caigy commented on code in PR #5775:
URL: https://github.com/apache/rocketmq/pull/5775#discussion_r1058011595


##########
proxy/src/main/java/org/apache/rocketmq/proxy/grpc/v2/common/GrpcValidator.java:
##########
@@ -106,16 +100,17 @@ public void validateInvisibleTime(long invisibleTime, 
long minInvisibleTime) {
     }
 
     public void validateTag(String tag) {
-        if (StringUtils.isNotEmpty(tag)) {
-            if (StringUtils.isBlank(tag)) {
-                throw new GrpcProxyException(Code.ILLEGAL_MESSAGE_TAG, "tag 
cannot be the char sequence of whitespace");
-            }
-            if (tag.contains("|")) {
-                throw new GrpcProxyException(Code.ILLEGAL_MESSAGE_TAG, "tag 
cannot contain '|'");
-            }
-            if (containControlCharacter(tag)) {
-                throw new GrpcProxyException(Code.ILLEGAL_MESSAGE_TAG, "tag 
cannot contain control character");
-            }
+        if (StringUtils.isEmpty(tag)) {
+            return;
+        }
+        if (StringUtils.isBlank(tag)) {
+            throw new GrpcProxyException(Code.ILLEGAL_MESSAGE_TAG, "tag cannot 
be the char sequence of whitespace");
+        }
+        if (tag.contains("|")) {
+            throw new GrpcProxyException(Code.ILLEGAL_MESSAGE_TAG, "tag cannot 
contain '|'");
+        }
+        if (containControlCharacter(tag)) {
+            throw new GrpcProxyException(Code.ILLEGAL_MESSAGE_TAG, "tag cannot 
contain control character");

Review Comment:
   Is this modification related to this issue? If not, you'd better move it to 
another issue.



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