diff --git a/src/main/java/org/opensearch/sdk/NamedWriteableRegistryAPI.java b/src/main/java/org/opensearch/sdk/NamedWriteableRegistryAPI.java
index 5863c6f47..fca1e6553 100644
--- a/src/main/java/org/opensearch/sdk/NamedWriteableRegistryAPI.java
+++ b/src/main/java/org/opensearch/sdk/NamedWriteableRegistryAPI.java
@@ -15,17 +15,16 @@
 import java.util.List;
 import java.util.Map;
 
-import org.opensearch.extensions.OpenSearchRequest;
 import org.apache.logging.log4j.LogManager;
 import org.apache.logging.log4j.Logger;
 import org.opensearch.common.io.stream.InputStreamStreamInput;
-import org.opensearch.common.io.stream.NamedWriteable;
 import org.opensearch.common.io.stream.NamedWriteableAwareStreamInput;
 import org.opensearch.common.io.stream.NamedWriteableRegistry;
 import org.opensearch.common.io.stream.NamedWriteableRegistryParseRequest;
-import org.opensearch.extensions.ExtensionBooleanResponse;
 import org.opensearch.common.io.stream.NamedWriteableRegistryResponse;
 import org.opensearch.common.io.stream.StreamInput;
+import org.opensearch.extensions.ExtensionBooleanResponse;
+import org.opensearch.extensions.OpenSearchRequest;
 
 /**
  * API used to handle named writeable registry requests from OpenSearch
@@ -122,7 +121,7 @@ public ExtensionBooleanResponse handleNamedWriteableRegistryParseRequest(NamedWr
                 try {
 
                     // TODO : Determine how extensions utilize parsed object (https://github.com/opensearch-project/OpenSearch/issues/4067)
-                    NamedWriteable namedWriteable = streamInput.readNamedWriteable(categoryClass);
+                    streamInput.readNamedWriteable(categoryClass);
                     status = true;
                 } catch (UnsupportedOperationException e) {
                     logger.info("Failed to parse named writeable", e);
diff --git a/src/main/java/org/opensearch/sdk/SDKClient.java b/src/main/java/org/opensearch/sdk/SDKClient.java
index 5e960b189..8d84b058f 100644
--- a/src/main/java/org/opensearch/sdk/SDKClient.java
+++ b/src/main/java/org/opensearch/sdk/SDKClient.java
@@ -10,10 +10,7 @@
 import java.io.IOException;
 
 import org.apache.http.HttpHost;
-
 import org.apache.http.conn.ssl.NoopHostnameVerifier;
-import org.apache.logging.log4j.LogManager;
-import org.apache.logging.log4j.Logger;
 import org.opensearch.client.RestClient;
 import org.opensearch.client.RestClientBuilder;
 import org.opensearch.client.json.jackson.JacksonJsonpMapper;
@@ -25,7 +22,6 @@
  * This class creates SDKClient for an extension to make requests to OpenSearch
  */
 public class SDKClient {
-    private final Logger logger = LogManager.getLogger(SDKClient.class);
     private OpenSearchClient javaClient;
     private RestClient restClient = null;
 
diff --git a/src/main/java/org/opensearch/sdk/TransportActions.java b/src/main/java/org/opensearch/sdk/TransportActions.java
index c80a3e13c..4f0710147 100644
--- a/src/main/java/org/opensearch/sdk/TransportActions.java
+++ b/src/main/java/org/opensearch/sdk/TransportActions.java
@@ -35,7 +35,7 @@ public class TransportActions {
     public <Request extends ActionRequest, Response extends ActionResponse> TransportActions(
         Map<String, Class<? extends TransportAction<Request, Response>>> transportActions
     ) {
-        this.transportActions = new HashMap(transportActions);
+        this.transportActions = new HashMap<>(transportActions);
     }
 
     /**
diff --git a/src/test/java/org/opensearch/sdk/TestNamedWriteableRegistryAPI.java b/src/test/java/org/opensearch/sdk/TestNamedWriteableRegistryAPI.java
index 65df73344..5a322d157 100644
--- a/src/test/java/org/opensearch/sdk/TestNamedWriteableRegistryAPI.java
+++ b/src/test/java/org/opensearch/sdk/TestNamedWriteableRegistryAPI.java
@@ -45,10 +45,6 @@ private static class Example implements NamedWriteable {
         public static final String NAME = "example";
         private final String message;
 
-        Example(String message) {
-            this.message = message;
-        }
-
         Example(StreamInput in) throws IOException {
             this.message = in.readString();
         }