Merge branch 'master' into ccr

* master:
  [TEST] REST client request without leading '/' (#29471)
  Using ObjectParser in UpdateRequest (#29293)
  Prevent accidental changes of default values (#29528)
  [Docs] Add definitions to glossary  (#29127)
  Avoid self-deadlock in the translog (#29520)
  Minor cleanup in NodeInfo.groovy
  Lazy configure build tasks that require older JDKs (#29519)
  Simplify snapshot check in root build file
  Make NodeInfo#nodeVersion strongly-typed as Version (#29515)
  Enable license header exclusions (#29379)
  Use proper Java version for BWC builds (#29493)
  Mute TranslogTests#testFatalIOExceptionsWhileWritingConcurrently
  Enable skipping fetching latest for BWC builds (#29497)

TESTING.asciidoc

@@ -498,6 +498,13 @@ will contain your change.
 . Push both branches to your remote repository.
 . Run the tests with `./gradlew check -Dtests.bwc.remote=${remote} -Dtests.bwc.refspec.5.x=index_req_bwc_5.x`.
 
+== Skip fetching latest
+
+For some BWC testing scenarios, you want to use the local clone of the
+repository without fetching latest. For these use cases, you can set the system
+property `tests.bwc.git_fetch_latest` to `false` and the BWC builds will skip
+fetching the latest from the remote.
+
 == Test coverage analysis
 
 Generating test coverage reports for Elasticsearch is currently not possible through Gradle.

build.gradle

@@ -36,7 +36,7 @@ import java.security.MessageDigest
 // common maven publishing configuration
 subprojects {
   group = 'org.elasticsearch'
-  version = VersionProperties.elasticsearch
+  version = VersionProperties.elasticsearch.toString()
   description = "Elasticsearch subproject ${project.path}"
 }
 
@@ -80,7 +80,7 @@ configure(subprojects.findAll { it.projectDir.toPath().startsWith(rootPath) }) {
  * in a branch if there are only betas and rcs in the branch so we have
  * *something* to test against. */
 VersionCollection versions = new VersionCollection(file('server/src/main/java/org/elasticsearch/Version.java').readLines('UTF-8'))
-if (versions.currentVersion.toString() != VersionProperties.elasticsearch) {
+if (versions.currentVersion != VersionProperties.elasticsearch) {
   throw new GradleException("The last version in Versions.java [${versions.currentVersion}] does not match " +
           "VersionProperties.elasticsearch [${VersionProperties.elasticsearch}]")
 }
@@ -245,7 +245,7 @@ subprojects {
     // other packages (e.g org.elasticsearch.client) will point to server rather than
     // their own artifacts.
     if (project.plugins.hasPlugin(BuildPlugin)) {
-      String artifactsHost = VersionProperties.elasticsearch.endsWith("-SNAPSHOT") ? "https://snapshots.elastic.co" : "https://artifacts.elastic.co"
+      String artifactsHost = VersionProperties.elasticsearch.isSnapshot() ? "https://snapshots.elastic.co" : "https://artifacts.elastic.co"
       Closure sortClosure = { a, b -> b.group <=> a.group }
       Closure depJavadocClosure = { dep ->
         if (dep.group != null && dep.group.startsWith('org.elasticsearch')) {

buildSrc/src/main/groovy/org/elasticsearch/gradle/BuildPlugin.groovy

@@ -97,6 +97,12 @@ class BuildPlugin implements Plugin<Project> {
             String compilerJavaHome = findCompilerJavaHome()
             String runtimeJavaHome = findRuntimeJavaHome(compilerJavaHome)
             File gradleJavaHome = Jvm.current().javaHome
+
+            final Map<Integer, String> javaVersions = [:]
+            for (int version = 7; version <= Integer.parseInt(minimumCompilerVersion.majorVersion); version++) {
+                javaVersions.put(version, findJavaHome(version));
+            }
+
             String javaVendor = System.getProperty('java.vendor')
             String javaVersion = System.getProperty('java.version')
             String gradleJavaVersionDetails = "${javaVendor} ${javaVersion}" +
@@ -158,10 +164,32 @@ class BuildPlugin implements Plugin<Project> {
                 throw new GradleException(message)
             }
 
+            for (final Map.Entry<Integer, String> javaVersionEntry : javaVersions.entrySet()) {
+                final String javaHome = javaVersionEntry.getValue()
+                if (javaHome == null) {
+                    continue
+                }
+                JavaVersion javaVersionEnum = JavaVersion.toVersion(findJavaSpecificationVersion(project, javaHome))
+                final JavaVersion expectedJavaVersionEnum
+                final int version = javaVersionEntry.getKey()
+                if (version < 9) {
+                    expectedJavaVersionEnum = JavaVersion.toVersion("1." + version)
+                } else {
+                    expectedJavaVersionEnum = JavaVersion.toVersion(Integer.toString(version))
+                }
+                if (javaVersionEnum != expectedJavaVersionEnum) {
+                    final String message =
+                            "the environment variable JAVA" + version + "_HOME must be set to a JDK installation directory for Java" +
+                                    " ${expectedJavaVersionEnum} but is [${javaHome}] corresponding to [${javaVersionEnum}]"
+                    throw new GradleException(message)
+                }
+            }
+
             project.rootProject.ext.compilerJavaHome = compilerJavaHome
             project.rootProject.ext.runtimeJavaHome = runtimeJavaHome
             project.rootProject.ext.compilerJavaVersion = compilerJavaVersionEnum
             project.rootProject.ext.runtimeJavaVersion = runtimeJavaVersionEnum
+            project.rootProject.ext.javaVersions = javaVersions
             project.rootProject.ext.buildChecksDone = true
         }
 
@@ -173,6 +201,7 @@ class BuildPlugin implements Plugin<Project> {
         project.ext.runtimeJavaHome = project.rootProject.ext.runtimeJavaHome
         project.ext.compilerJavaVersion = project.rootProject.ext.compilerJavaVersion
         project.ext.runtimeJavaVersion = project.rootProject.ext.runtimeJavaVersion
+        project.ext.javaVersions = project.rootProject.ext.javaVersions
     }
 
     private static String findCompilerJavaHome() {
@@ -188,6 +217,27 @@ class BuildPlugin implements Plugin<Project> {
         return javaHome
     }
 
+    private static String findJavaHome(int version) {
+        return System.getenv('JAVA' + version + '_HOME')
+    }
+
+    /**
+     * Get Java home for the project for the specified version. If the specified version is not configured, an exception with the specified
+     * message is thrown.
+     *
+     * @param project the project
+     * @param version the version of Java home to obtain
+     * @param message the exception message if Java home for the specified version is not configured
+     * @return Java home for the specified version
+     * @throws GradleException if Java home for the specified version is not configured
+     */
+    static String getJavaHome(final Project project, final int version, final String message) {
+        if (project.javaVersions.get(version) == null) {
+            throw new GradleException(message)
+        }
+        return project.javaVersions.get(version)
+    }
+
     private static String findRuntimeJavaHome(final String compilerJavaHome) {
         assert compilerJavaHome != null
         return System.getenv('RUNTIME_JAVA_HOME') ?: compilerJavaHome
@@ -517,17 +567,18 @@ class BuildPlugin implements Plugin<Project> {
             jarTask.destinationDir = new File(project.buildDir, 'distributions')
             // fixup the jar manifest
             jarTask.doFirst {
-                boolean isSnapshot = VersionProperties.elasticsearch.endsWith("-SNAPSHOT");
+                final Version versionWithoutSnapshot = new Version(
-                String version = VersionProperties.elasticsearch;
+                        VersionProperties.elasticsearch.major,
-                if (isSnapshot) {
+                        VersionProperties.elasticsearch.minor,
-                    version = version.substring(0, version.length() - 9)
+                        VersionProperties.elasticsearch.revision,
-                }
+                        VersionProperties.elasticsearch.suffix,
+                        false)
                 // this doFirst is added before the info plugin, therefore it will run
                 // after the doFirst added by the info plugin, and we can override attributes
                 jarTask.manifest.attributes(
-                        'X-Compile-Elasticsearch-Version': version,
+                        'X-Compile-Elasticsearch-Version': versionWithoutSnapshot,
                         'X-Compile-Lucene-Version': VersionProperties.lucene,
-                        'X-Compile-Elasticsearch-Snapshot': isSnapshot,
+                        'X-Compile-Elasticsearch-Snapshot': VersionProperties.elasticsearch.isSnapshot(),
                         'Build-Date': ZonedDateTime.now(ZoneOffset.UTC),
                         'Build-Java-Version': project.compilerJavaVersion)
                 if (jarTask.manifest.attributes.containsKey('Change') == false) {

buildSrc/src/main/groovy/org/elasticsearch/gradle/Version.groovy

@@ -74,20 +74,36 @@ public class Version {
         return "${major}.${minor}.${revision}${suffix}${snapshotStr}"
     }
 
+    public boolean before(Version compareTo) {
+        return id < compareTo.id
+    }
+
     public boolean before(String compareTo) {
-        return id < fromString(compareTo).id
+        return before(fromString(compareTo))
+    }
+
+    public boolean onOrBefore(Version compareTo) {
+        return id <= compareTo.id
     }
 
     public boolean onOrBefore(String compareTo) {
-        return id <= fromString(compareTo).id
+        return onOrBefore(fromString(compareTo))
+    }
+
+    public boolean onOrAfter(Version compareTo) {
+        return id >= compareTo.id
     }
 
     public boolean onOrAfter(String compareTo) {
-        return id >= fromString(compareTo).id
+        return onOrAfter(fromString(compareTo))
+    }
+
+    public boolean after(Version compareTo) {
+        return id > compareTo.id
     }
 
     public boolean after(String compareTo) {
-        return id > fromString(compareTo).id
+        return after(fromString(compareTo))
     }
 
     public boolean onOrBeforeIncludingSuffix(Version otherVersion) {

buildSrc/src/main/groovy/org/elasticsearch/gradle/VersionProperties.groovy

@@ -22,7 +22,7 @@ package org.elasticsearch.gradle
  * Accessor for shared dependency versions used by elasticsearch, namely the elasticsearch and lucene versions.
  */
 class VersionProperties {
-    static final String elasticsearch
+    static final Version elasticsearch
     static final String lucene
     static final Map<String, String> versions = new HashMap<>()
     static {
@@ -32,7 +32,7 @@ class VersionProperties {
             throw new RuntimeException('/version.properties resource missing')
         }
         props.load(propsStream)
-        elasticsearch = props.getProperty('elasticsearch')
+        elasticsearch = Version.fromString(props.getProperty('elasticsearch'))
         lucene = props.getProperty('lucene')
         for (String property : props.stringPropertyNames()) {
             versions.put(property, props.getProperty(property))

buildSrc/src/main/groovy/org/elasticsearch/gradle/doc/DocsTestPlugin.groovy

@@ -41,7 +41,7 @@ public class DocsTestPlugin extends RestTestPlugin {
              * to the version being built for testing but needs to resolve to
              * the last released version for docs. */
             '\\{version\\}':
-                VersionProperties.elasticsearch.replace('-SNAPSHOT', ''),
+                VersionProperties.elasticsearch.toString().replace('-SNAPSHOT', ''),
             '\\{lucene_version\\}' : VersionProperties.lucene.replaceAll('-snapshot-\\w+$', ''),
         ]
         Task listSnippets = project.tasks.create('listSnippets', SnippetsTask)

buildSrc/src/main/groovy/org/elasticsearch/gradle/plugin/PluginPropertiesTask.groovy

