leonardBang commented on code in PR #3860:
URL: https://github.com/apache/flink-cdc/pull/3860#discussion_r1915948137


##########
flink-cdc-connect/flink-cdc-pipeline-connectors/flink-cdc-pipeline-connector-elasticsearch/src/test/java/org/apache/flink/cdc/connectors/elasticsearch/sink/Elasticsearch7DataSinkITCaseTest.java:
##########
@@ -137,7 +137,7 @@ public void testElasticsearchInsertAndDelete() throws 
Exception {
     @Test
     public void testElasticsearchAddColumn() throws Exception {
         TableId tableId = TableId.tableId("default", "schema", "table");
-        List<Event> events = 
ElasticsearchTestUtils.createTestEventsWithAddColumn(tableId); // 使用工具类

Review Comment:
   could you help check all Chinese note?



##########
flink-cdc-cli/src/test/resources/log4j2-test.properties:
##########
@@ -13,7 +13,7 @@
 
 # Set root logger level to OFF to not flood build logs
 # set manually to INFO for debugging purposes
-rootLogger.level = INFO
+rootLogger.level = OFF

Review Comment:
   How about changing the level to ERROR so that we can see some exception 
message in log?



##########
flink-cdc-runtime/src/test/java/org/apache/flink/cdc/runtime/serializer/SerializerTestBase.java:
##########
@@ -265,8 +264,7 @@ void testSerializeIndividually() {
                 assertTrue("Trailing data available after deserialization.", 
in.available() == 0);
             }
         } catch (Exception e) {
-            System.err.println(e.getMessage());

Review Comment:
   Could you check all system output? We should use LOGGER instead of System 
output.
    



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