diff --git a/CHANGELOG.md b/CHANGELOG.md
index ec142864f..feb1411e3 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -18,6 +18,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 ### Enhancements
 ### Bug Fixes 
 ### Infrastructure
+* Upgrade gradle to 8.4 [1289](https://github.com/opensearch-project/k-NN/pull/1289)
 ### Documentation
 ### Maintenance
 * Update developer guide to include M1 Setup [#1222](https://github.com/opensearch-project/k-NN/pull/1222)
diff --git a/build-tools/knnplugin-coverage.gradle b/build-tools/knnplugin-coverage.gradle
index 386cfcfda..eb3582dab 100644
--- a/build-tools/knnplugin-coverage.gradle
+++ b/build-tools/knnplugin-coverage.gradle
@@ -3,12 +3,15 @@
  *  SPDX-License-Identifier: Apache-2.0
  */
 
+apply plugin: 'jacoco'
+
+jacoco {
+    toolVersion = "0.8.10"
+}
+
 /**
- * ES Plugin build tools don't work with the Gradle Jacoco Plugin to report coverage out of the box.
- * https://github.com/elastic/elasticsearch/issues/28867.
- *
- * This code sets up coverage reporting manually for ES plugin tests. This is complicated because:
- *  1. The ES integTest Task doesn't implement Gradle's JavaForkOptions so we have to manually start the jacoco agent with the test JVM
+ * This code sets up coverage reporting manually for the k-NN plugin tests. This is complicated because:
+ *  1. The OS integTest Task doesn't implement Gradle's JavaForkOptions so we have to manually start the jacoco agent with the test JVM
  *  2. The cluster nodes are stopped using 'kill -9' which means jacoco can't dump it's execution output to a file on VM shutdown
  *  3. The Java Security Manager prevents JMX from writing execution output to the file.
  *
@@ -16,66 +19,31 @@
  *  cluster is stopped and dump it to a file. Luckily our current security policy seems to allow this. This will also probably
  *  break if there are multiple nodes in the integTestCluster. But for now... it sorta works.
  */
-
-import org.apache.tools.ant.taskdefs.condition.Os
-apply plugin: 'jacoco'
-
-// Get gradle to generate the required jvm agent arg for us using a dummy tasks of type Test. Unfortunately Elastic's
-// testing tasks don't derive from Test so the jacoco plugin can't do this automatically.
-def jacocoDir = "${buildDir}/jacoco"
-task dummyTest(type: Test) {
-    enabled = false
-    workingDir = file("/") // Force absolute path to jacoco agent jar
-    jacoco {
-        destinationFile = file("${jacocoDir}/test.exec")
-        destinationFile.parentFile.mkdirs()
-        jmx = true
-    }
-}
-
-task dummyIntegTest(type: Test) {
-    enabled = false
-    workingDir = file("/") // Force absolute path to jacoco agent jar
+integTest {
     jacoco {
-        destinationFile = file("${jacocoDir}/integTest.exec")
-        destinationFile.parentFile.mkdirs()
         jmx = true
     }
-}
 
-integTest {
-    systemProperty 'jacoco.dir', "${jacocoDir}"
+    systemProperty 'jacoco.dir', project.layout.buildDirectory.get().file("jacoco").asFile.absolutePath
     systemProperty 'jmx.serviceUrl', "service:jmx:rmi:///jndi/rmi://127.0.0.1:7777/jmxrmi"
 }
 
 jacocoTestReport {
     dependsOn integTest, test
-    executionData.from = [dummyTest.jacoco.destinationFile, dummyIntegTest.jacoco.destinationFile]
-    sourceDirectories.from = sourceSets.main.java.sourceDirectories
-    classDirectories.from = files(sourceSets.main.java.outputDir)
-
+    executionData.from = [integTest.jacoco.destinationFile, test.jacoco.destinationFile]
     reports {
-        html.enabled = true // human readable
-        csv.enabled = true
-        xml.enabled = true // for coverlay
+        html.getRequired().set(true) // human readable
+        csv.getRequired().set(true)
+        xml.getRequired().set(true) // for coverlay
     }
 }
 
-afterEvaluate {
-    jacocoTestReport.dependsOn integTest
+testClusters.integTest {
+    jvmArgs " ${integTest.jacoco.getAsJvmArg()}"
 