@@ -77,7 +77,7 @@ class PluginPropertiesTask extends Copy {
             'name': extension.name,
             'description': extension.description,
             'version': stringSnap(extension.version),
-            'elasticsearchVersion': stringSnap(VersionProperties.elasticsearch),
+            'elasticsearchVersion': stringSnap(VersionProperties.elasticsearch.toString()),
             'javaVersion': project.targetCompatibility as String,
             'classname': extension.classname,
             'extendedPlugins': extension.extendedPlugins.join(','),

buildSrc/src/main/groovy/org/elasticsearch/gradle/precommit/LicenseHeadersTask.groovy

@@ -49,6 +49,14 @@ public class LicenseHeadersTask extends AntTask {
     @Input
     List<String> approvedLicenses = ['Apache', 'Generated']
 
+    /**
+     * Files that should be excluded from the license header check. Use with extreme care, only in situations where the license on the
+     * source file is compatible with the codebase but we do not want to add the license to the list of approved headers (to avoid the
+     * possibility of inadvertently using the license on our own source files).
+     */
+    @Input
+    List<String> excludes = []
+
     /**
      * Additional license families that may be found. The key is the license category name (5 characters),
      * followed by the family name and the value list of patterns to search for.
@@ -95,7 +103,7 @@ public class LicenseHeadersTask extends AntTask {
                for (File dir: dirSet.srcDirs) {
                    // sometimes these dirs don't exist, e.g. site-plugin has no actual java src/main...
                    if (dir.exists()) {
-                       ant.fileset(dir: dir)
+                       ant.fileset(dir: dir, excludes: excludes.join(' '))
                    }
                }
             }

buildSrc/src/main/groovy/org/elasticsearch/gradle/test/ClusterConfiguration.groovy

@@ -18,6 +18,7 @@
  */
 package org.elasticsearch.gradle.test
 
+import org.elasticsearch.gradle.Version
 import org.gradle.api.GradleException
 import org.gradle.api.Project
 import org.gradle.api.tasks.Input
@@ -37,7 +38,7 @@ class ClusterConfiguration {
     int numBwcNodes = 0
 
     @Input
-    String bwcVersion = null
+    Version bwcVersion = null
 
     @Input
     int httpPort = 0

buildSrc/src/main/groovy/org/elasticsearch/gradle/test/ClusterFormationTasks.groovy

@@ -107,11 +107,14 @@ class ClusterFormationTasks {
         for (int i = 0; i < config.numNodes; i++) {
             // we start N nodes and out of these N nodes there might be M bwc nodes.
             // for each of those nodes we might have a different configuration
-            String elasticsearchVersion = VersionProperties.elasticsearch
+            final Configuration distro
-            Configuration distro = currentDistro
+            final Version elasticsearchVersion
             if (i < config.numBwcNodes) {
                 elasticsearchVersion = config.bwcVersion
                 distro = bwcDistro
+            } else {
+                elasticsearchVersion = VersionProperties.elasticsearch
+                distro = currentDistro
             }
             NodeInfo node = new NodeInfo(config, i, project, prefix, elasticsearchVersion, sharedDir)
             nodes.add(node)
@@ -126,7 +129,7 @@ class ClusterFormationTasks {
     }
 
     /** Adds a dependency on the given distribution */
-    static void configureDistributionDependency(Project project, String distro, Configuration configuration, String elasticsearchVersion) {
+    static void configureDistributionDependency(Project project, String distro, Configuration configuration, Version elasticsearchVersion) {
         String packaging = distro
         if (distro == 'tar') {
             packaging = 'tar.gz'
@@ -137,7 +140,7 @@ class ClusterFormationTasks {
     }
 
     /** Adds a dependency on a different version of the given plugin, which will be retrieved using gradle's dependency resolution */
-    static void configureBwcPluginDependency(String name, Project project, Project pluginProject, Configuration configuration, String elasticsearchVersion) {
+    static void configureBwcPluginDependency(String name, Project project, Project pluginProject, Configuration configuration, Version elasticsearchVersion) {
         verifyProjectHasBuildPlugin(name, elasticsearchVersion, project, pluginProject)
         final String pluginName = findPluginName(pluginProject)
         project.dependencies.add(configuration.name, "org.elasticsearch.plugin:${pluginName}:${elasticsearchVersion}@zip")
@@ -303,7 +306,7 @@ class ClusterFormationTasks {
         // Default the watermarks to absurdly low to prevent the tests from failing on nodes without enough disk space
         esConfig['cluster.routing.allocation.disk.watermark.low'] = '1b'
         esConfig['cluster.routing.allocation.disk.watermark.high'] = '1b'
-        if (Version.fromString(node.nodeVersion).major >= 6) {
+        if (node.nodeVersion.major >= 6) {
             esConfig['cluster.routing.allocation.disk.watermark.flood_stage'] = '1b'
         }
         // increase script compilation limit since tests can rapid-fire script compilations
@@ -803,7 +806,7 @@ class ClusterFormationTasks {
         return retVal
     }
 
-    static void verifyProjectHasBuildPlugin(String name, String version, Project project, Project pluginProject) {
+    static void verifyProjectHasBuildPlugin(String name, Version version, Project project, Project pluginProject) {
         if (pluginProject.plugins.hasPlugin(PluginBuildPlugin) == false && pluginProject.plugins.hasPlugin(MetaPluginBuildPlugin) == false) {
             throw new GradleException("Task [${name}] cannot add plugin [${pluginProject.path}] with version [${version}] to project's " +
                     "[${project.path}] dependencies: the plugin is not an esplugin or es_meta_plugin")

buildSrc/src/main/groovy/org/elasticsearch/gradle/test/NodeInfo.groovy

@@ -16,6 +16,7 @@
  * specific language governing permissions and limitations
  * under the License.
  */
+
 package org.elasticsearch.gradle.test
 
 import com.sun.jna.Native
@@ -29,6 +30,8 @@ import java.nio.file.Files
 import java.nio.file.Path
 import java.nio.file.Paths
 
+import static org.elasticsearch.gradle.BuildPlugin.getJavaHome
+
 /**
  * A container for the files and configuration associated with a single node in a test cluster.
  */
@@ -100,10 +103,10 @@ class NodeInfo {
     ByteArrayOutputStream buffer = new ByteArrayOutputStream()
 
     /** the version of elasticsearch that this node runs */
-    String nodeVersion
+    Version nodeVersion
 
     /** Holds node configuration for part of a test cluster. */
-    NodeInfo(ClusterConfiguration config, int nodeNum, Project project, String prefix, String nodeVersion, File sharedDir) {
+    NodeInfo(ClusterConfiguration config, int nodeNum, Project project, String prefix, Version nodeVersion, File sharedDir) {
         this.config = config
         this.nodeNum = nodeNum
         this.sharedDir = sharedDir
@@ -162,7 +165,14 @@ class NodeInfo {
             args.add("${esScript}")
         }
 
-        env = ['JAVA_HOME': project.runtimeJavaHome]
+        if (nodeVersion.before("6.2.0")) {
+            env = ['JAVA_HOME': "${-> getJavaHome(project, 8, "JAVA8_HOME must be set to run BWC tests against [" + nodeVersion + "]")}"]
+        } else if (nodeVersion.onOrAfter("6.2.0") && nodeVersion.before("6.3.0")) {
+            env = ['JAVA_HOME': "${-> getJavaHome(project, 9, "JAVA9_HOME must be set to run BWC tests against [" + nodeVersion + "]")}"]
+        } else {
+            env = ['JAVA_HOME': (String) project.runtimeJavaHome]
+        }
+
         args.addAll("-E", "node.portsfile=true")
         String collectedSystemProperties = config.systemProperties.collect { key, value -> "-D${key}=${value}" }.join(" ")
         String esJavaOpts = config.jvmArgs.isEmpty() ? collectedSystemProperties : collectedSystemProperties + " " + config.jvmArgs
@@ -284,7 +294,7 @@ class NodeInfo {
     }
 
     /** Returns the directory elasticsearch home is contained in for the given distribution */
-    static File homeDir(File baseDir, String distro, String nodeVersion) {
+    static File homeDir(File baseDir, String distro, Version nodeVersion) {
         String path
         switch (distro) {
             case 'integ-test-zip':
@@ -302,7 +312,7 @@ class NodeInfo {
         return new File(baseDir, path)
     }
 
-    static File pathConf(File baseDir, String distro, String nodeVersion) {
+    static File pathConf(File baseDir, String distro, Version nodeVersion) {
         switch (distro) {
             case 'integ-test-zip':
             case 'zip':

client/client-benchmark-noop-api-plugin/src/main/java/org/elasticsearch/plugin/noop/action/bulk/RestNoopBulkAction.java

@@ -27,7 +27,6 @@ import org.elasticsearch.action.support.ActiveShardCount;
 import org.elasticsearch.action.update.UpdateResponse;
 import org.elasticsearch.client.Requests;
 import org.elasticsearch.client.node.NodeClient;
-import org.elasticsearch.common.Strings;
 import org.elasticsearch.common.settings.Settings;
 import org.elasticsearch.common.xcontent.XContentBuilder;
 import org.elasticsearch.index.shard.ShardId;
@@ -68,9 +67,7 @@ public class RestNoopBulkAction extends BaseRestHandler {
         String defaultIndex = request.param("index");
         String defaultType = request.param("type");
         String defaultRouting = request.param("routing");
-        String fieldsParam = request.param("fields");
         String defaultPipeline = request.param("pipeline");
-        String[] defaultFields = fieldsParam != null ? Strings.commaDelimitedListToStringArray(fieldsParam) : null;
 
         String waitForActiveShards = request.param("wait_for_active_shards");
         if (waitForActiveShards != null) {
@@ -78,7 +75,7 @@ public class RestNoopBulkAction extends BaseRestHandler {
         }
         bulkRequest.timeout(request.paramAsTime("timeout", BulkShardRequest.DEFAULT_TIMEOUT));
         bulkRequest.setRefreshPolicy(request.param("refresh"));
-        bulkRequest.add(request.requiredContent(), defaultIndex, defaultType, defaultRouting, defaultFields,
+        bulkRequest.add(request.requiredContent(), defaultIndex, defaultType, defaultRouting,
             null, defaultPipeline, null, true, request.getXContentType());
 
         // short circuit the call to the transport layer

client/rest/src/test/java/org/elasticsearch/client/RestClientSingleHostIntegTests.java

@@ -58,6 +58,7 @@ import static org.hamcrest.Matchers.startsWith;
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertThat;
 import static org.junit.Assert.assertTrue;
+import static org.junit.Assert.fail;
 
