add jdk.incubator.vector module support for JDK 20+ (#8601) (#9494)

* add jdk.incubator.vector module support for JDK 20+

Adds support for the incubating jdk vector package (PANAMA) when using
jdk 20+ runtime.



* update changelog and fix typo



---------


(cherry picked from commit 62b66e5)

Signed-off-by: Nicholas Walter Knize <nknize@apache.org>
Signed-off-by: Heemin Kim <heemin@amazon.com>
Co-authored-by: Nick Knize <nknize@apache.org>

CHANGELOG.md

@@ -18,6 +18,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 - [Remote Store] Add Segment download stats to remotestore stats API ([#8718](https://github.com/opensearch-project/OpenSearch/pull/8718))
 - [Remote Store] Add remote segment transfer stats on NodesStats API ([#9168](https://github.com/opensearch-project/OpenSearch/pull/9168))
 - [Segment Replication] Support realtime reads for GET requests ([#9212](https://github.com/opensearch-project/OpenSearch/pull/9212))
+- Add jdk.incubator.vector module support for JDK 20+ ([#8601](https://github.com/opensearch-project/OpenSearch/pull/8601))
 
 ### Dependencies
 - Bump `org.apache.logging.log4j:log4j-core` from 2.17.1 to 2.20.0 ([#8307](https://github.com/opensearch-project/OpenSearch/pull/8307))

build.gradle

@@ -416,6 +416,9 @@ gradle.projectsEvaluated {
         if (BuildParams.runtimeJavaVersion > JavaVersion.VERSION_17) {
           task.jvmArgs += ["-Djava.security.manager=allow"]
         }
+        if (BuildParams.runtimeJavaVersion >= JavaVersion.VERSION_20) {
+          task.jvmArgs += ["--add-modules=jdk.incubator.vector"]
+        }
       }
     }
 

distribution/src/config/jvm.options

@@ -79,5 +79,9 @@ ${error.file}
 # Explicitly allow security manager (https://bugs.openjdk.java.net/browse/JDK-8270380)
 18-:-Djava.security.manager=allow
 
+# JDK 20+ Incubating Vector Module for SIMD optimizations;
+# disabling may reduce performance on vector optimized lucene
+20:--add-modules=jdk.incubator.vector
+
 # HDFS ForkJoinPool.common() support by SecurityManager
 -Djava.util.concurrent.ForkJoinPool.common.threadFactory=org.opensearch.secure_sm.SecuredForkJoinWorkerThreadFactory