diff --git a/aws-greengrass-core-sdk-java-master/samples/HelloWorld/src/main/java/com/amazonaws/greengrass/examples/HelloWorld.java b/aws-greengrass-core-sdk-java-master/samples/HelloWorld/src/main/java/com/amazonaws/greengrass/examples/HelloWorld.java
index 5837b31f2..b07b616c3 100644
--- a/aws-greengrass-core-sdk-java-master/samples/HelloWorld/src/main/java/com/amazonaws/greengrass/examples/HelloWorld.java
+++ b/aws-greengrass-core-sdk-java-master/samples/HelloWorld/src/main/java/com/amazonaws/greengrass/examples/HelloWorld.java
@@ -33,6 +33,7 @@ public String handleRequest(Object input, Context context) {
     }
 }
 
+// test PR
 class PublishHelloWorld extends TimerTask {
     private IotDataClient iotDataClient = new IotDataClient();
     private String publishMessage = String.format("Hello world! Sent from Greengrass Core running on platform: %s-%s using Java", System.getProperty("os.name"), System.getProperty("os.version"));
diff --git a/aws-sdk-java-v2-master/http-clients/apache-client/src/main/java/software/amazon/awssdk/http/apache/ApacheHttpClient.java b/aws-sdk-java-v2-master/http-clients/apache-client/src/main/java/software/amazon/awssdk/http/apache/ApacheHttpClient.java
index 7855ba50b..f52b9db23 100644
--- a/aws-sdk-java-v2-master/http-clients/apache-client/src/main/java/software/amazon/awssdk/http/apache/ApacheHttpClient.java
+++ b/aws-sdk-java-v2-master/http-clients/apache-client/src/main/java/software/amazon/awssdk/http/apache/ApacheHttpClient.java
@@ -114,6 +114,7 @@ public final class ApacheHttpClient implements SdkHttpClient {
     private final ApacheHttpRequestConfig requestConfig;
     private final AttributeMap resolvedOptions;
 
+    // code change to fix the bug
     @SdkTestInternalApi
     ApacheHttpClient(ConnectionManagerAwareHttpClient httpClient,
                      ApacheHttpRequestConfig requestConfig,
diff --git a/aws-sdk-java-v2-master/http-clients/netty-nio-client/src/main/java/software/amazon/awssdk/http/nio/netty/NettyNioAsyncHttpClient.java b/aws-sdk-java-v2-master/http-clients/netty-nio-client/src/main/java/software/amazon/awssdk/http/nio/netty/NettyNioAsyncHttpClient.java
index be2931f01..1a557e8e2 100644
--- a/aws-sdk-java-v2-master/http-clients/netty-nio-client/src/main/java/software/amazon/awssdk/http/nio/netty/NettyNioAsyncHttpClient.java
+++ b/aws-sdk-java-v2-master/http-clients/netty-nio-client/src/main/java/software/amazon/awssdk/http/nio/netty/NettyNioAsyncHttpClient.java
@@ -210,7 +210,7 @@ private void closeEventLoopUninterruptibly(EventLoopGroup eventLoopGroup) throws
             Thread.currentThread().interrupt();
             throw new RuntimeException(e);
         } catch (TimeoutException e) {
-            log.error(String.format("Shutting down Netty EventLoopGroup did not complete within %s seconds",
+            log.error(String.format("Shutting down Netty EventLoopGroup did not complete within %d seconds",
                                     EVENTLOOP_SHUTDOWN_FUTURE_TIMEOUT_SECONDS));
         }
     }
diff --git a/aws-xray-sdk-java-master/aws-xray-recorder-sdk-core/src/main/java/com/amazonaws/xray/internal/UnsignedXrayClient.java b/aws-xray-sdk-java-master/aws-xray-recorder-sdk-core/src/main/java/com/amazonaws/xray/internal/UnsignedXrayClient.java
index da1b80855..78dc0ab8b 100644
--- a/aws-xray-sdk-java-master/aws-xray-recorder-sdk-core/src/main/java/com/amazonaws/xray/internal/UnsignedXrayClient.java
+++ b/aws-xray-sdk-java-master/aws-xray-recorder-sdk-core/src/main/java/com/amazonaws/xray/internal/UnsignedXrayClient.java
@@ -176,7 +176,7 @@ private static String readResponseString(HttpURLConnection connection) {
         try {
             return os.toString(StandardCharsets.UTF_8.name());
         } catch (UnsupportedEncodingException e) {
-            throw new IllegalStateException("UTF-8 not supported can't happen.");
+            throw new IllegalStateException("UTF-8 not supported can't happen.", e);
         }
     }