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https://issues.apache.org/jira/browse/FLINK-10061?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16570156#comment-16570156
 ] 

ASF GitHub Bot commented on FLINK-10061:
----------------------------------------

tragicjun commented on a change in pull request #6495: [FLINK-10061] [table] 
[kafka] Fix unsupported reconfiguration in KafkaTableSink
URL: https://github.com/apache/flink/pull/6495#discussion_r207876429
 
 

 ##########
 File path: 
flink-connectors/flink-connector-kafka-base/src/main/java/org/apache/flink/streaming/connectors/kafka/KafkaTableSink.java
 ##########
 @@ -166,8 +167,17 @@ public void emitDataStream(DataStream<Row> dataStream) {
        @Override
        public KafkaTableSink configure(String[] fieldNames, 
TypeInformation<?>[] fieldTypes) {
                if (schema.isPresent()) {
-                       // a fixed schema is defined so reconfiguration is not 
supported
-                       throw new 
UnsupportedOperationException("Reconfiguration of this sink is not supported.");
+                       if (getFieldTypes().length != fieldTypes.length || 
!Arrays.deepEquals(getFieldTypes(), fieldTypes)) {
+                               String fixedFieldTypes = 
Arrays.deepToString(Arrays.stream(getFieldTypes())
+                                               .map(s -> 
s.getTypeClass().getSimpleName()).toArray());
 
 Review comment:
   The if statement uses `Arrays.deepEquals()` which is a clean way of 
comparing arrays. The `Arrays.deepToString()` is just used to build string 
representation of fieldTypes that are reflected in the exception message. 
Perhaps the code employs too many **Arrays**, please review it a bit closer :) 

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> Fix unsupported reconfiguration in KafkaTableSink
> -------------------------------------------------
>
>                 Key: FLINK-10061
>                 URL: https://issues.apache.org/jira/browse/FLINK-10061
>             Project: Flink
>          Issue Type: Bug
>          Components: Kafka Connector
>    Affects Versions: 1.6.0
>            Reporter: Jun Zhang
>            Assignee: Jun Zhang
>            Priority: Major
>              Labels: pull-request-available
>             Fix For: 1.6.1, 1.7.0
>
>
> When using KafkaTableSink in "table.writeToSink(), the following exception is 
> thrown:
> {quote} java.lang.UnsupportedOperationException: Reconfiguration of this sink 
> is not supported.
> {quote}
>  



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