 /**
  * Integration test to check interaction between {@link RestClient} and {@link org.apache.http.client.HttpClient}.
@@ -135,8 +136,7 @@ public class RestClientSingleHostIntegTests extends RestClientTestCase {
         final RestClientBuilder restClientBuilder = RestClient.builder(
             new HttpHost(httpServer.getAddress().getHostString(), httpServer.getAddress().getPort())).setDefaultHeaders(defaultHeaders);
         if (pathPrefix.length() > 0) {
-            // sometimes cut off the leading slash
+            restClientBuilder.setPathPrefix(pathPrefix);
-            restClientBuilder.setPathPrefix(randomBoolean() ? pathPrefix.substring(1) : pathPrefix);
         }
 
         if (useAuth) {
@@ -281,6 +281,33 @@ public class RestClientSingleHostIntegTests extends RestClientTestCase {
         }
     }
 
+    public void testUrlWithoutLeadingSlash() throws Exception {
+        if (pathPrefix.length() == 0) {
+            try {
+                restClient.performRequest("GET", "200");
+                fail("request should have failed");
+            } catch(ResponseException e) {
+                assertEquals(404, e.getResponse().getStatusLine().getStatusCode());
+            }
+        } else {
+            {
+                Response response = restClient.performRequest("GET", "200");
+                //a trailing slash gets automatically added if a pathPrefix is configured
+                assertEquals(200, response.getStatusLine().getStatusCode());
+            }
+            {
+                //pathPrefix is not required to start with '/', will be added automatically
+                try (RestClient restClient = RestClient.builder(
+                        new HttpHost(httpServer.getAddress().getHostString(), httpServer.getAddress().getPort()))
+                        .setPathPrefix(pathPrefix.substring(1)).build()) {
+                    Response response = restClient.performRequest("GET", "200");
+                    //a trailing slash gets automatically added if a pathPrefix is configured
+                    assertEquals(200, response.getStatusLine().getStatusCode());
+                }
+            }
+        }
+    }
+
     private Response bodyTest(final String method) throws IOException {
         return bodyTest(restClient, method);
     }

distribution/bwc/build.gradle

@@ -17,11 +17,12 @@
  * under the License.
  */
 
+
 import org.apache.tools.ant.taskdefs.condition.Os
 import org.elasticsearch.gradle.LoggedExec
 import org.elasticsearch.gradle.Version
 
-import java.util.regex.Matcher
+import static org.elasticsearch.gradle.BuildPlugin.getJavaHome
 
 /**
  * This is a dummy project which does a local checkout of the previous
@@ -54,6 +55,16 @@ subprojects {
 
   final String remote = System.getProperty("tests.bwc.remote", "elastic")
 
+  final boolean gitFetchLatest
+  final String gitFetchLatestProperty = System.getProperty("tests.bwc.git_fetch_latest", "true")
+  if ("true".equals(gitFetchLatestProperty)) {
+    gitFetchLatest = true
+  } else if ("false".equals(gitFetchLatestProperty)) {
+    gitFetchLatest = false
+  } else {
+    throw new GradleException("tests.bwc.git_fetch_latest must be [true] or [false] but was [" + gitFetchLatestProperty + "]")
+  }
+
   task createClone(type: LoggedExec) {
     onlyIf { checkoutDir.exists() == false }
     commandLine = ['git', 'clone', rootDir, checkoutDir]
@@ -83,7 +94,7 @@ subprojects {
   }
 
   task fetchLatest(type: LoggedExec) {
-    onlyIf { project.gradle.startParameter.isOffline() == false }
+    onlyIf { project.gradle.startParameter.isOffline() == false && gitFetchLatest }
     dependsOn addRemote
     workingDir = checkoutDir
     commandLine = ['git', 'fetch', '--all']
@@ -134,12 +145,13 @@ subprojects {
   task buildBwcVersion(type: Exec) {
     dependsOn checkoutBwcBranch, writeBuildMetadata
     workingDir = checkoutDir
-    if (project.rootProject.ext.runtimeJavaVersion == JavaVersion.VERSION_1_8 && ["5.6", "6.0", "6.1"].contains(bwcBranch)) {
+    if (["5.6", "6.0", "6.1"].contains(bwcBranch)) {
-      /*
+      // we are building branches that are officially built with JDK 8, push JAVA8_HOME to JAVA_HOME for these builds
-       * If runtime Java home is set to JDK 8 and we are building branches that are officially built with JDK 8, push this to JAVA_HOME for
+      environment('JAVA_HOME', "${-> getJavaHome(project, 8, "JAVA8_HOME is required to build BWC versions for BWC branch [" + bwcBranch + "]")}")
-       * these builds.
+    } else if ("6.2".equals(bwcBranch)) {
-       */
+      environment('JAVA_HOME', "${-> getJavaHome(project, 9, "JAVA9_HOME is required to build BWC versions for BWC branch [" + bwcBranch + "]")}")
-      environment('JAVA_HOME', System.getenv('RUNTIME_JAVA_HOME'))
+    } else {
+      environment('JAVA_HOME', project.compilerJavaHome)
     }
     if (Os.isFamily(Os.FAMILY_WINDOWS)) {
       executable 'cmd'

docs/reference/glossary.asciidoc

@@ -61,6 +61,15 @@
   `object`. The mapping also allows you to define (amongst other things)
   how the value for a field should be analyzed.
 
+[[glossary-filter]] filter ::
+
+  A filter is a non-scoring <<glossary-query,query>>, meaning that it does not score documents.
+  It is only concerned about answering the question - "Does this document match?". 
+  The answer is always a simple, binary yes or no. This kind of query is said to be made 
+  in a <<query-filter-context,filter context>>, 
+  hence it is called a filter. Filters are simple checks for set inclusion or exclusion. 
+  In most cases, the goal of filtering is to reduce the number of documents that have to be examined.
+
 [[glossary-index]] index ::
 
   An index is like a _table_ in a relational database. It has a
@@ -105,6 +114,16 @@
   +
   See also <<glossary-routing,routing>>
 
+[[glossary-query]] query ::
+
+  A query is the basic component of a search. A search can be defined by one or more queries 
+  which can be mixed and matched in endless combinations. While <<glossary-filter,filters>> are
+  queries that only determine if a document matches, those queries that also calculate how well
+  the document matches are known as "scoring queries". Those queries assign it a score, which is 
+  later used to sort matched documents. Scoring queries take more resources than <<glossary-filter,non scoring queries>> 
+  and their query results are not cacheable. As a general rule, use query clauses for full-text 
+  search or for any condition that requires scoring, and use filters for everything else.
+
  [[glossary-replica-shard]] replica shard ::
 
   Each <<glossary-primary-shard,primary shard>> can have zero or more
@@ -161,8 +180,9 @@
 
   A term is an exact value that is indexed in Elasticsearch. The terms
   `foo`, `Foo`, `FOO` are NOT equivalent. Terms (i.e. exact values) can
-  be searched for using _term_ queries. +
+  be searched for using _term_ queries.
-   See also <<glossary-text,text>> and <<glossary-analysis,analysis>>.
+  +
+  See also <<glossary-text,text>> and <<glossary-analysis,analysis>>.
 
 [[glossary-text]] text ::
 

docs/reference/migration/migrate_7_0/api.asciidoc

@@ -2,7 +2,7 @@
 === Breaking API changes in 7.0
 
 ==== Camel case and underscore parameters deprecated in 6.x have been removed
-A  number of duplicate parameters deprecated in 6.x have been removed from
+A number of duplicate parameters deprecated in 6.x have been removed from
 Bulk request, Multi Get request, Term Vectors request, and More Like This Query
 requests.
 
@@ -22,3 +22,7 @@ The following parameters starting with underscore have been removed:
 Instead of these removed parameters, use their non camel case equivalents without
 starting underscore, e.g. use `version_type` instead of `_version_type` or `versionType`.
 
+
+==== The parameter `fields` deprecated in 6.x has been removed from Bulk request 
+and Update request. The Update API returns `400 - Bad request` if request contains 
+unknown parameters (instead of ignored in the previous version).

qa/reindex-from-old/build.gradle

@@ -24,8 +24,11 @@ should be able to use the standard launching mechanism which
 is more flexible and reliable.
 """
 
+
 import org.apache.tools.ant.taskdefs.condition.Os
 
+import static org.elasticsearch.gradle.BuildPlugin.getJavaHome
+
 apply plugin: 'elasticsearch.standalone-rest-test'
 apply plugin: 'elasticsearch.rest-test'
 
@@ -51,9 +54,8 @@ dependencies {
   es090 'org.elasticsearch:elasticsearch:0.90.13@zip'
 }
 
-if (project.runtimeJavaVersion >= JavaVersion.VERSION_1_9 || Os.isFamily(Os.FAMILY_WINDOWS)) {
+if (Os.isFamily(Os.FAMILY_WINDOWS)) {
-  /* We can't run the dependencies with Java 9 so for now we'll skip the whole
+  // we can't get the pid files in windows so we skip that
-   * thing. We can't get the pid files in windows so we skip that as well.... */
   integTest.enabled = false
 } else {
   /* Set up tasks to unzip and run the old versions of ES before running the
@@ -75,7 +77,7 @@ if (project.runtimeJavaVersion >= JavaVersion.VERSION_1_9 || Os.isFamily(Os.FAMI
       dependsOn unzip
       executable = new File(project.runtimeJavaHome, 'bin/java')
       env 'CLASSPATH', "${ -> project.configurations.oldesFixture.asPath }"
-      env 'JAVA_HOME', project.runtimeJavaHome
+      env 'JAVA_HOME', "${-> getJavaHome(project, 7, "JAVA7_HOME must be set to run reindex-from-old")}"
       args 'oldes.OldElasticsearch',
            baseDir,
            unzip.temporaryDir,

rest-api-spec/src/main/resources/rest-api-spec/api/bulk.json

@@ -37,10 +37,6 @@
           "type" : "string",
           "description" : "Default document type for items which don't provide one"
         },
-        "fields": {
-          "type": "list",
-          "description" : "Default comma-separated list of fields to return in the response for updates, can be overridden on each sub-request"
-        },
         "_source": {
           "type" : "list",
           "description" : "True or false to return the _source field or not, or default list of fields to return, can be overridden on each sub-request"

rest-api-spec/src/main/resources/rest-api-spec/api/update.json

@@ -27,10 +27,6 @@
           "type": "string",
           "description": "Sets the number of shard copies that must be active before proceeding with the update operation. Defaults to 1, meaning the primary shard only. Set to `all` for all shard copies, otherwise set to any non-negative value less than or equal to the total number of copies for the shard (number of replicas + 1)"
         },
-        "fields": {
-          "type": "list",
-          "description": "A comma-separated list of fields to return in the response"
-        },
         "_source": {
           "type" : "list",
           "description" : "True or false to return the _source field or not, or a list of fields to return"

server/src/main/java/org/elasticsearch/action/bulk/BulkProcessor.java

@@ -299,7 +299,7 @@ public class BulkProcessor implements Closeable {
      */
     public synchronized BulkProcessor add(BytesReference data, @Nullable String defaultIndex, @Nullable String defaultType,
                                           @Nullable String defaultPipeline, @Nullable Object payload, XContentType xContentType) throws Exception {
-        bulkRequest.add(data, defaultIndex, defaultType, null, null, null, defaultPipeline, payload, true, xContentType);
+        bulkRequest.add(data, defaultIndex, defaultType, null, null, defaultPipeline, payload, true, xContentType);
         executeIfNeeded();
         return this;
     }

server/src/main/java/org/elasticsearch/action/bulk/BulkRequest.java

@@ -36,8 +36,6 @@ import org.elasticsearch.common.bytes.BytesArray;
 import org.elasticsearch.common.bytes.BytesReference;
 import org.elasticsearch.common.io.stream.StreamInput;
 import org.elasticsearch.common.io.stream.StreamOutput;
-import org.elasticsearch.common.logging.DeprecationLogger;
-import org.elasticsearch.common.logging.Loggers;
 import org.elasticsearch.common.lucene.uid.Versions;
 import org.elasticsearch.common.unit.TimeValue;
 import org.elasticsearch.common.xcontent.LoggingDeprecationHandler;
@@ -66,8 +64,6 @@ import static org.elasticsearch.action.ValidateActions.addValidationError;
  * @see org.elasticsearch.client.Client#bulk(BulkRequest)
  */
 public class BulkRequest extends ActionRequest implements CompositeIndicesRequest, WriteRequest<BulkRequest> {
-    private static final DeprecationLogger DEPRECATION_LOGGER =
-        new DeprecationLogger(Loggers.getLogger(BulkRequest.class));
 
     private static final int REQUEST_OVERHEAD = 50;
 
