Translate IPv4 to IPv6 to fix issue #1843

Change-Id: I1e04122d9e0cd7cd5986e9b33b0fad74d22c1937

hugegraph-cassandra/src/main/java/com/baidu/hugegraph/backend/store/cassandra/CassandraMetrics.java

@@ -21,6 +21,8 @@
 
 import java.io.IOException;
 import java.lang.management.MemoryUsage;
+import java.net.Inet4Address;
+import java.net.Inet6Address;
 import java.net.InetAddress;
 import java.util.Collections;
 import java.util.List;
@@ -297,7 +299,15 @@ private Map<String, Object> executeAllHosts(Function<String, Object> func) {
         Map<String, Object> hostsResults = InsertionOrderUtil.newMap();
         for (Host host : hosts) {
             InetAddress address = host.getAddress();
-            String hostAddress = address.getHostAddress();
+            String hostAddress;
+            if (address instanceof Inet4Address) {
+                hostAddress = host.getAddress().getHostAddress();
+                // Translate IPv4 to IPv6 to fix issue #1843
+                hostAddress = "::FFFF:" + hostAddress;
+            } else {
+                assert address instanceof Inet6Address;
+                hostAddress = host.getAddress().getHostAddress();
+            }
             hostsResults.put(hostAddress, func.apply(hostAddress));
         }
         results.put(SERVERS, hostsResults);