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Posted to issues@flink.apache.org by GitBox <gi...@apache.org> on 2020/11/10 07:29:10 UTC
[GitHub] [flink] wangxlong commented on a change in pull request #13972: [FLINK-19912][json] Fix JSON format fails to serialize map value with…
wangxlong commented on a change in pull request #13972:
URL: https://github.com/apache/flink/pull/13972#discussion_r520344156
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File path: flink-formats/flink-json/src/main/java/org/apache/flink/formats/json/RowDataToJsonConverters.java
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@@ -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:
done~
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