@@ -80,7 +76,6 @@ public class BulkRequest extends ActionRequest implements CompositeIndicesReques
     private static final ParseField VERSION_TYPE = new ParseField("version_type");
     private static final ParseField RETRY_ON_CONFLICT = new ParseField("retry_on_conflict");
     private static final ParseField PIPELINE = new ParseField("pipeline");
-    private static final ParseField FIELDS = new ParseField("fields");
     private static final ParseField SOURCE = new ParseField("_source");
 
     /**
@@ -277,7 +272,7 @@ public class BulkRequest extends ActionRequest implements CompositeIndicesReques
      */
     public BulkRequest add(BytesReference data, @Nullable String defaultIndex, @Nullable String defaultType,
                            XContentType xContentType) throws IOException {
-        return add(data, defaultIndex, defaultType, null, null, null, null, null, true, xContentType);
+        return add(data, defaultIndex, defaultType, null, null, null, null, true, xContentType);
     }
 
     /**
@@ -285,12 +280,13 @@ public class BulkRequest extends ActionRequest implements CompositeIndicesReques
      */
     public BulkRequest add(BytesReference data, @Nullable String defaultIndex, @Nullable String defaultType, boolean allowExplicitIndex,
                            XContentType xContentType) throws IOException {
-        return add(data, defaultIndex, defaultType, null, null, null, null, null, allowExplicitIndex, xContentType);
+        return add(data, defaultIndex, defaultType, null, null, null, null, allowExplicitIndex, xContentType);
     }
 
-    public BulkRequest add(BytesReference data, @Nullable String defaultIndex, @Nullable String defaultType, @Nullable String
+    public BulkRequest add(BytesReference data, @Nullable String defaultIndex, @Nullable String defaultType,
-        defaultRouting, @Nullable String[] defaultFields, @Nullable FetchSourceContext defaultFetchSourceContext, @Nullable String
+                           @Nullable String defaultRouting, @Nullable FetchSourceContext defaultFetchSourceContext,
-        defaultPipeline, @Nullable Object payload, boolean allowExplicitIndex, XContentType xContentType) throws IOException {
+                           @Nullable String defaultPipeline, @Nullable Object payload, boolean allowExplicitIndex,
+                           XContentType xContentType) throws IOException {
         XContent xContent = xContentType.xContent();
         int line = 0;
         int from = 0;
@@ -333,7 +329,6 @@ public class BulkRequest extends ActionRequest implements CompositeIndicesReques
                 String id = null;
                 String routing = defaultRouting;
                 FetchSourceContext fetchSourceContext = defaultFetchSourceContext;
-                String[] fields = defaultFields;
                 String opType = null;
                 long version = Versions.MATCH_ANY;
                 VersionType versionType = VersionType.INTERNAL;
@@ -371,21 +366,14 @@ public class BulkRequest extends ActionRequest implements CompositeIndicesReques
                                 retryOnConflict = parser.intValue();
                             } else if (PIPELINE.match(currentFieldName, parser.getDeprecationHandler())) {
                                 pipeline = parser.text();
-                            } else if (FIELDS.match(currentFieldName, parser.getDeprecationHandler())) {
-                                throw new IllegalArgumentException("Action/metadata line [" + line + "] contains a simple value for parameter [fields] while a list is expected");
                             } else if (SOURCE.match(currentFieldName, parser.getDeprecationHandler())) {
                                 fetchSourceContext = FetchSourceContext.fromXContent(parser);
                             } else {
                                 throw new IllegalArgumentException("Action/metadata line [" + line + "] contains an unknown parameter [" + currentFieldName + "]");
                             }
                         } else if (token == XContentParser.Token.START_ARRAY) {
-                            if (FIELDS.match(currentFieldName, parser.getDeprecationHandler())) {
+                            throw new IllegalArgumentException("Malformed action/metadata line [" + line +
-                                DEPRECATION_LOGGER.deprecated("Deprecated field [fields] used, expected [_source] instead");
+                                "], expected a simple value for field [" + currentFieldName + "] but found [" + token + "]");
-                                List<Object> values = parser.list();
-                                fields = values.toArray(new String[values.size()]);
-                            } else {
-                                throw new IllegalArgumentException("Malformed action/metadata line [" + line + "], expected a simple value for field [" + currentFieldName + "] but found [" + token + "]");
-                            }
                         } else if (token == XContentParser.Token.START_OBJECT && SOURCE.match(currentFieldName, parser.getDeprecationHandler())) {
                             fetchSourceContext = FetchSourceContext.fromXContent(parser);
                         } else if (token != XContentParser.Token.VALUE_NULL) {
@@ -435,10 +423,6 @@ public class BulkRequest extends ActionRequest implements CompositeIndicesReques
                         if (fetchSourceContext != null) {
                             updateRequest.fetchSource(fetchSourceContext);
                         }
-                        if (fields != null) {
-                            updateRequest.fields(fields);
-                        }
-
                         IndexRequest upsertRequest = updateRequest.upsertRequest();
                         if (upsertRequest != null) {
                             upsertRequest.version(version);

server/src/main/java/org/elasticsearch/action/bulk/TransportShardBulkAction.java

@@ -291,8 +291,7 @@ public class TransportShardBulkAction extends TransportWriteAction<BulkShardRequ
                     indexResponse.getId(), indexResponse.getSeqNo(), indexResponse.getPrimaryTerm(), indexResponse.getVersion(),
                     indexResponse.getResult());
 
-            if ((updateRequest.fetchSource() != null && updateRequest.fetchSource().fetchSource()) ||
+            if (updateRequest.fetchSource() != null && updateRequest.fetchSource().fetchSource()) {
-                    (updateRequest.fields() != null && updateRequest.fields().length > 0)) {
                 final BytesReference indexSourceAsBytes = updateIndexRequest.source();
                 final Tuple<XContentType, Map<String, Object>> sourceAndContent =
                         XContentHelper.convertToMap(indexSourceAsBytes, true, updateIndexRequest.getContentType());

server/src/main/java/org/elasticsearch/action/update/TransportUpdateAction.java

@@ -180,8 +180,7 @@ public class TransportUpdateAction extends TransportInstanceSingleOperationActio
                 bulkAction.execute(toSingleItemBulkRequest(upsertRequest), wrapBulkResponse(
                         ActionListener.<IndexResponse>wrap(response -> {
                             UpdateResponse update = new UpdateResponse(response.getShardInfo(), response.getShardId(), response.getType(), response.getId(), response.getSeqNo(), response.getPrimaryTerm(), response.getVersion(), response.getResult());
-                            if ((request.fetchSource() != null && request.fetchSource().fetchSource()) ||
+                            if (request.fetchSource() != null && request.fetchSource().fetchSource()) {
-                                    (request.fields() != null && request.fields().length > 0)) {
                                 Tuple<XContentType, Map<String, Object>> sourceAndContent =
                                         XContentHelper.convertToMap(upsertSourceBytes, true, upsertRequest.getContentType());
                                 update.setGetResult(UpdateHelper.extractGetResult(request, request.concreteIndex(), response.getVersion(), sourceAndContent.v2(), sourceAndContent.v1(), upsertSourceBytes));

server/src/main/java/org/elasticsearch/action/update/UpdateHelper.java

@@ -29,7 +29,6 @@ import org.elasticsearch.common.Nullable;
 import org.elasticsearch.common.bytes.BytesReference;
 import org.elasticsearch.common.collect.Tuple;
 import org.elasticsearch.common.component.AbstractComponent;
-import org.elasticsearch.common.document.DocumentField;
 import org.elasticsearch.common.io.stream.BytesStreamOutput;
 import org.elasticsearch.common.io.stream.Streamable;
 import org.elasticsearch.common.settings.Settings;
@@ -49,7 +48,7 @@ import org.elasticsearch.script.ScriptService;
 import org.elasticsearch.search.lookup.SourceLookup;
 
 import java.io.IOException;
-import java.util.ArrayList;
+import java.util.Collections;
 import java.util.HashMap;
 import java.util.Map;
 import java.util.function.LongSupplier;
@@ -292,61 +291,33 @@ public class UpdateHelper extends AbstractComponent {
 
     /**
      * Applies {@link UpdateRequest#fetchSource()} to the _source of the updated document to be returned in a update response.
-     * For BWC this function also extracts the {@link UpdateRequest#fields()} from the updated document to be returned in a update response
      */
     public static GetResult extractGetResult(final UpdateRequest request, String concreteIndex, long version,
                                              final Map<String, Object> source, XContentType sourceContentType,
                                              @Nullable final BytesReference sourceAsBytes) {
-        if ((request.fields() == null || request.fields().length == 0) &&
+        if (request.fetchSource() == null || request.fetchSource().fetchSource() == false) {
-            (request.fetchSource() == null || request.fetchSource().fetchSource() == false)) {
             return null;
         }
-        SourceLookup sourceLookup = new SourceLookup();
-        sourceLookup.setSource(source);
-        boolean sourceRequested = false;
-        Map<String, DocumentField> fields = null;
-        if (request.fields() != null && request.fields().length > 0) {
-            for (String field : request.fields()) {
-                if (field.equals("_source")) {
-                    sourceRequested = true;
-                    continue;
-                }
-                Object value = sourceLookup.extractValue(field);
-                if (value != null) {
-                    if (fields == null) {
-                        fields = new HashMap<>(2);
-                    }
-                    DocumentField documentField = fields.get(field);
-                    if (documentField == null) {
-                        documentField = new DocumentField(field, new ArrayList<>(2));
-                        fields.put(field, documentField);
-                    }
-                    documentField.getValues().add(value);
-                }
-            }
-        }
 
