zck573693104 commented on a change in pull request #14531:
URL: https://github.com/apache/flink/pull/14531#discussion_r550393172



##########
File path: 
flink-connectors/flink-connector-kafka/src/main/java/org/apache/flink/connector/kafka/source/KafkaSourceBuilder.java
##########
@@ -458,6 +458,29 @@ private boolean maybeOverride(String key, String value, 
boolean override) {
         return overridden;
     }
 
+    private boolean maybeOverridePartitionDiscovery(String key, String value, 
boolean override) {
+        boolean overridden = false;
+        String userValue = props.getProperty(key);
+        if (override) {
+            LOG.warn(
+                    String.format(
+                            "Property %s is provided but will be overridden 
from %s to %s",
+                            key, userValue, value));
+            props.setProperty(key, value);
+            overridden = true;
+        } else {
+            if (userValue != null) {
+

Review comment:
        Imitate another method  maybeoverride . set a default value




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