diff --git a/proxy/src/main/java/org/apache/rocketmq/proxy/ProxyStartup.java b/proxy/src/main/java/org/apache/rocketmq/proxy/ProxyStartup.java
index 516a99506a..55f7526e58 100644
--- a/proxy/src/main/java/org/apache/rocketmq/proxy/ProxyStartup.java
+++ b/proxy/src/main/java/org/apache/rocketmq/proxy/ProxyStartup.java
@@ -81,7 +81,7 @@ public class ProxyStartup {
             System.exit(1);
         }
 
-        System.out.println(new Date() + " rmq-proxy startup successfully");
+        System.out.printf("%s%n", new Date() + " rmq-proxy startup successfully");
         log.info(new Date() + " rmq-proxy startup successfully");
     }
 
diff --git a/proxy/src/main/java/org/apache/rocketmq/proxy/grpc/v2/GrpcMessagingProcessor.java b/proxy/src/main/java/org/apache/rocketmq/proxy/grpc/v2/GrpcMessagingProcessor.java
index 586061b3e4..ad06e23074 100644
--- a/proxy/src/main/java/org/apache/rocketmq/proxy/grpc/v2/GrpcMessagingProcessor.java
+++ b/proxy/src/main/java/org/apache/rocketmq/proxy/grpc/v2/GrpcMessagingProcessor.java
@@ -44,7 +44,6 @@ import apache.rocketmq.v2.Status;
 import apache.rocketmq.v2.TelemetryCommand;
 import io.grpc.Context;
 import io.grpc.stub.StreamObserver;
-import java.util.Iterator;
 import java.util.concurrent.CompletableFuture;
 import org.apache.rocketmq.proxy.grpc.v2.adapter.ResponseBuilder;
 import org.apache.rocketmq.proxy.grpc.v2.adapter.ResponseWriter;
diff --git a/proxy/src/main/java/org/apache/rocketmq/proxy/grpc/v2/service/ClusterGrpcService.java b/proxy/src/main/java/org/apache/rocketmq/proxy/grpc/v2/service/ClusterGrpcService.java
index bea689d077..40258fbb83 100644
--- a/proxy/src/main/java/org/apache/rocketmq/proxy/grpc/v2/service/ClusterGrpcService.java
+++ b/proxy/src/main/java/org/apache/rocketmq/proxy/grpc/v2/service/ClusterGrpcService.java
@@ -56,7 +56,6 @@ import org.apache.rocketmq.proxy.common.TelemetryCommandManager;
 import org.apache.rocketmq.proxy.connector.ConnectorManager;
 import org.apache.rocketmq.proxy.connector.transaction.TransactionStateCheckRequest;
 import org.apache.rocketmq.proxy.connector.transaction.TransactionStateChecker;
-import org.apache.rocketmq.proxy.grpc.v2.adapter.ProxyMode;
 import org.apache.rocketmq.proxy.grpc.v2.service.cluster.ConsumerService;
 import org.apache.rocketmq.proxy.grpc.v2.service.cluster.ForwardClientService;
 import org.apache.rocketmq.proxy.grpc.v2.service.cluster.ProducerService;