         BytesReference sourceFilteredAsBytes = sourceAsBytes;
-        if (request.fetchSource() != null && request.fetchSource().fetchSource()) {
+        if (request.fetchSource().includes().length > 0 || request.fetchSource().excludes().length > 0) {
-            sourceRequested = true;
+            SourceLookup sourceLookup = new SourceLookup();
-            if (request.fetchSource().includes().length > 0 || request.fetchSource().excludes().length > 0) {
+            sourceLookup.setSource(source);
-                Object value = sourceLookup.filter(request.fetchSource());
+            Object value = sourceLookup.filter(request.fetchSource());
-                try {
+            try {
-                    final int initialCapacity = Math.min(1024, sourceAsBytes.length());
+                final int initialCapacity = Math.min(1024, sourceAsBytes.length());
-                    BytesStreamOutput streamOutput = new BytesStreamOutput(initialCapacity);
+                BytesStreamOutput streamOutput = new BytesStreamOutput(initialCapacity);
-                    try (XContentBuilder builder = new XContentBuilder(sourceContentType.xContent(), streamOutput)) {
+                try (XContentBuilder builder = new XContentBuilder(sourceContentType.xContent(), streamOutput)) {
-                        builder.value(value);
+                    builder.value(value);
-                        sourceFilteredAsBytes = BytesReference.bytes(builder);
+                    sourceFilteredAsBytes = BytesReference.bytes(builder);
-                    }
-                } catch (IOException e) {
-                    throw new ElasticsearchException("Error filtering source", e);
                 }
+            } catch (IOException e) {
+                throw new ElasticsearchException("Error filtering source", e);
             }
         }
 
         // TODO when using delete/none, we can still return the source as bytes by generating it (using the sourceContentType)
-        return new GetResult(concreteIndex, request.type(), request.id(), version, true,
+        return new GetResult(concreteIndex, request.type(), request.id(), version, true, sourceFilteredAsBytes, Collections.emptyMap());
-                sourceRequested ? sourceFilteredAsBytes : null, fields);
     }
 
     public static class Result {

server/src/main/java/org/elasticsearch/action/update/UpdateRequest.java

@@ -19,8 +19,6 @@
 
 package org.elasticsearch.action.update;
 
-import java.util.Arrays;
-
 import org.elasticsearch.Version;
 import org.elasticsearch.action.ActionRequestValidationException;
 import org.elasticsearch.action.DocWriteRequest;
@@ -30,11 +28,14 @@ import org.elasticsearch.action.support.WriteRequest;
 import org.elasticsearch.action.support.replication.ReplicationRequest;
 import org.elasticsearch.action.support.single.instance.InstanceShardOperationRequest;
 import org.elasticsearch.common.Nullable;
+import org.elasticsearch.common.ParseField;
+import org.elasticsearch.common.Strings;
 import org.elasticsearch.common.io.stream.StreamInput;
 import org.elasticsearch.common.io.stream.StreamOutput;
 import org.elasticsearch.common.lucene.uid.Versions;
 import org.elasticsearch.common.xcontent.LoggingDeprecationHandler;
 import org.elasticsearch.common.xcontent.NamedXContentRegistry;
+import org.elasticsearch.common.xcontent.ObjectParser;
 import org.elasticsearch.common.xcontent.ToXContentObject;
 import org.elasticsearch.common.xcontent.XContentBuilder;
 import org.elasticsearch.common.xcontent.XContentFactory;
@@ -48,15 +49,46 @@ import org.elasticsearch.script.ScriptType;
 import org.elasticsearch.search.fetch.subphase.FetchSourceContext;
 
 import java.io.IOException;
-import java.util.Collections;
 import java.util.HashMap;
-import java.util.List;
 import java.util.Map;
 
 import static org.elasticsearch.action.ValidateActions.addValidationError;
 
 public class UpdateRequest extends InstanceShardOperationRequest<UpdateRequest>
         implements DocWriteRequest<UpdateRequest>, WriteRequest<UpdateRequest>, ToXContentObject {
+    private static ObjectParser<UpdateRequest, Void> PARSER;
+
+    private static final ParseField SCRIPT_FIELD = new ParseField("script");
+    private static final ParseField SCRIPTED_UPSERT_FIELD = new ParseField("scripted_upsert");
+    private static final ParseField UPSERT_FIELD = new ParseField("upsert");
+    private static final ParseField DOC_FIELD = new ParseField("doc");
+    private static final ParseField DOC_AS_UPSERT_FIELD = new ParseField("doc_as_upsert");
+    private static final ParseField DETECT_NOOP_FIELD = new ParseField("detect_noop");
+    private static final ParseField SOURCE_FIELD = new ParseField("_source");
+
+    static {
+        PARSER = new ObjectParser<>(UpdateRequest.class.getSimpleName());
+        PARSER.declareField((request, script) -> request.script = script,
+            (parser, context) -> Script.parse(parser), SCRIPT_FIELD, ObjectParser.ValueType.OBJECT_OR_STRING);
+        PARSER.declareBoolean(UpdateRequest::scriptedUpsert, SCRIPTED_UPSERT_FIELD);
+        PARSER.declareObject((request, builder) -> request.safeUpsertRequest().source(builder),
+            (parser, context) -> {
+                XContentBuilder builder = XContentFactory.contentBuilder(parser.contentType());
+                builder.copyCurrentStructure(parser);
+                return builder;
+            }, UPSERT_FIELD);
+        PARSER.declareObject((request, builder) -> request.safeDoc().source(builder),
+            (parser, context) -> {
+                XContentBuilder docBuilder = XContentFactory.contentBuilder(parser.contentType());
+                docBuilder.copyCurrentStructure(parser);
+                return docBuilder;
+            }, DOC_FIELD);
+        PARSER.declareBoolean(UpdateRequest::docAsUpsert, DOC_AS_UPSERT_FIELD);
+        PARSER.declareBoolean(UpdateRequest::detectNoop, DETECT_NOOP_FIELD);
+        PARSER.declareField(UpdateRequest::fetchSource,
+            (parser, context) -> FetchSourceContext.fromXContent(parser), SOURCE_FIELD,
+            ObjectParser.ValueType.OBJECT_ARRAY_BOOLEAN_OR_STRING);
+    }
 
     private String type;
     private String id;
@@ -66,7 +98,6 @@ public class UpdateRequest extends InstanceShardOperationRequest<UpdateRequest>
     @Nullable
     Script script;
 
-    private String[] fields;
     private FetchSourceContext fetchSourceContext;
 
     private long version = Versions.MATCH_ANY;
@@ -365,16 +396,6 @@ public class UpdateRequest extends InstanceShardOperationRequest<UpdateRequest>
         return this;
     }
 
-    /**
-     * Explicitly specify the fields that will be returned. By default, nothing is returned.
-     * @deprecated Use {@link UpdateRequest#fetchSource(String[], String[])} instead
-     */
-    @Deprecated
-    public UpdateRequest fields(String... fields) {
-        this.fields = fields;
-        return this;
-    }
-
     /**
      * Indicate that _source should be returned with every hit, with an
      * "include" and/or "exclude" set which can include simple wildcard
@@ -389,7 +410,9 @@ public class UpdateRequest extends InstanceShardOperationRequest<UpdateRequest>
      */
     public UpdateRequest fetchSource(@Nullable String include, @Nullable String exclude) {
         FetchSourceContext context = this.fetchSourceContext == null ? FetchSourceContext.FETCH_SOURCE : this.fetchSourceContext;
-        this.fetchSourceContext = new FetchSourceContext(context.fetchSource(), new String[] {include}, new String[]{exclude});
+        String[] includes = include == null ? Strings.EMPTY_ARRAY : new String[]{include};
+        String[] excludes = exclude == null ? Strings.EMPTY_ARRAY : new String[]{exclude};
+        this.fetchSourceContext = new FetchSourceContext(context.fetchSource(), includes, excludes);
         return this;
     }
 
@@ -428,16 +451,6 @@ public class UpdateRequest extends InstanceShardOperationRequest<UpdateRequest>
         return this;
     }
 
-
-    /**
-     * Get the fields to be returned.
-     * @deprecated Use {@link UpdateRequest#fetchSource()} instead
-     */
-    @Deprecated
-    public String[] fields() {
-        return fields;
-    }
-
     /**
      * Gets the {@link FetchSourceContext} which defines how the _source should
      * be fetched.
@@ -707,49 +720,7 @@ public class UpdateRequest extends InstanceShardOperationRequest<UpdateRequest>
     }
 
     public UpdateRequest fromXContent(XContentParser parser) throws IOException {
-        Script script = null;
+        return PARSER.parse(parser, this, null);
-        XContentParser.Token token = parser.nextToken();
-        if (token == null) {
-            return this;
-        }
-        String currentFieldName = null;
-        while ((token = parser.nextToken()) != XContentParser.Token.END_OBJECT) {
-            if (token == XContentParser.Token.FIELD_NAME) {
-                currentFieldName = parser.currentName();
-            } else if ("script".equals(currentFieldName)) {
-                script = Script.parse(parser);
-            } else if ("scripted_upsert".equals(currentFieldName)) {
-                scriptedUpsert = parser.booleanValue();
-            } else if ("upsert".equals(currentFieldName)) {
-                XContentBuilder builder = XContentFactory.contentBuilder(parser.contentType());
-                builder.copyCurrentStructure(parser);
-                safeUpsertRequest().source(builder);
-            } else if ("doc".equals(currentFieldName)) {
-                XContentBuilder docBuilder = XContentFactory.contentBuilder(parser.contentType());
-                docBuilder.copyCurrentStructure(parser);
-                safeDoc().source(docBuilder);
-            } else if ("doc_as_upsert".equals(currentFieldName)) {
-                docAsUpsert(parser.booleanValue());
-            } else if ("detect_noop".equals(currentFieldName)) {
-                detectNoop(parser.booleanValue());
-            } else if ("fields".equals(currentFieldName)) {
-                List<Object> fields = null;
-                if (token == XContentParser.Token.START_ARRAY) {
-                    fields = (List) parser.list();
-                } else if (token.isValue()) {
-                    fields = Collections.singletonList(parser.text());
-                }
-                if (fields != null) {
-                    fields(fields.toArray(new String[fields.size()]));
-                }
-            } else if ("_source".equals(currentFieldName)) {
-                fetchSourceContext = FetchSourceContext.fromXContent(parser);
-            }
-        }
-        if (script != null) {
-            this.script = script;
-        }
-        return this;
     }
 
     public boolean docAsUpsert() {
@@ -789,7 +760,12 @@ public class UpdateRequest extends InstanceShardOperationRequest<UpdateRequest>
             doc = new IndexRequest();
             doc.readFrom(in);
         }
-        fields = in.readOptionalStringArray();
+        if (in.getVersion().before(Version.V_7_0_0_alpha1)) {
+            String[] fields = in.readOptionalStringArray();
+            if (fields != null) {
+                throw new IllegalArgumentException("[fields] is no longer supported");
+            }
+        }
         fetchSourceContext = in.readOptionalWriteable(FetchSourceContext::new);
         if (in.readBoolean()) {
             upsertRequest = new IndexRequest();
@@ -830,7 +806,9 @@ public class UpdateRequest extends InstanceShardOperationRequest<UpdateRequest>
             doc.id(id);
             doc.writeTo(out);
         }
-        out.writeOptionalStringArray(fields);
+        if (out.getVersion().before(Version.V_7_0_0_alpha1)) {
+            out.writeOptionalStringArray(null);
+        }
         out.writeOptionalWriteable(fetchSourceContext);
         if (upsertRequest == null) {
             out.writeBoolean(false);
@@ -880,9 +858,6 @@ public class UpdateRequest extends InstanceShardOperationRequest<UpdateRequest>
         if (detectNoop == false) {
             builder.field("detect_noop", detectNoop);
         }
-        if (fields != null) {
-            builder.array("fields", fields);
-        }
         if (fetchSourceContext != null) {
             builder.field("_source", fetchSourceContext);
         }
@@ -908,9 +883,6 @@ public class UpdateRequest extends InstanceShardOperationRequest<UpdateRequest>
         }
         res.append(", scripted_upsert[").append(scriptedUpsert).append("]");
         res.append(", detect_noop[").append(detectNoop).append("]");
-        if (fields != null) {
-            res.append(", fields[").append(Arrays.toString(fields)).append("]");
-        }
         return res.append("}").toString();
     }
 }

