wuchong commented on a change in pull request #13972:
URL: https://github.com/apache/flink/pull/13972#discussion_r520336181
##########
File path:
flink-formats/flink-json/src/main/java/org/apache/flink/formats/json/RowDataToJsonConverters.java
##########
@@ -272,8 +271,10 @@ private RowDataToJsonConverter createMapConverter(
case DROP:
continue;
case FAIL:
- throw new
RuntimeException("Map key is null, please have a check."
- + " You can
setup null key handling mode to drop entry or replace with a no-null literal.");
+ throw new
RuntimeException(String.format(
+ "JSON format
doesn't support to serialize map data with null keys. "
+ + "You
can drop null key entries or encode null in literals by specifying %s option.",
+
JsonOptions.MAP_NULL_KEY_LITERAL.key()));
Review comment:
Sorry, it should be `MAP_NULL_KEY_MODE` option.
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