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https://issues.apache.org/jira/browse/FLINK-27663?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Zhiwen Sun closed FLINK-27663.
------------------------------
Resolution: Not A Problem
> upsert-kafka can't process delete message from upsert-kafka sink
> ----------------------------------------------------------------
>
> Key: FLINK-27663
> URL: https://issues.apache.org/jira/browse/FLINK-27663
> Project: Flink
> Issue Type: Bug
> Components: Connectors / Kafka
> Affects Versions: 1.15.0, 1.13.6, 1.14.4
> Reporter: Zhiwen Sun
> Priority: Major
>
> upsert-kafka write DELETE data as Kafka messages with null values (indicate
> tombstone for the key).
> But when use upsert-kafka as a source table to consumer kafka messages write
> by upsert-kafka sink, DELETE messages will be ignored.
>
> related sql :
>
>
> {code:java}
> create table order_system_log(
> id bigint,
> PRIMARY KEY (id) NOT ENFORCED
> ) WITH (
> 'connector' = 'upsert-kafka',
> 'topic' = 'test_use',
> 'properties.bootstrap.servers' = 'your broker',
> 'properties.group.id' = 'your group id',
> 'value.json.fail-on-missing-field' = 'false',
> 'value.json.ignore-parse-errors' = 'true',
> 'key.json.fail-on-missing-field' = 'false',
> 'key.json.ignore-parse-errors' = 'true',
> 'key.format' = 'json',
> 'value.format' = 'json'
> );
> select
> *
> from
> order_system_log
> ;
> {code}
>
>
> The problem may be produced by DeserializationSchema#deserialize,
> this method does not collect data while subclass's deserialize return null.
>
>
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