server/src/main/java/org/elasticsearch/action/update/UpdateRequestBuilder.java

@@ -26,20 +26,15 @@ import org.elasticsearch.action.support.replication.ReplicationRequest;
 import org.elasticsearch.action.support.single.instance.InstanceShardOperationRequestBuilder;
 import org.elasticsearch.client.ElasticsearchClient;
 import org.elasticsearch.common.Nullable;
-import org.elasticsearch.common.logging.DeprecationLogger;
-import org.elasticsearch.common.logging.Loggers;
 import org.elasticsearch.common.xcontent.XContentBuilder;
 import org.elasticsearch.common.xcontent.XContentType;
 import org.elasticsearch.index.VersionType;
-import org.elasticsearch.rest.action.document.RestUpdateAction;
 import org.elasticsearch.script.Script;
 
 import java.util.Map;
 
 public class UpdateRequestBuilder extends InstanceShardOperationRequestBuilder<UpdateRequest, UpdateResponse, UpdateRequestBuilder>
         implements WriteRequestBuilder<UpdateRequestBuilder> {
-    private static final DeprecationLogger DEPRECATION_LOGGER =
-        new DeprecationLogger(Loggers.getLogger(RestUpdateAction.class));
 
     public UpdateRequestBuilder(ElasticsearchClient client, UpdateAction action) {
         super(client, action, new UpdateRequest());
@@ -87,17 +82,6 @@ public class UpdateRequestBuilder extends InstanceShardOperationRequestBuilder<U
         return this;
     }
 
-    /**
-     * Explicitly specify the fields that will be returned. By default, nothing is returned.
-     * @deprecated Use {@link UpdateRequestBuilder#setFetchSource(String[], String[])} instead
-     */
-    @Deprecated
-    public UpdateRequestBuilder setFields(String... fields) {
-        DEPRECATION_LOGGER.deprecated("Deprecated field [fields] used, expected [_source] instead");
-        request.fields(fields);
-        return this;
-    }
-
     /**
      * Indicate that _source should be returned with every hit, with an
      * "include" and/or "exclude" set which can include simple wildcard

server/src/main/java/org/elasticsearch/index/translog/Translog.java

@@ -585,12 +585,7 @@ public class Translog extends AbstractIndexShardComponent implements IndexShardC
             if (current.generation == location.generation) {
                 // no need to fsync here the read operation will ensure that buffers are written to disk
                 // if they are still in RAM and we are reading onto that position
-                try {
+                return current.read(location);
-                    return current.read(location);
-                } catch (final Exception ex) {
-                    closeOnTragicEvent(ex);
-                    throw ex;
-                }
             } else {
                 // read backwards - it's likely we need to read on that is recent
                 for (int i = readers.size() - 1; i >= 0; i--) {
@@ -600,6 +595,9 @@ public class Translog extends AbstractIndexShardComponent implements IndexShardC
                     }
                 }
             }
+        } catch (final Exception ex) {
+            closeOnTragicEvent(ex);
+            throw ex;
         }
         return null;
     }
@@ -749,15 +747,28 @@ public class Translog extends AbstractIndexShardComponent implements IndexShardC
         }
     }
 
+    /**
+     * Closes the translog if the current translog writer experienced a tragic exception.
+     *
+     * Note that in case this thread closes the translog it must not already be holding a read lock on the translog as it will acquire a
+     * write lock in the course of closing the translog
+     *
+     * @param ex if an exception occurs closing the translog, it will be suppressed into the provided exception
+     */
     private void closeOnTragicEvent(final Exception ex) {
+        // we can not hold a read lock here because closing will attempt to obtain a write lock and that would result in self-deadlock
+        assert readLock.isHeldByCurrentThread() == false : Thread.currentThread().getName();
         if (current.getTragicException() != null) {
             try {
                 close();
             } catch (final AlreadyClosedException inner) {
-                // don't do anything in this case. The AlreadyClosedException comes from TranslogWriter and we should not add it as suppressed because
+                /*
-                // will contain the Exception ex as cause. See also https://github.com/elastic/elasticsearch/issues/15941
+                 * Don't do anything in this case. The AlreadyClosedException comes from TranslogWriter and we should not add it as
+                 * suppressed because it will contain the provided exception as its cause. See also
+                 * https://github.com/elastic/elasticsearch/issues/15941.
+                 */
             } catch (final Exception inner) {
-                assert (ex != inner.getCause());
+                assert ex != inner.getCause();
                 ex.addSuppressed(inner);
             }
         }

server/src/main/java/org/elasticsearch/rest/action/document/RestBulkAction.java

@@ -24,9 +24,6 @@ import org.elasticsearch.action.bulk.BulkShardRequest;
 import org.elasticsearch.action.support.ActiveShardCount;
 import org.elasticsearch.client.Requests;
 import org.elasticsearch.client.node.NodeClient;
-import org.elasticsearch.common.Strings;
-import org.elasticsearch.common.logging.DeprecationLogger;
-import org.elasticsearch.common.logging.Loggers;
 import org.elasticsearch.common.settings.Settings;
 import org.elasticsearch.index.mapper.MapperService;
 import org.elasticsearch.rest.BaseRestHandler;
@@ -50,8 +47,6 @@ import static org.elasticsearch.rest.RestRequest.Method.PUT;
  * </pre>
  */
 public class RestBulkAction extends BaseRestHandler {
-    private static final DeprecationLogger DEPRECATION_LOGGER =
-        new DeprecationLogger(Loggers.getLogger(RestBulkAction.class));
 
     private final boolean allowExplicitIndex;
 
@@ -80,11 +75,6 @@ public class RestBulkAction extends BaseRestHandler {
         String defaultType = request.param("type", MapperService.SINGLE_MAPPING_NAME);
         String defaultRouting = request.param("routing");
         FetchSourceContext defaultFetchSourceContext = FetchSourceContext.parseFromRestRequest(request);
-        String fieldsParam = request.param("fields");
-        if (fieldsParam != null) {
-            DEPRECATION_LOGGER.deprecated("Deprecated field [fields] used, expected [_source] instead");
-        }
-        String[] defaultFields = fieldsParam != null ? Strings.commaDelimitedListToStringArray(fieldsParam) : null;
         String defaultPipeline = request.param("pipeline");
         String waitForActiveShards = request.param("wait_for_active_shards");
         if (waitForActiveShards != null) {
@@ -92,7 +82,7 @@ public class RestBulkAction extends BaseRestHandler {
         }
         bulkRequest.timeout(request.paramAsTime("timeout", BulkShardRequest.DEFAULT_TIMEOUT));
         bulkRequest.setRefreshPolicy(request.param("refresh"));
-        bulkRequest.add(request.requiredContent(), defaultIndex, defaultType, defaultRouting, defaultFields,
+        bulkRequest.add(request.requiredContent(), defaultIndex, defaultType, defaultRouting,
             defaultFetchSourceContext, defaultPipeline, null, allowExplicitIndex, request.getXContentType());
 
         return channel -> client.bulk(bulkRequest, new RestStatusToXContentListener<>(channel));

server/src/main/java/org/elasticsearch/rest/action/document/RestUpdateAction.java

@@ -23,9 +23,6 @@ import org.elasticsearch.action.index.IndexRequest;
 import org.elasticsearch.action.support.ActiveShardCount;
 import org.elasticsearch.action.update.UpdateRequest;
 import org.elasticsearch.client.node.NodeClient;
-import org.elasticsearch.common.Strings;
-import org.elasticsearch.common.logging.DeprecationLogger;
-import org.elasticsearch.common.logging.Loggers;
 import org.elasticsearch.common.settings.Settings;
 import org.elasticsearch.index.VersionType;
 import org.elasticsearch.rest.BaseRestHandler;
@@ -40,8 +37,6 @@ import java.io.IOException;
 import static org.elasticsearch.rest.RestRequest.Method.POST;
 
 public class RestUpdateAction extends BaseRestHandler {
-    private static final DeprecationLogger DEPRECATION_LOGGER =
-        new DeprecationLogger(Loggers.getLogger(RestUpdateAction.class));
 
     public RestUpdateAction(Settings settings, RestController controller) {
         super(settings);
@@ -65,15 +60,7 @@ public class RestUpdateAction extends BaseRestHandler {
         }
         updateRequest.docAsUpsert(request.paramAsBoolean("doc_as_upsert", updateRequest.docAsUpsert()));
         FetchSourceContext fetchSourceContext = FetchSourceContext.parseFromRestRequest(request);
-        String sField = request.param("fields");
+        if (fetchSourceContext != null) {
-        if (sField != null && fetchSourceContext != null) {
-            throw new IllegalArgumentException("[fields] and [_source] cannot be used in the same request");
-        }
-        if (sField != null) {
-            DEPRECATION_LOGGER.deprecated("Deprecated field [fields] used, expected [_source] instead");
-            String[] sFields = Strings.splitStringByCommaToArray(sField);
-            updateRequest.fields(sFields);
-        } else if (fetchSourceContext != null) {
             updateRequest.fetchSource(fetchSourceContext);
         }
 

server/src/main/java/org/elasticsearch/search/aggregations/metrics/percentiles/PercentilesAggregationBuilder.java

@@ -26,7 +26,6 @@ import org.elasticsearch.common.xcontent.ObjectParser;
 import org.elasticsearch.common.xcontent.XContentBuilder;
 import org.elasticsearch.common.xcontent.XContentParser;
 import org.elasticsearch.search.aggregations.AggregationBuilder;
-import org.elasticsearch.search.aggregations.AggregatorFactories;
 import org.elasticsearch.search.aggregations.AggregatorFactories.Builder;
 import org.elasticsearch.search.aggregations.AggregatorFactory;
 import org.elasticsearch.search.aggregations.metrics.percentiles.hdr.HDRPercentilesAggregatorFactory;
@@ -50,7 +49,7 @@ import java.util.function.Consumer;
 public class PercentilesAggregationBuilder extends LeafOnly<ValuesSource.Numeric, PercentilesAggregationBuilder> {
     public static final String NAME = Percentiles.TYPE_NAME;
 
