diff --git a/oap-server/server-receiver-plugin/envoy-metrics-receiver-plugin/src/main/java/org/apache/skywalking/oap/server/receiver/envoy/als/K8sALSServiceMeshHTTPAnalysis.java b/oap-server/server-receiver-plugin/envoy-metrics-receiver-plugin/src/main/java/org/apache/skywalking/oap/server/receiver/envoy/als/K8sALSServiceMeshHTTPAnalysis.java
index 96b4367991faa357cfaaafcc97510495c8fe2b12..320a6305888b6df768aeb6777f30a5c204fef90f 100644
--- a/oap-server/server-receiver-plugin/envoy-metrics-receiver-plugin/src/main/java/org/apache/skywalking/oap/server/receiver/envoy/als/K8sALSServiceMeshHTTPAnalysis.java
+++ b/oap-server/server-receiver-plugin/envoy-metrics-receiver-plugin/src/main/java/org/apache/skywalking/oap/server/receiver/envoy/als/K8sALSServiceMeshHTTPAnalysis.java
@@ -175,7 +175,7 @@ public class K8sALSServiceMeshHTTPAnalysis implements ALSHTTPAnalysis {
                 if (request != null) {
                     endpoint = request.getPath();
                     String schema = request.getScheme();
-                    if (schema.equals("http") || schema.equals("https")) {
+                    if ("http".equals(schema) || "https".equals(schema)) {
                         protocol = Protocol.HTTP;
                     } else {
                         protocol = Protocol.gRPC;
@@ -278,7 +278,7 @@ public class K8sALSServiceMeshHTTPAnalysis implements ALSHTTPAnalysis {
                 if (request != null) {
                     endpoint = request.getPath();
                     String schema = request.getScheme();
-                    if (schema.equals("http") || schema.equals("https")) {
+                    if ("http".equals(schema) || "https".equals(schema)) {
                         protocol = Protocol.HTTP;
                     } else {
                         protocol = Protocol.gRPC;
diff --git a/oap-server/server-receiver-plugin/skywalking-trace-receiver-plugin/src/main/java/org/apache/skywalking/oap/server/receiver/trace/provider/parser/SegmentParse.java b/oap-server/server-receiver-plugin/skywalking-trace-receiver-plugin/src/main/java/org/apache/skywalking/oap/server/receiver/trace/provider/parser/SegmentParse.java
index 4d7a7606cb4c2b794cdc6a169854205036a48dbe..726adb00e007f3e5081d9bb025e7011276dc3f3d 100644
--- a/oap-server/server-receiver-plugin/skywalking-trace-receiver-plugin/src/main/java/org/apache/skywalking/oap/server/receiver/trace/provider/parser/SegmentParse.java
+++ b/oap-server/server-receiver-plugin/skywalking-trace-receiver-plugin/src/main/java/org/apache/skywalking/oap/server/receiver/trace/provider/parser/SegmentParse.java
@@ -275,7 +275,7 @@ public class SegmentParse {
             segmentParse.setStandardizationWorker(standardizationWorker);
             boolean parseResult = segmentParse.parse(bufferData, Source.Buffer);
             if (parseResult) {
-                segmentParse.TRACE_BUFFER_FILE_OUT.inc();
+                TRACE_BUFFER_FILE_OUT.inc();
             }
 
             return parseResult;
diff --git a/oap-server/server-receiver-plugin/skywalking-trace-receiver-plugin/src/main/java/org/apache/skywalking/oap/server/receiver/trace/provider/parser/SegmentParseV2.java b/oap-server/server-receiver-plugin/skywalking-trace-receiver-plugin/src/main/java/org/apache/skywalking/oap/server/receiver/trace/provider/parser/SegmentParseV2.java
index 565c1cd933f5b10787befd9585b2373b678f1f24..6c18c822a66cc3e2d7f738ff9cc454c6fdb37e81 100644
--- a/oap-server/server-receiver-plugin/skywalking-trace-receiver-plugin/src/main/java/org/apache/skywalking/oap/server/receiver/trace/provider/parser/SegmentParseV2.java
+++ b/oap-server/server-receiver-plugin/skywalking-trace-receiver-plugin/src/main/java/org/apache/skywalking/oap/server/receiver/trace/provider/parser/SegmentParseV2.java
@@ -275,7 +275,7 @@ public class SegmentParseV2 {
             segmentParse.setStandardizationWorker(standardizationWorker);
             boolean parseResult = segmentParse.parse(bufferData, SegmentSource.Buffer);
             if (parseResult) {
-                segmentParse.TRACE_BUFFER_FILE_OUT.inc();
+                TRACE_BUFFER_FILE_OUT.inc();
             }
 
             return parseResult;