on second call
-    result = underTest.get(plugin).get();
-    verifySameContentAfterCompression(jar.file, result);
-    assertThat(server.getRequestCount()).isOne();
-  }
-
-  @Test
   public void return_empty_if_plugin_not_found_on_server() {
     server.enqueue(new MockResponse().setResponseCode(404));
 
@@ -154,16 +125,6 @@ public class PluginFilesTest {
   }
 
   @Test
-  public void fail_if_integrity_of_compressed_download_is_not_valid() throws Exception {
-    FileAndMd5 jar = new FileAndMd5();
-    enqueueCompressedDownload(jar, false);
-
-    InstalledPlugin plugin = newInstalledPlugin("foo", jar.md5);
-
-    expectISE("foo", "was expected to have checksum invalid_hash but had ", () -> underTest.get(plugin).get());
-  }
-
-  @Test
   public void fail_if_md5_header_is_missing_from_response() throws IOException {
     File tempJar = temp.newFile();
     enqueueDownload(tempJar, null);
@@ -173,19 +134,6 @@ public class PluginFilesTest {
   }
 
   @Test
-  public void fail_if_compressed_download_cannot_be_uncompressed() {
-    MockResponse response = new MockResponse().setBody("not binary");
-    response.setHeader("Sonar-MD5", DigestUtils.md5Hex("not binary"));
-    response.setHeader("Sonar-UncompressedMD5", "abc");
-    response.setHeader("Sonar-Compression", "pack200");
-    server.enqueue(response);
-
-    InstalledPlugin plugin = newInstalledPlugin("foo", "abc");
-
-    expectISE("foo", "Pack200 error", () -> underTest.get(plugin).get());
-  }
-
-  @Test
   public void fail_if_server_returns_error() {
     server.enqueue(new MockResponse().setResponseCode(500));
     InstalledPlugin plugin = newInstalledPlugin("foo", "abc");
@@ -260,26 +208,6 @@ public class PluginFilesTest {
     server.enqueue(response);
   }
 
-  /**
-   * Enqueue download of file with a MD5 that may not be returned (null) or not valid
-   */
-  private void enqueueCompressedDownload(FileAndMd5 jar, boolean validMd5) throws IOException {
-    Buffer body = new Buffer();
-
-    ByteArrayOutputStream bytes = new ByteArrayOutputStream();
-    try (JarInputStream in = new JarInputStream(new BufferedInputStream(Files.newInputStream(jar.file.toPath())));
-         OutputStream output = new GZIPOutputStream(new BufferedOutputStream(bytes))) {
-      Pack200.newPacker().pack(in, output);
-    }
-    body.write(bytes.toByteArray());
-
-    MockResponse response = new MockResponse().setBody(body);
-    response.setHeader("Sonar-MD5", validMd5 ? DigestUtils.md5Hex(bytes.toByteArray()) : "invalid_hash");
-    response.setHeader("Sonar-UncompressedMD5", jar.md5);
-    response.setHeader("Sonar-Compression", "pack200");
-    server.enqueue(response);
-  }
-
   private static InstalledPlugin newInstalledPlugin(String pluginKey, String fileChecksum) {
     InstalledPlugin plugin = new InstalledPlugin();
     plugin.key = pluginKey;
@@ -293,33 +221,6 @@ public class PluginFilesTest {
     assertThat(file1).hasSameContentAs(file2.file);
   }
 
-  /**
-   * Packing and unpacking a JAR generates a different file.
-   */
-  private void verifySameContentAfterCompression(File file1, File file2) throws IOException {
-    assertThat(file1).isFile().exists();
-    assertThat(file2).isFile().exists();
-    assertThat(packAndUnpackJar(file1)).hasSameContentAs(packAndUnpackJar(file2));
-  }
-
-  private File packAndUnpackJar(File source) throws IOException {
-    File packed = temp.newFile();
-    try (JarInputStream in = new JarInputStream(new BufferedInputStream(Files.newInputStream(source.toPath())));
-         OutputStream out = new GZIPOutputStream(new BufferedOutputStream(Files.newOutputStream(packed.toPath())))) {
-      Pack200.newPacker().pack(in, out);
-    }
-
-    File to = temp.newFile();
-    try (InputStream input = new GZIPInputStream(new BufferedInputStream(Files.newInputStream(packed.toPath())));
-         JarOutputStream output = new JarOutputStream(new BufferedOutputStream(Files.newOutputStream(to.toPath())))) {
-      Pack200.newUnpacker().unpack(input, output);
-    } catch (IOException e) {
-      throw new IllegalStateException(e);
-    }
-
-    return to;
-  }
-
   private void expectISE(String pluginKey, String message, ThrowingCallable shouldRaiseThrowable) {
     assertThatThrownBy(shouldRaiseThrowable)
       .isInstanceOf(IllegalStateException.class)
diff --git a/sonar-ws/src/main/java/org/sonarqube/ws/client/plugins/DownloadRequest.java b/sonar-ws/src/main/java/org/sonarqube/ws/client/plugins/DownloadRequest.java
index ec95bde0f28..5c9fd234229 100644
--- a/sonar-ws/src/main/java/org/sonarqube/ws/client/plugins/DownloadRequest.java
+++ b/sonar-ws/src/main/java/org/sonarqube/ws/client/plugins/DownloadRequest.java
@@ -29,23 +29,9 @@ import javax.annotation.Generated;
  */
 @Generated("sonar-ws-generator")
 public class DownloadRequest {
-
-  private String acceptCompressions;
   private String plugin;
 
   /**
-   * Example value: "pack200"
-   */
-  public DownloadRequest setAcceptCompressions(String acceptCompressions) {
-    this.acceptCompressions = acceptCompressions;
-    return this;
-  }
-
-  public String getAcceptCompressions() {
-    return acceptCompressions;
-  }
-
-  /**
    * This is a mandatory parameter.
    * Example value: "cobol"
    */