-    public static final double[] DEFAULT_PERCENTS = new double[] { 1, 5, 25, 50, 75, 95, 99 };
+    private static final double[] DEFAULT_PERCENTS = new double[] { 1, 5, 25, 50, 75, 95, 99 };
     public static final ParseField PERCENTS_FIELD = new ParseField("percents");
     public static final ParseField KEYED_FIELD = new ParseField("keyed");
     public static final ParseField METHOD_FIELD = new ParseField("method");

server/src/main/java/org/elasticsearch/search/fetch/subphase/highlight/HighlightBuilder.java

@@ -75,9 +75,9 @@ public class HighlightBuilder extends AbstractHighlighterBuilder<HighlightBuilde
     /** the default number of fragments size in characters */
     public static final int DEFAULT_FRAGMENT_CHAR_SIZE = 100;
     /** the default opening tag  */
-    public static final String[] DEFAULT_PRE_TAGS = new String[]{"<em>"};
+    static final String[] DEFAULT_PRE_TAGS = new String[]{"<em>"};
     /** the default closing tag  */
-    public static final String[] DEFAULT_POST_TAGS = new String[]{"</em>"};
+    static final String[] DEFAULT_POST_TAGS = new String[]{"</em>"};
 
     /** the default opening tags when <tt>tag_schema = "styled"</tt>  */
     public static final String[] DEFAULT_STYLED_PRE_TAG = {

server/src/test/java/org/elasticsearch/action/bulk/BulkRequestTests.java

@@ -94,12 +94,12 @@ public class BulkRequestTests extends ESTestCase {
         BulkRequest bulkRequest = new BulkRequest();
         bulkRequest.add(bulkAction.getBytes(StandardCharsets.UTF_8), 0, bulkAction.length(), null, null, XContentType.JSON);
         assertThat(bulkRequest.numberOfActions(), equalTo(4));
-        assertThat(((UpdateRequest) bulkRequest.requests().get(0)).id(), equalTo("1"));
+        assertThat(bulkRequest.requests().get(0).id(), equalTo("1"));
         assertThat(((UpdateRequest) bulkRequest.requests().get(0)).retryOnConflict(), equalTo(2));
         assertThat(((UpdateRequest) bulkRequest.requests().get(0)).doc().source().utf8ToString(), equalTo("{\"field\":\"value\"}"));
-        assertThat(((UpdateRequest) bulkRequest.requests().get(1)).id(), equalTo("0"));
+        assertThat(bulkRequest.requests().get(1).id(), equalTo("0"));
-        assertThat(((UpdateRequest) bulkRequest.requests().get(1)).type(), equalTo("type1"));
+        assertThat(bulkRequest.requests().get(1).type(), equalTo("type1"));
-        assertThat(((UpdateRequest) bulkRequest.requests().get(1)).index(), equalTo("index1"));
+        assertThat(bulkRequest.requests().get(1).index(), equalTo("index1"));
         Script script = ((UpdateRequest) bulkRequest.requests().get(1)).script();
         assertThat(script, notNullValue());
         assertThat(script.getIdOrCode(), equalTo("counter += param1"));
@@ -107,20 +107,18 @@ public class BulkRequestTests extends ESTestCase {
         Map<String, Object> scriptParams = script.getParams();
         assertThat(scriptParams, notNullValue());
         assertThat(scriptParams.size(), equalTo(1));
-        assertThat(((Integer) scriptParams.get("param1")), equalTo(1));
+        assertThat(scriptParams.get("param1"), equalTo(1));
         assertThat(((UpdateRequest) bulkRequest.requests().get(1)).upsertRequest().source().utf8ToString(), equalTo("{\"counter\":1}"));
     }
 
     public void testBulkAllowExplicitIndex() throws Exception {
-        String bulkAction = copyToStringFromClasspath("/org/elasticsearch/action/bulk/simple-bulk.json");
+        String bulkAction1 = copyToStringFromClasspath("/org/elasticsearch/action/bulk/simple-bulk.json");
-        try {
+        Exception ex = expectThrows(Exception.class,
-            new BulkRequest().add(new BytesArray(bulkAction.getBytes(StandardCharsets.UTF_8)), null, null, false, XContentType.JSON);
+            () -> new BulkRequest().add(
-            fail();
+                new BytesArray(bulkAction1.getBytes(StandardCharsets.UTF_8)), null, null, false, XContentType.JSON));
-        } catch (Exception e) {
+        assertEquals("explicit index in bulk is not allowed", ex.getMessage());
 
-        }
+        String bulkAction = copyToStringFromClasspath("/org/elasticsearch/action/bulk/simple-bulk5.json");
-
-        bulkAction = copyToStringFromClasspath("/org/elasticsearch/action/bulk/simple-bulk5.json");
         new BulkRequest().add(new BytesArray(bulkAction.getBytes(StandardCharsets.UTF_8)), "test", null, false, XContentType.JSON);
     }
 
@@ -177,6 +175,16 @@ public class BulkRequestTests extends ESTestCase {
         assertThat(bulkRequest.numberOfActions(), equalTo(9));
     }
 
+    public void testBulkActionShouldNotContainArray() throws Exception {
+        String bulkAction = "{ \"index\":{\"_index\":[\"index1\", \"index2\"],\"_type\":\"type1\",\"_id\":\"1\"} }\r\n"
+            + "{ \"field1\" : \"value1\" }\r\n";
+        BulkRequest bulkRequest = new BulkRequest();
+        IllegalArgumentException exc = expectThrows(IllegalArgumentException.class,
+            () -> bulkRequest.add(bulkAction.getBytes(StandardCharsets.UTF_8), 0, bulkAction.length(), null, null, XContentType.JSON));
+        assertEquals(exc.getMessage(), "Malformed action/metadata line [1]" +
+            ", expected a simple value for field [_index] but found [START_ARRAY]");
+    }
+
     public void testBulkEmptyObject() throws Exception {
         String bulkIndexAction = "{ \"index\":{\"_index\":\"test\",\"_type\":\"type1\",\"_id\":\"1\"} }\r\n";
         String bulkIndexSource = "{ \"field1\" : \"value1\" }\r\n";
@@ -299,7 +307,7 @@ public class BulkRequestTests extends ESTestCase {
             out.write(xContentType.xContent().streamSeparator());
             try(XContentBuilder builder = XContentFactory.contentBuilder(xContentType, out)) {
                 builder.startObject();
-                builder.field("doc", "{}");
+                builder.startObject("doc").endObject();
                 Map<String,Object> values = new HashMap<>();
                 values.put("version", 2L);
                 values.put("_index", "index");

server/src/test/java/org/elasticsearch/action/bulk/BulkWithUpdatesIT.java

@@ -260,13 +260,13 @@ public class BulkWithUpdatesIT extends ESIntegTestCase {
         assertThat(bulkResponse.getItems().length, equalTo(3));
 
         bulkResponse = client().prepareBulk()
-                .add(client().prepareUpdate().setIndex("test").setType("type1").setId("1").setFields("field")
+                .add(client().prepareUpdate().setIndex("test").setType("type1").setId("1").setFetchSource("field", null)
                         .setScript(new Script(
                             ScriptType.INLINE, CustomScriptPlugin.NAME, "throw script exception on unknown var", Collections.emptyMap())))
-                .add(client().prepareUpdate().setIndex("test").setType("type1").setId("2").setFields("field")
+                .add(client().prepareUpdate().setIndex("test").setType("type1").setId("2").setFetchSource("field", null)
                         .setScript(new Script(
                             ScriptType.INLINE, CustomScriptPlugin.NAME, "ctx._source.field += 1", Collections.emptyMap())))
-                .add(client().prepareUpdate().setIndex("test").setType("type1").setId("3").setFields("field")
+                .add(client().prepareUpdate().setIndex("test").setType("type1").setId("3").setFetchSource("field", null)
                         .setScript(new Script(
                             ScriptType.INLINE, CustomScriptPlugin.NAME, "throw script exception on unknown var", Collections.emptyMap())))
                 .execute().actionGet();
@@ -279,7 +279,7 @@ public class BulkWithUpdatesIT extends ESIntegTestCase {
 
         assertThat(bulkResponse.getItems()[1].getResponse().getId(), equalTo("2"));
         assertThat(bulkResponse.getItems()[1].getResponse().getVersion(), equalTo(2L));
-        assertThat(((UpdateResponse) bulkResponse.getItems()[1].getResponse()).getGetResult().field("field").getValue(), equalTo(2));
+        assertThat(((UpdateResponse) bulkResponse.getItems()[1].getResponse()).getGetResult().sourceAsMap().get("field"), equalTo(2));
         assertThat(bulkResponse.getItems()[1].getFailure(), nullValue());
 
         assertThat(bulkResponse.getItems()[2].getFailure().getId(), equalTo("3"));
@@ -303,7 +303,7 @@ public class BulkWithUpdatesIT extends ESIntegTestCase {
             builder.add(
                     client().prepareUpdate()
                             .setIndex("test").setType("type1").setId(Integer.toString(i))
-                            .setFields("counter")
+                            .setFetchSource("counter", null)
                             .setScript(script)
                             .setUpsert(jsonBuilder().startObject().field("counter", 1).endObject()));
         }
@@ -319,7 +319,7 @@ public class BulkWithUpdatesIT extends ESIntegTestCase {
             assertThat(response.getItems()[i].getOpType(), equalTo(OpType.UPDATE));
             assertThat(response.getItems()[i].getResponse().getId(), equalTo(Integer.toString(i)));
             assertThat(response.getItems()[i].getResponse().getVersion(), equalTo(1L));
-            assertThat(((UpdateResponse) response.getItems()[i].getResponse()).getGetResult().field("counter").getValue(), equalTo(1));
+            assertThat(((UpdateResponse) response.getItems()[i].getResponse()).getGetResult().sourceAsMap().get("counter"), equalTo(1));
 
             for (int j = 0; j < 5; j++) {
                 GetResponse getResponse = client().prepareGet("test", "type1", Integer.toString(i)).execute()
@@ -333,7 +333,7 @@ public class BulkWithUpdatesIT extends ESIntegTestCase {
         builder = client().prepareBulk();
         for (int i = 0; i < numDocs; i++) {
             UpdateRequestBuilder updateBuilder = client().prepareUpdate().setIndex("test").setType("type1").setId(Integer.toString(i))
-                    .setFields("counter");
+                    .setFetchSource("counter", null);
             if (i % 2 == 0) {
                 updateBuilder.setScript(script);
             } else {
@@ -357,7 +357,7 @@ public class BulkWithUpdatesIT extends ESIntegTestCase {
             assertThat(response.getItems()[i].getOpType(), equalTo(OpType.UPDATE));
             assertThat(response.getItems()[i].getResponse().getId(), equalTo(Integer.toString(i)));
             assertThat(response.getItems()[i].getResponse().getVersion(), equalTo(2L));
-            assertThat(((UpdateResponse) response.getItems()[i].getResponse()).getGetResult().field("counter").getValue(), equalTo(2));
+            assertThat(((UpdateResponse) response.getItems()[i].getResponse()).getGetResult().sourceAsMap().get("counter"), equalTo(2));
         }
 
         builder = client().prepareBulk();

server/src/test/java/org/elasticsearch/action/update/UpdateRequestTests.java

@@ -61,7 +61,6 @@ import static org.elasticsearch.common.xcontent.XContentFactory.jsonBuilder;
 import static org.elasticsearch.common.xcontent.XContentHelper.toXContent;
 import static org.elasticsearch.script.MockScriptEngine.mockInlineScript;
 import static org.elasticsearch.test.hamcrest.ElasticsearchAssertions.assertToXContentEquivalent;
-import static org.hamcrest.Matchers.arrayContaining;
 import static org.hamcrest.Matchers.contains;
 import static org.hamcrest.Matchers.equalTo;
 import static org.hamcrest.Matchers.instanceOf;
@@ -277,17 +276,26 @@ public class UpdateRequestTests extends ESTestCase {
         assertThat(((Map) doc.get("compound")).get("field2").toString(), equalTo("value2"));
     }
 
