Adding support for JDK17 and removing JDK8 (#2025)

* Adding support for JDK17 and removing JDK8

Signed-off-by: Martin Gaievski <gaievski@amazon.com>

* Merge overlaping PR, bumping min java version to 11

Signed-off-by: Martin Gaievski <gaievski@amazon.com>

* Removing references to JDK8 from dev guide

Signed-off-by: Martin Gaievski <gaievski@amazon.com>

.ci/java-versions.properties

@@ -14,6 +14,6 @@
 # are 'java' or 'openjdk' followed by the major release number.
 
 OPENSEARCH_BUILD_JAVA=openjdk11
-OPENSEARCH_RUNTIME_JAVA=java8
+OPENSEARCH_RUNTIME_JAVA=java11
 GRADLE_TASK=build
 GRADLE_EXTRA_ARGS=

DEVELOPER_GUIDE.md

@@ -3,7 +3,7 @@
     - [Git Clone OpenSearch Repo](#git-clone-opensearch-repo)
     - [Install Prerequisites](#install-prerequisites)
       - [JDK 11](#jdk-11)
-      - [JDK 8 and 14](#jdk-8-and-14)
+      - [JDK 14](#jdk-14)
       - [Runtime JDK](#runtime-jdk)
       - [Windows](#windows)
       - [Docker](#docker)
@@ -65,13 +65,13 @@ OpenSearch builds using Java 11 at a minimum. This means you must have a JDK 11
 
 Download Java 11 from [here](https://adoptium.net/releases.html?variant=openjdk11).
 
-#### JDK 8 and 14
+#### JDK 14
 
-To run the full suite of tests, download and install [JDK 8](https://adoptium.net/releases.html?variant=openjdk8) and [JDK 14](https://jdk.java.net/archive/) and set `JAVA8_HOME`, `JAVA11_HOME`, and `JAVA14_HOME`. They are required by the [backwards compatibility test](./TESTING.md#testing-backwards-compatibility).
+To run the full suite of tests, download and install [JDK 14](https://jdk.java.net/archive/) and set `JAVA11_HOME`, and `JAVA14_HOME`. They are required by the [backwards compatibility test](./TESTING.md#testing-backwards-compatibility).
 
 #### Runtime JDK
 
-By default, the test tasks use bundled JDK runtime, configured in `buildSrc/version.properties` and set to JDK 17 (LTS). Other kind of test tasks (integration, cluster, ... ) use the same runtime as `JAVA_HOME`. However, since OpenSearch supports JDK 8 as the runtime, the build supports compiling with JDK 11 and testing on a different version of JDK runtime. To do this, set `RUNTIME_JAVA_HOME` pointing to the Java home of another JDK installation, e.g. `RUNTIME_JAVA_HOME=/usr/lib/jvm/jdk-8`. Alternatively, the runtime JDK version could be provided as the command line argument, using combination of `runtime.java=<major JDK version>` property and `JAVA<major JDK version>_HOME` environment variable, for example `./gradlew -Druntime.java=17 ...` (in this case, the tooling expects `JAVA17_HOME` environment variable to be set).
+By default, the test tasks use bundled JDK runtime, configured in `buildSrc/version.properties` and set to JDK 17 (LTS). Other kind of test tasks (integration, cluster, ... ) use the same runtime as `JAVA_HOME`. However, the build supports compiling with JDK 11 and testing on a different version of JDK runtime. To do this, set `RUNTIME_JAVA_HOME` pointing to the Java home of another JDK installation, e.g. `RUNTIME_JAVA_HOME=/usr/lib/jvm/jdk-14`. Alternatively, the runtime JDK version could be provided as the command line argument, using combination of `runtime.java=<major JDK version>` property and `JAVA<major JDK version>_HOME` environment variable, for example `./gradlew -Druntime.java=17 ...` (in this case, the tooling expects `JAVA17_HOME` environment variable to be set).
 