-    testClusters.integTest {
-        if (Os.isFamily(Os.FAMILY_WINDOWS)) {
-            // Replacing build with absolute path to fix the error "error opening zip file or JAR manifest missing : /build/tmp/expandedArchives/..../jacocoagent.jar"
-            jvmArgs " ${dummyIntegTest.jacoco.getAsJvmArg()}".replace('build',"${buildDir}")
-        } else {
-            jvmArgs " ${dummyIntegTest.jacoco.getAsJvmArg()}".replace('javaagent:','javaagent:/')
-        }
-
-        systemProperty 'com.sun.management.jmxremote', "true"
-        systemProperty 'com.sun.management.jmxremote.authenticate', "false"
-        systemProperty 'com.sun.management.jmxremote.port', "7777"
-        systemProperty 'com.sun.management.jmxremote.ssl', "false"
-        systemProperty 'java.rmi.server.hostname', "127.0.0.1"
-    }
+    systemProperty 'com.sun.management.jmxremote', "true"
+    systemProperty 'com.sun.management.jmxremote.authenticate', "false"
+    systemProperty 'com.sun.management.jmxremote.port', "7777"
+    systemProperty 'com.sun.management.jmxremote.ssl', "false"
+    systemProperty 'java.rmi.server.hostname', "127.0.0.1"
 }
diff --git a/build.gradle b/build.gradle
index bcd9b59bf..86df9eed5 100644
--- a/build.gradle
+++ b/build.gradle
@@ -36,9 +36,8 @@ plugins {
     id 'java-library'
     id 'java-test-fixtures'
     id 'idea'
-    id 'jacoco'
     id "com.diffplug.spotless" version "6.3.0" apply false
-    id 'io.freefair.lombok' version '6.4.3'
+    id 'io.freefair.lombok' version '8.4'
 }
 
 apply from: 'gradle/formatting.gradle'
@@ -123,6 +122,9 @@ compileJava {
 compileTestJava {
     options.compilerArgs.addAll(["-processor", 'lombok.launch.AnnotationProcessorHider$AnnotationProcessor'])
 }
+compileTestFixturesJava {
+    options.compilerArgs.addAll(["-processor", 'lombok.launch.AnnotationProcessorHider$AnnotationProcessor'])
+}
 
 def usingRemoteCluster = System.properties.containsKey('tests.rest.cluster') || System.properties.containsKey('tests.cluster')
 def usingMultiNode = project.properties.containsKey('numNodes')
@@ -135,10 +137,6 @@ if (!usingRemoteCluster) {
     }
 }
 
-jacoco {
-    toolVersion = "0.8.7"
-}
-
 check.dependsOn spotlessCheck
 check.dependsOn jacocoTestReport
 
diff --git a/gradle/wrapper/gradle-wrapper.jar b/gradle/wrapper/gradle-wrapper.jar
index 943f0cbfa..7f93135c4 100644
Binary files a/gradle/wrapper/gradle-wrapper.jar and b/gradle/wrapper/gradle-wrapper.jar differ
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
index fd0d6c243..b42703b94 100644
--- a/gradle/wrapper/gradle-wrapper.properties
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -5,8 +5,8 @@
 
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionSha256Sum=518a863631feb7452b8f1b3dc2aaee5f388355cc3421bbd0275fbeadd77e84b2
-distributionUrl=https\://services.gradle.org/distributions/gradle-7.6.1-all.zip
+distributionSha256Sum=f2b9ed0faf8472cbe469255ae6c86eddb77076c75191741b4a462f33128dd419
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.4-all.zip
 networkTimeout=10000
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
diff --git a/gradlew b/gradlew
index ab17f01df..a71dbba9b 100755
--- a/gradlew
+++ b/gradlew
@@ -87,10 +87,8 @@ done
 # This is normally unused
 # shellcheck disable=SC2034
 APP_BASE_NAME=${0##*/}
-APP_HOME=$( cd "${APP_HOME:-./}" && pwd -P ) || exit
-
-# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
-DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
+# Discard cd standard output in case $CDPATH is set (https://github.com/gradle/gradle/issues/25036)
+APP_HOME=$( cd "${APP_HOME:-./}" > /dev/null && pwd -P ) || exit
 
