[Feature 7155] add errlog when cmd err (#7157)

Co-authored-by: 十真 <shirenchuang.src@cainiao.com>

srvutil/src/main/java/org/apache/rocketmq/srvutil/ServerUtil.java

diff --git a/srvutil/src/main/java/org/apache/rocketmq/srvutil/ServerUtil.java b/srvutil/src/main/java/org/apache/rocketmq/srvutil/ServerUtil.java
index b00bad3..5a8a7cd 100644
--- a/srvutil/src/main/java/org/apache/rocketmq/srvutil/ServerUtil.java
+++ b/srvutil/src/main/java/org/apache/rocketmq/srvutil/ServerUtil.java
@@ -52,6 +52,7 @@
                 System.exit(0);
             }
         } catch (ParseException e) {
+            System.err.println(e.getMessage());
             hf.printHelp(appName, options, true);
             System.exit(1);
         }