[ISSUE #9821] Fix getBrokerConfig no response issue for empty parameters (#9822)

* [ISSUE #9821] Fix getBrokerConfig no response issue for empty parameters

* Update

* Update test

Author: yx9o

tools/src/main/java/org/apache/rocketmq/tools/command/broker/GetBrokerConfigCommand.java

@@ -25,6 +25,7 @@
 
 import org.apache.commons.cli.CommandLine;
 import org.apache.commons.cli.Option;
+import org.apache.commons.cli.OptionGroup;
 import org.apache.commons.cli.Options;
 import org.apache.rocketmq.client.exception.MQBrokerException;
 import org.apache.rocketmq.remoting.RPCHook;
@@ -50,13 +51,11 @@ public String commandDesc() {
 
     @Override
     public Options buildCommandlineOptions(final Options options) {
-        Option opt = new Option("b", "brokerAddr", true, "get which broker");
-        opt.setRequired(false);
-        options.addOption(opt);
-
-        opt = new Option("c", "clusterName", true, "get which cluster");
-        opt.setRequired(false);
-        options.addOption(opt);
+        OptionGroup group = new OptionGroup();
+        group.addOption(new Option("b", "brokerAddr", true, "get which broker"));
+        group.addOption(new Option("c", "clusterName", true, "get which cluster"));
+        group.setRequired(true);
+        options.addOptionGroup(group);
 
         return options;
     }

tools/src/test/java/org/apache/rocketmq/tools/command/broker/GetBrokerConfigCommandTest.java

@@ -48,7 +48,7 @@ protected byte[] getBody() {
     public void testExecute() throws SubCommandException {
         GetBrokerConfigCommand cmd = new GetBrokerConfigCommand();
         Options options = ServerUtil.buildCommandlineOptions(new Options());
-        String[] subargs = new String[] {"-b 127.0.0.1:" + listenPort(), "-c default-cluster"};
+        String[] subargs = new String[] {"-b 127.0.0.1:" + listenPort()};
         final CommandLine commandLine =
             ServerUtil.parseCmdLine("mqadmin " + cmd.commandName(), subargs,
                 cmd.buildCommandlineOptions(options), new DefaultParser());