-    // Related to issue 15338
+    public void testUnknownFieldParsing() throws Exception {
-    public void testFieldsParsing() throws Exception {
+        UpdateRequest request = new UpdateRequest("test", "type", "1");
-        UpdateRequest request = new UpdateRequest("test", "type1", "1").fromXContent(
+        XContentParser contentParser = createParser(XContentFactory.jsonBuilder()
-                createParser(JsonXContent.jsonXContent, new BytesArray("{\"doc\": {\"field1\": \"value1\"}, \"fields\": \"_source\"}")));
+                .startObject()
-        assertThat(request.doc().sourceAsMap().get("field1").toString(), equalTo("value1"));
+                    .field("unknown_field", "test")
-        assertThat(request.fields(), arrayContaining("_source"));
+                .endObject());
 
-        request = new UpdateRequest("test", "type2", "2").fromXContent(createParser(JsonXContent.jsonXContent,
+        IllegalArgumentException ex = expectThrows(IllegalArgumentException.class, () -> request.fromXContent(contentParser));
-                new BytesArray("{\"doc\": {\"field2\": \"value2\"}, \"fields\": [\"field1\", \"field2\"]}")));
+        assertEquals("[UpdateRequest] unknown field [unknown_field], parser not found", ex.getMessage());
-        assertThat(request.doc().sourceAsMap().get("field2").toString(), equalTo("value2"));
+
-        assertThat(request.fields(), arrayContaining("field1", "field2"));
+        UpdateRequest request2 = new UpdateRequest("test", "type", "1");
+        XContentParser unknownObject = createParser(XContentFactory.jsonBuilder()
+                .startObject()
+                    .field("script", "ctx.op = ctx._source.views == params.count ? 'delete' : 'none'")
+                    .startObject("params")
+                        .field("count", 1)
+                    .endObject()
+                .endObject());
+        ex = expectThrows(IllegalArgumentException.class, () -> request2.fromXContent(unknownObject));
+        assertEquals("[UpdateRequest] unknown field [params], parser not found", ex.getMessage());
     }
 
     public void testFetchSourceParsing() throws Exception {
@@ -444,13 +452,6 @@ public class UpdateRequestTests extends ESTestCase {
             BytesReference source = RandomObjects.randomSource(random(), xContentType);
             updateRequest.upsert(new IndexRequest().source(source, xContentType));
         }
-        if (randomBoolean()) {
-            String[] fields = new String[randomIntBetween(0, 5)];
-            for (int i = 0; i < fields.length; i++) {
-                fields[i] = randomAlphaOfLength(5);
-            }
-            updateRequest.fields(fields);
-        }
         if (randomBoolean()) {
             if (randomBoolean()) {
                 updateRequest.fetchSource(randomBoolean());
@@ -487,10 +488,8 @@ public class UpdateRequestTests extends ESTestCase {
 
         assertEquals(updateRequest.detectNoop(), parsedUpdateRequest.detectNoop());
         assertEquals(updateRequest.docAsUpsert(), parsedUpdateRequest.docAsUpsert());
-        assertEquals(updateRequest.docAsUpsert(), parsedUpdateRequest.docAsUpsert());
         assertEquals(updateRequest.script(), parsedUpdateRequest.script());
         assertEquals(updateRequest.scriptedUpsert(), parsedUpdateRequest.scriptedUpsert());
-        assertArrayEquals(updateRequest.fields(), parsedUpdateRequest.fields());
         assertEquals(updateRequest.fetchSource(), parsedUpdateRequest.fetchSource());
 
         BytesReference finalBytes = toXContent(parsedUpdateRequest, xContentType, humanReadable);

server/src/test/java/org/elasticsearch/update/UpdateIT.java

@@ -225,7 +225,7 @@ public class UpdateIT extends ESIntegTestCase {
         UpdateResponse updateResponse = client().prepareUpdate(indexOrAlias(), "type1", "1")
                 .setDoc(XContentFactory.jsonBuilder().startObject().field("bar", "baz").endObject())
                 .setDocAsUpsert(true)
-                .setFields("_source")
+                .setFetchSource(true)
                 .execute().actionGet();
         assertThat(updateResponse.getIndex(), equalTo("test"));
         assertThat(updateResponse.getGetResult(), notNullValue());
@@ -241,7 +241,7 @@ public class UpdateIT extends ESIntegTestCase {
         assertThrows(client().prepareUpdate(indexOrAlias(), "type1", "1")
                 .setDoc(XContentFactory.jsonBuilder().startObject().field("bar", "baz").endObject())
                 .setDocAsUpsert(false)
-                .setFields("_source")
+                .setFetchSource(true)
                 .execute(), DocumentMissingException.class);
     }
 
@@ -264,7 +264,7 @@ public class UpdateIT extends ESIntegTestCase {
         updateResponse = client().prepareUpdate(indexOrAlias(), "type1", "1")
                 .setUpsert(XContentFactory.jsonBuilder().startObject().field("bar", "baz").endObject())
                 .setScript(new Script(ScriptType.INLINE, UPDATE_SCRIPTS, PUT_VALUES_SCRIPT, Collections.singletonMap("extra", "foo")))
-                .setFields("_source")
+                .setFetchSource(true)
                 .execute().actionGet();
 
         assertThat(updateResponse.getIndex(), equalTo("test"));
@@ -293,12 +293,9 @@ public class UpdateIT extends ESIntegTestCase {
         ensureGreen();
 
         Script fieldIncScript = new Script(ScriptType.INLINE, UPDATE_SCRIPTS, FIELD_INC_SCRIPT, Collections.singletonMap("field", "field"));
-        try {
+        DocumentMissingException ex = expectThrows(DocumentMissingException.class,
-            client().prepareUpdate(indexOrAlias(), "type1", "1").setScript(fieldIncScript).execute().actionGet();
+            () -> client().prepareUpdate(indexOrAlias(), "type1", "1").setScript(fieldIncScript).execute().actionGet());
-            fail();
+        assertEquals("[type1][1]: document missing", ex.getMessage());
-        } catch (DocumentMissingException e) {
-            // all is well
-        }
 
         client().prepareIndex("test", "type1", "1").setSource("field", 1).execute().actionGet();
 
@@ -353,19 +350,6 @@ public class UpdateIT extends ESIntegTestCase {
             assertThat(getResponse.isExists(), equalTo(false));
         }
 
-        // check fields parameter
-        client().prepareIndex("test", "type1", "1").setSource("field", 1).execute().actionGet();
-        updateResponse = client().prepareUpdate(indexOrAlias(), "type1", "1")
-            .setScript(fieldIncScript)
-            .setFields("field")
-            .setFetchSource(true)
-            .execute().actionGet();
-        assertThat(updateResponse.getIndex(), equalTo("test"));
-        assertThat(updateResponse.getGetResult(), notNullValue());
-        assertThat(updateResponse.getGetResult().getIndex(), equalTo("test"));
-        assertThat(updateResponse.getGetResult().sourceRef(), notNullValue());
-        assertThat(updateResponse.getGetResult().field("field").getValue(), notNullValue());
-
         // check _source parameter
         client().prepareIndex("test", "type1", "1").setSource("field1", 1, "field2", 2).execute().actionGet();
         updateResponse = client().prepareUpdate(indexOrAlias(), "type1", "1")
@@ -383,7 +367,7 @@ public class UpdateIT extends ESIntegTestCase {
         // check updates without script
         // add new field
         client().prepareIndex("test", "type1", "1").setSource("field", 1).execute().actionGet();
-        updateResponse = client().prepareUpdate(indexOrAlias(), "type1", "1").setDoc(XContentFactory.jsonBuilder().startObject().field("field2", 2).endObject()).execute().actionGet();
+        client().prepareUpdate(indexOrAlias(), "type1", "1").setDoc(XContentFactory.jsonBuilder().startObject().field("field2", 2).endObject()).execute().actionGet();
         for (int i = 0; i < 5; i++) {
             GetResponse getResponse = client().prepareGet("test", "type1", "1").execute().actionGet();
             assertThat(getResponse.getSourceAsMap().get("field").toString(), equalTo("1"));
@@ -391,7 +375,7 @@ public class UpdateIT extends ESIntegTestCase {
         }
 
         // change existing field
-        updateResponse = client().prepareUpdate(indexOrAlias(), "type1", "1").setDoc(XContentFactory.jsonBuilder().startObject().field("field", 3).endObject()).execute().actionGet();
+        client().prepareUpdate(indexOrAlias(), "type1", "1").setDoc(XContentFactory.jsonBuilder().startObject().field("field", 3).endObject()).execute().actionGet();
         for (int i = 0; i < 5; i++) {
             GetResponse getResponse = client().prepareGet("test", "type1", "1").execute().actionGet();
             assertThat(getResponse.getSourceAsMap().get("field").toString(), equalTo("3"));
@@ -409,7 +393,7 @@ public class UpdateIT extends ESIntegTestCase {
         testMap.put("map1", 8);
 
         client().prepareIndex("test", "type1", "1").setSource("map", testMap).execute().actionGet();
-        updateResponse = client().prepareUpdate(indexOrAlias(), "type1", "1").setDoc(XContentFactory.jsonBuilder().startObject().field("map", testMap3).endObject()).execute().actionGet();
+        client().prepareUpdate(indexOrAlias(), "type1", "1").setDoc(XContentFactory.jsonBuilder().startObject().field("map", testMap3).endObject()).execute().actionGet();
         for (int i = 0; i < 5; i++) {
             GetResponse getResponse = client().prepareGet("test", "type1", "1").execute().actionGet();
             Map map1 = (Map) getResponse.getSourceAsMap().get("map");
@@ -581,7 +565,7 @@ public class UpdateIT extends ESIntegTestCase {
             assertThat(response.getId(), equalTo(Integer.toString(i)));
             assertThat(response.isExists(), equalTo(true));
             assertThat(response.getVersion(), equalTo((long) numberOfThreads));
-            assertThat((Integer) response.getSource().get("field"), equalTo(numberOfThreads));
+            assertThat(response.getSource().get("field"), equalTo(numberOfThreads));
         }
     }
 

server/src/test/java/org/elasticsearch/update/UpdateNoopIT.java

@@ -248,7 +248,7 @@ public class UpdateNoopIT extends ESIntegTestCase {
         UpdateRequestBuilder updateRequest = client().prepareUpdate("test", "type1", "1")
                 .setDoc(xContentBuilder)
                 .setDocAsUpsert(true)
-                .setFields("_source");
+                .setFetchSource(true);
         if (detectNoop != null) {
             updateRequest.setDetectNoop(detectNoop);
         }