[FLINK-16628] Complex JSON sink into kafka error

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Duplicate
• Affects Version/s: 1.10.0
• Component/s: Table SQL / Client
• Assignee: Jark Wu
• Reporter: jackray wang
• Created: 17/Mar/20 06:43
• Updated: 17/Mar/20 11:41
• Resolved: 17/Mar/20 10:19

Description

// the kafka data

{"svt":"2020-02-24T12:58:09.209+0800"，"ops":{"id":"281708d0-4092-4c21-9233-931950b6eccf"}}

 

//source table

CREATE TABLE source_kafka_sasl (
    svt STRING,
    ops ROW<id STRING>
) WITH ()

//sink table

CREATE TABLE sink_kafka_sasl (
    svt STRING,
    ops ROW<id STRING>
) WITH (）

// operating
insert into sink_kafka_sasl
select svt,ops from source_kafka_sasl

Caused by: java.lang.RuntimeException: Could not serialize row '2020-02-24T12:58:09.209+0800,281708d0-4092-4c21-9233-931950b6eccf'. Make sure that the schema matches the input.
	at org.apache.flink.formats.json.JsonRowSerializationSchema.serialize(JsonRowSerializationSchema.java:141)
	at org.apache.flink.formats.json.JsonRowSerializationSchema.serialize(JsonRowSerializationSchema.java:68)
	at org.apache.flink.streaming.connectors.kafka.internals.KeyedSerializationSchemaWrapper.serializeValue(KeyedSerializationSchemaWrapper.java:47)
	at org.apache.flink.streaming.connectors.kafka.FlinkKafkaProducer.invoke(FlinkKafkaProducer.java:771)
	at org.apache.flink.streaming.connectors.kafka.FlinkKafkaProducer.invoke(FlinkKafkaProducer.java:98)
	at org.apache.flink.streaming.api.functions.sink.TwoPhaseCommitSinkFunction.invoke(TwoPhaseCommitSinkFunction.java:235)
	at org.apache.flink.streaming.api.operators.StreamSink.processElement(StreamSink.java:56)
	at org.apache.flink.streaming.runtime.tasks.OperatorChain$CopyingChainingOutput.pushToOperator(OperatorChain.java:641)
	at org.apache.flink.streaming.runtime.tasks.OperatorChain$CopyingChainingOutput.collect(OperatorChain.java:616)
	at org.apache.flink.streaming.runtime.tasks.OperatorChain$CopyingChainingOutput.collect(OperatorChain.java:596)
	at org.apache.flink.streaming.api.operators.AbstractStreamOperator$CountingOutput.collect(AbstractStreamOperator.java:730)
	at org.apache.flink.streaming.api.operators.AbstractStreamOperator$CountingOutput.collect(AbstractStreamOperator.java:708)
	at SinkConversion$3.processElement(Unknown Source)
	at org.apache.flink.streaming.runtime.tasks.OperatorChain$CopyingChainingOutput.pushToOperator(OperatorChain.java:641)
	at org.apache.flink.streaming.runtime.tasks.OperatorChain$CopyingChainingOutput.collect(OperatorChain.java:616)
	at org.apache.flink.streaming.runtime.tasks.OperatorChain$CopyingChainingOutput.collect(OperatorChain.java:596)
	at org.apache.flink.streaming.api.operators.AbstractStreamOperator$CountingOutput.collect(AbstractStreamOperator.java:730)
	at org.apache.flink.streaming.api.operators.AbstractStreamOperator$CountingOutput.collect(AbstractStreamOperator.java:708)
	at SourceConversion$1.processElement(Unknown Source)
	at org.apache.flink.streaming.runtime.tasks.OperatorChain$CopyingChainingOutput.pushToOperator(OperatorChain.java:641)
	at org.apache.flink.streaming.runtime.tasks.OperatorChain$CopyingChainingOutput.collect(OperatorChain.java:616)
	at org.apache.flink.streaming.runtime.tasks.OperatorChain$CopyingChainingOutput.collect(OperatorChain.java:596)
	at org.apache.flink.streaming.api.operators.AbstractStreamOperator$CountingOutput.collect(AbstractStreamOperator.java:730)
	at org.apache.flink.streaming.api.operators.AbstractStreamOperator$CountingOutput.collect(AbstractStreamOperator.java:708)
	at org.apache.flink.streaming.api.operators.StreamSourceContexts$ManualWatermarkContext.processAndCollectWithTimestamp(StreamSourceContexts.java:310)
	at org.apache.flink.streaming.api.operators.StreamSourceContexts$WatermarkContext.collectWithTimestamp(StreamSourceContexts.java:409)
	at org.apache.flink.streaming.connectors.kafka.internals.AbstractFetcher.emitRecordWithTimestamp(AbstractFetcher.java:398)
	at org.apache.flink.streaming.connectors.kafka.internal.KafkaFetcher.emitRecord(KafkaFetcher.java:185)
	at org.apache.flink.streaming.connectors.kafka.internal.KafkaFetcher.runFetchLoop(KafkaFetcher.java:150)
	at org.apache.flink.streaming.connectors.kafka.FlinkKafkaConsumerBase.run(FlinkKafkaConsumerBase.java:715)
	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$LegacySourceFunctionThread.run(SourceStreamTask.java:196)
Caused by: java.lang.ClassCastException: org.apache.flink.shaded.jackson2.com.fasterxml.jackson.databind.node.NullNode cannot be cast to org.apache.flink.shaded.jackson2.com.fasterxml.jackson.databind.node.ObjectNode
	at org.apache.flink.formats.json.JsonRowSerializationSchema.lambda$assembleRowConverter$dd344700$1(JsonRowSerializationSchema.java:337)
	at org.apache.flink.formats.json.JsonRowSerializationSchema.lambda$wrapIntoNullableConverter$1fa09b5b$1(JsonRowSerializationSchema.java:189)
	at org.apache.flink.formats.json.JsonRowSerializationSchema.lambda$assembleRowConverter$dd344700$1(JsonRowSerializationSchema.java:345)
	at org.apache.flink.formats.json.JsonRowSerializationSchema.lambda$wrapIntoNullableConverter$1fa09b5b$1(JsonRowSerializationSchema.java:189)
	at org.apache.flink.formats.json.JsonRowSerializationSchema.serialize(JsonRowSerializationSchema.java:138)
	... 32 more

 

 

how can i sink a json like {"svt":"2020-02-24T12:58:09.209+0800"，"ops":{"id":"281708d0-4092-4c21-9233-931950b6eccf"}} into kafka？

 

Issue Links

• is duplicated by: FLINK-16220 JsonRowSerializationSchema throws cast exception : NullNode cannot be cast to ArrayNode