 # Use the maximum available, or set MAX_FD != -1 to use that value.
 MAX_FD=maximum
@@ -137,10 +135,13 @@ location of your Java installation."
     fi
 else
     JAVACMD=java
-    which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+    if ! command -v java >/dev/null 2>&1
+    then
+        die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
 
 Please set the JAVA_HOME variable in your environment to match the
 location of your Java installation."
+    fi
 fi
 
 # Increase the maximum file descriptors if we can.
@@ -148,7 +149,7 @@ if ! "$cygwin" && ! "$darwin" && ! "$nonstop" ; then
     case $MAX_FD in #(
       max*)
         # In POSIX sh, ulimit -H is undefined. That's why the result is checked to see if it worked.
-        # shellcheck disable=SC3045 
+        # shellcheck disable=SC2039,SC3045
         MAX_FD=$( ulimit -H -n ) ||
             warn "Could not query maximum file descriptor limit"
     esac
@@ -156,7 +157,7 @@ if ! "$cygwin" && ! "$darwin" && ! "$nonstop" ; then
       '' | soft) :;; #(
       *)
         # In POSIX sh, ulimit -n is undefined. That's why the result is checked to see if it worked.
-        # shellcheck disable=SC3045 
+        # shellcheck disable=SC2039,SC3045
         ulimit -n "$MAX_FD" ||
             warn "Could not set maximum file descriptor limit to $MAX_FD"
     esac
@@ -201,11 +202,15 @@ if "$cygwin" || "$msys" ; then
     done
 fi
 
-# Collect all arguments for the java command;
-#   * $DEFAULT_JVM_OPTS, $JAVA_OPTS, and $GRADLE_OPTS can contain fragments of
-#     shell script including quotes and variable substitutions, so put them in
-#     double quotes to make sure that they get re-expanded; and
-#   * put everything else in single quotes, so that it's not re-expanded.
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
+
+# Collect all arguments for the java command:
+#   * DEFAULT_JVM_OPTS, JAVA_OPTS, JAVA_OPTS, and optsEnvironmentVar are not allowed to contain shell fragments,
+#     and any embedded shellness will be escaped.
+#   * For example: A user cannot expect ${Hostname} to be expanded, as it is an environment variable and will be
+#     treated as '${Hostname}' itself on the command line.
 
 set -- \
         "-Dorg.gradle.appname=$APP_BASE_NAME" \
diff --git a/src/testFixtures/java/org/opensearch/knn/KNNRestTestCase.java b/src/testFixtures/java/org/opensearch/knn/KNNRestTestCase.java
index 011ec712c..642b8bfb9 100644
--- a/src/testFixtures/java/org/opensearch/knn/KNNRestTestCase.java
+++ b/src/testFixtures/java/org/opensearch/knn/KNNRestTestCase.java
@@ -8,6 +8,7 @@
 import com.google.common.base.Charsets;
 import com.google.common.io.Resources;
 import com.google.common.primitives.Floats;
+import lombok.extern.log4j.Log4j2;
 import org.apache.commons.lang.StringUtils;
 import org.apache.hc.core5.http.io.entity.EntityUtils;
 import org.opensearch.core.common.bytes.BytesReference;
@@ -52,7 +53,6 @@
 import java.net.URL;
 import java.nio.file.Files;
 import java.nio.file.Path;
-import java.nio.file.Paths;
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.Base64;
@@ -109,6 +109,7 @@
 /**
  * Base class for integration tests for KNN plugin. Contains several methods for testing KNN ES functionality.
  */
+@Log4j2
 public class KNNRestTestCase extends ODFERestTestCase {
     public static final String INDEX_NAME = "test_index";
     public static final String FIELD_NAME = "test_field";
@@ -136,9 +137,10 @@ public static void dumpCoverage() throws IOException, MalformedObjectNameExcepti
                 false
             );
 
-            Path path = Paths.get(jacocoBuildPath + "/integTest.exec");
+            Path path = Path.of(jacocoBuildPath, "integTest.exec");
             Files.write(path, proxy.getExecutionData(false));
         } catch (Exception ex) {
+            log.error("Failed to dump coverage: ", ex);
             throw new RuntimeException("Failed to dump coverage: " + ex);
         }
     }