Hi，Kale
I think you’re using correct TIMESTAMP Data type in JSON format, and this
should work properly.
But looks like you used an old version `flink-json` dependency from the log.
Could you check the version of `flink-json` is 1.11.0 ?
Best,
Leonard Xu
> 在 2020年7月14日，18:07，Manas Kale <manaskal...@gmail.com> 写道：
>
> Hi,
> I am trying to parse this JSON message:
> {"monitorId": 789, "deviceId": "abcd", "data": 144.0, "state": 2, "time_st":
> "2020-07-14 15:15:19.600000"}
> using pyFlink 1.11 DDL with this code:
> ddl_source = f"""
> CREATE TABLE {INPUT_TABLE} (
> `monitorId` STRING,
> `deviceId` STRING,
> `state` INT,
> `time_st` TIMESTAMP(3),
> WATERMARK FOR time_st AS time_st - INTERVAL '2' SECOND,
> `data` DOUBLE
> ) WITH (
> 'connector' = 'kafka',
> 'topic' = '{INPUT_TOPIC}',
> 'properties.bootstrap.servers' = '{LOCAL_KAFKA}',
> 'format' = 'json'
> )
> """
> I used [1] for the DDL format and [2] for the timestamp string format.
> However, when I run this I get the following error :
> Caused by: java.io.IOException: Failed to deserialize JSON '{"monitorId":
> 789, "deviceId": "abcd", "data": 144.0, "state": 2, "time_st": "2020-07-14
> 15:15:19.600000"}'.
> at
> org.apache.flink.formats.json.JsonRowDataDeserializationSchema.deserialize(JsonRowDataDeserializationSchema.java:126)
> at
> org.apache.flink.formats.json.JsonRowDataDeserializationSchema.deserialize(JsonRowDataDeserializationSchema.java:76)
> at
> org.apache.flink.api.common.serialization.DeserializationSchema.deserialize(DeserializationSchema.java:81)
> at
> org.apache.flink.streaming.connectors.kafka.internals.KafkaDeserializationSchemaWrapper.deserialize(KafkaDeserializationSchemaWrapper.java:56)
> at
> org.apache.flink.streaming.connectors.kafka.internal.KafkaFetcher.partitionConsumerRecordsHandler(KafkaFetcher.java:181)
> at
> org.apache.flink.streaming.connectors.kafka.internal.KafkaFetcher.runFetchLoop(KafkaFetcher.java:141)
> at
> org.apache.flink.streaming.connectors.kafka.FlinkKafkaConsumerBase.run(FlinkKafkaConsumerBase.java:755)
> at
> org.apache.flink.streaming.api.operators.StreamSource.run(StreamSource.java:100)
> at
> org.apache.flink.streaming.api.operators.StreamSource.run(StreamSource.java:63)
> at
> org.apache.flink.streaming.runtime.tasks.SourceStreamTask$LegacySourceFunctionThread.run(SourceStreamTask.java:201)
> Caused by: java.lang.NoSuchFieldError: SQL_TIMESTAMP_FORMAT
>
> I believe I am using the correct TIMESTAMP format in the JSON message
> according to the documentation so can't figure out what could be the error.
>
> Any help would be appreciated!
>
> [1]
> https://ci.apache.org/projects/flink/flink-docs-release-1.11/dev/table/streaming/time_attributes.html#defining-in-create-table-ddl-1
>
> <https://ci.apache.org/projects/flink/flink-docs-release-1.11/dev/table/streaming/time_attributes.html#defining-in-create-table-ddl-1>
> [2]
> https://ci.apache.org/projects/flink/flink-docs-release-1.11/dev/table/types.html#timestamp
>
> <https://ci.apache.org/projects/flink/flink-docs-release-1.11/dev/table/types.html#timestamp>
>
> Thanks,
> Manas
>
