jsancio commented on code in PR #15986:
URL: https://github.com/apache/kafka/pull/15986#discussion_r1615318177


##########
raft/src/main/java/org/apache/kafka/raft/QuorumConfig.java:
##########
@@ -199,6 +206,34 @@ private static Map<Integer, InetSocketAddress> 
parseVoterConnections(
         return voterMap;
     }
 
+    public static InetSocketAddress parseBootstrapServer(String 
bootstrapServer) {
+        String host = Utils.getHost(bootstrapServer);
+        if (host == null) {
+            throw new ConfigException(
+                String.format(
+                    "Failed to parse host name from {} for the configuration 
{}. Each " +
+                    "entry should be in the form \"{host}:{port}\"",
+                    bootstrapServer,
+                    QUORUM_BOOTSTRAP_SERVERS_CONFIG
+                )
+            );
+        }
+
+        Integer port = Utils.getPort(bootstrapServer);
+        if (port == null) {
+            throw new ConfigException(
+                String.format(
+                    "Failed to parse host port from {} for the configuration 
{}. Each " +
+                    "entry should be in the form \"{host}:{port}\"",
+                    bootstrapServer,
+                    QUORUM_BOOTSTRAP_SERVERS_CONFIG
+                )
+            );
+        }
+
+        return InetSocketAddress.createUnresolved(host, port);

Review Comment:
   I am not sure. I know that it throws an `IllegalArgumentException` if host 
is `null` or port is outside the valid range. I think it is better for 
`Utils.getHost` and `Utils.getPort` to better catch invalid host and port 
values so we can throw the corresponding `ConfigException`. I filed 
https://issues.apache.org/jira/browse/KAFKA-16824 to improve the implementation 
of those methods.



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