diff --git a/language-agent-v2/JVMMetric.proto b/language-agent-v2/JVMMetric.proto
index e6353d8860c14d32b93a21bed24bf201dded489a..845624cdf247275ced94aaacfd3b5d6302c246aa 100644
--- a/language-agent-v2/JVMMetric.proto
+++ b/language-agent-v2/JVMMetric.proto
@@ -26,7 +26,7 @@ import "common/common.proto";
 import "common/JVM.proto";
 
 service JVMMetricReportService {
-    rpc collect (JVMMetrics) returns (Downstream) {
+    rpc collect (JVMMetricCollection) returns (Commands) {
     }
 }
 
diff --git a/language-agent-v2/trace.proto b/language-agent-v2/trace.proto
index 37f607eccaed603927c2992ed6d7a340ef9f567b..c38b3ebf8adabec3e64e5f8196929e7d2a356738 100644
--- a/language-agent-v2/trace.proto
+++ b/language-agent-v2/trace.proto
@@ -25,7 +25,7 @@ option csharp_namespace = "SkyWalking.NetworkProtocol";
 import "common/common.proto";
 
 service TraceSegmentReportService {
-    rpc collect (stream UpstreamSegment) returns (Downstream) {
+    rpc collect (stream UpstreamSegment) returns (Commands) {
     }
 }
 
diff --git a/language-agent/JVMMetricsService.proto b/language-agent/JVMMetricsService.proto
index dfc62e9858b8becbf4c28020e9784e868115fd5d..229f41a965d8858955a943b7b90a0b2e7bfa43d2 100644
--- a/language-agent/JVMMetricsService.proto
+++ b/language-agent/JVMMetricsService.proto
@@ -29,3 +29,8 @@ service JVMMetricsService {
     rpc collect (JVMMetrics) returns (Downstream) {
     }
 }
+
+message JVMMetrics {
+    repeated JVMMetric metrics = 1;
+    int32 applicationInstanceId = 2;
+}