diff --git a/eventmesh-runtime/src/main/java/org/apache/eventmesh/runtime/core/protocol/http/processor/SubscribeProcessor.java b/eventmesh-runtime/src/main/java/org/apache/eventmesh/runtime/core/protocol/http/processor/SubscribeProcessor.java
index cd815220f0..01c156b56b 100644
--- a/eventmesh-runtime/src/main/java/org/apache/eventmesh/runtime/core/protocol/http/processor/SubscribeProcessor.java
+++ b/eventmesh-runtime/src/main/java/org/apache/eventmesh/runtime/core/protocol/http/processor/SubscribeProcessor.java
@@ -152,6 +152,7 @@ public void processRequest(ChannelHandlerContext ctx, AsyncContext<HttpCommand>
         try {
             if (!IPUtils.isValidDomainOrIp(url, eventMeshHTTPServer.getEventMeshHttpConfiguration().eventMeshIpv4BlackList,
                 eventMeshHTTPServer.getEventMeshHttpConfiguration().eventMeshIpv6BlackList)) {
+                httpLogger.error("subscriber url {} is not valid", url);
                 responseEventMeshCommand = request.createHttpCommandResponse(
                     subscribeResponseHeader,
                     SubscribeResponseBody
@@ -161,6 +162,7 @@ public void processRequest(ChannelHandlerContext ctx, AsyncContext<HttpCommand>
                 return;
             }
         } catch (Exception e) {
+            httpLogger.error("subscriber url {} is not valid, error {}", url, e.getMessage());
             responseEventMeshCommand = request.createHttpCommandResponse(
                 subscribeResponseHeader,
                 SubscribeResponseBody
diff --git a/tools/third-party-dependencies/known-dependencies.txt b/tools/third-party-dependencies/known-dependencies.txt
index 400f0fcf8f..5da0a3aad2 100644
--- a/tools/third-party-dependencies/known-dependencies.txt
+++ b/tools/third-party-dependencies/known-dependencies.txt
@@ -22,6 +22,7 @@ guava-29.0-jre.jar
 hamcrest-core-1.3.jar
 httpclient-4.5.2.jar
 httpcore-4.4.4.jar
+ipaddress-5.3.3.jar
 j2objc-annotations-1.3.jar
 jackson-annotations-2.11.0.jar
 jackson-core-2.11.0.jar
@@ -110,4 +111,3 @@ truth-0.30.jar
 zipkin-2.23.2.jar
 zipkin-reporter-2.16.3.jar
 zipkin-sender-okhttp3-2.16.3.jar
-ipaddress-5.3.3.jar