 #### Windows
 

buildSrc/build.gradle

@@ -158,8 +158,8 @@ if (project != rootProject) {
   apply plugin: 'opensearch.publish'
 
   allprojects {
-    targetCompatibility = 10
+    targetCompatibility = 11
-    sourceCompatibility = 10
+    sourceCompatibility = 11
   }
 
   // groovydoc succeeds, but has some weird internal exception...

buildSrc/src/integTest/resources/org/opensearch/gradle/internal/fake_git/remote/.ci/java-versions.properties

@@ -28,5 +28,5 @@
 # under the License.
 #
 OPENSEARCH_BUILD_JAVA=openjdk11
-OPENSEARCH_RUNTIME_JAVA=java8
+OPENSEARCH_RUNTIME_JAVA=java11
 GRADLE_TASK=build

client/rest-high-level/src/main/java/org/opensearch/client/IndicesClient.java

@@ -1867,7 +1867,6 @@ public final class IndicesClient {
 
     /**
      * Validate a potentially expensive query without executing it.
-     * <p>
      *
      * @param validateQueryRequest the request
      * @param options the request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
@@ -1886,7 +1885,6 @@ public final class IndicesClient {
 
     /**
      * Asynchronously validate a potentially expensive query without executing it.
-     * <p>
      *
      * @param validateQueryRequest the request
      * @param options the request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized

client/rest-high-level/src/main/java/org/opensearch/client/IngestClient.java

@@ -175,7 +175,6 @@ public final class IngestClient {
 
     /**
      * Simulate a pipeline on a set of documents provided in the request
-     * <p>
      *
      * @param request the request
      * @param options the request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
@@ -194,7 +193,6 @@ public final class IngestClient {
 
     /**
      * Asynchronously simulate a pipeline on a set of documents provided in the request
-     * <p>
      *
      * @param request the request
      * @param options the request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized

client/rest-high-level/src/main/java/org/opensearch/client/SnapshotClient.java

@@ -293,7 +293,6 @@ public final class SnapshotClient {
 
     /**
      * Asynchronously creates a snapshot.
-     * <p>
      *
      * @return cancellable that may be used to cancel the request
      */
@@ -327,7 +326,6 @@ public final class SnapshotClient {
 
     /**
      * Asynchronously clones a snapshot.
-     * <p>
      *
      * @return cancellable that may be used to cancel the request
      */

gradle.properties

@@ -11,7 +11,12 @@
 
 org.gradle.warning.mode=none
 org.gradle.parallel=true
-org.gradle.jvmargs=-Xmx3g -XX:+HeapDumpOnOutOfMemoryError -Xss2m
+org.gradle.jvmargs=-Xmx3g -XX:+HeapDumpOnOutOfMemoryError -Xss2m \
+    --add-exports jdk.compiler/com.sun.tools.javac.api=ALL-UNNAMED \
+    --add-exports jdk.compiler/com.sun.tools.javac.file=ALL-UNNAMED \
+    --add-exports jdk.compiler/com.sun.tools.javac.parser=ALL-UNNAMED \
+    --add-exports jdk.compiler/com.sun.tools.javac.tree=ALL-UNNAMED \
+    --add-exports jdk.compiler/com.sun.tools.javac.util=ALL-UNNAMED
 options.forkOptions.memoryMaximumSize=2g
 
 # Disable duplicate project id detection

plugins/analysis-icu/src/main/java/org/opensearch/index/analysis/IndexableBinaryStringTools.java

@@ -48,7 +48,6 @@ import org.apache.lucene.analysis.tokenattributes.TermToBytesRefAttribute;
  * padding is indistinguishable from valid information.  To overcome this
  * problem, a char is appended, indicating the number of encoded bytes in the
  * final content char.
- * <p>
  *
  * @deprecated Implement {@link TermToBytesRefAttribute} and store bytes directly
  * instead. This class WAS removed in Lucene 5.0