branch-2.1: [fix](cluster)fix fe host may be contains Scope Identifier #52076 (#52398)

Cherry-picked from #52076

Co-authored-by: zhangdong <zhangdong@selectdb.com>

fe/fe-core/src/main/java/org/apache/doris/service/FrontendOptions.java

@@ -183,7 +183,20 @@ public class FrontendOptions {
             // so we call localAddr.getCanonicalHostName() at here
             return localAddr.getCanonicalHostName();
         }
-        return InetAddresses.toAddrString(localAddr);
+        return getIpByLocalAddr(localAddr);
+    }
+
+    /**
+     * get ip from addr
+     * @param addr InetAddress
+     * @return ip
+     */
+    public static String getIpByLocalAddr(InetAddress addr) {
+        String addrString = InetAddresses.toAddrString(addr);
+        if (addrString.contains("%")) {
+            addrString = addrString.split("%")[0];
+        }
+        return addrString;
     }
 
     private static void analyzePriorityCidrs() {

fe/fe-core/src/test/java/org/apache/doris/service/FrontendOptionsTest.java

@@ -0,0 +1,51 @@
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
+package org.apache.doris.service;
+
+import org.apache.doris.common.AnalysisException;
+
+import com.google.common.net.InetAddresses;
+import mockit.Expectations;
+import mockit.Mocked;
+import org.junit.Assert;
+import org.junit.Before;
+import org.junit.Test;
+
+import java.net.InetAddress;
+
+public class FrontendOptionsTest {
+    @Mocked
+    private InetAddresses inetAddresses;
+
+    @Before
+    public void setUp() throws NoSuchMethodException, SecurityException, AnalysisException {
+        new Expectations() {
+            {
+                inetAddresses.toAddrString((InetAddress) any);
+                minTimes = 0;
+                result = "2408:400a:5a:ea00:2fb5:112e:39dd:9bba%eth0";
+            }
+        };
+    }
+
+    @Test
+    public void testGetIpByLocalAddr() {
+        String ip = FrontendOptions.getIpByLocalAddr(null);
+        Assert.assertEquals("2408:400a:5a:ea00:2fb5:112e:39dd:9bba", ip);
+    }
+}