[jira] [Created] (FLINK-20470) MissingNode can't be casted to ObjectNode when deserializing JSON

[Shang Yuanchun (Jira)]

Jark Wu created FLINK-20470:
-------------------------------

             Summary: MissingNode can't be casted to ObjectNode when deserializing JSON
                 Key: FLINK-20470
                 URL: https://issues.apache.org/jira/browse/FLINK-20470
             Project: Flink
          Issue Type: Bug
          Components: Formats (JSON, Avro, Parquet, ORC, SequenceFile), Table SQL / Ecosystem
    Affects Versions: 1.11.2, 1.12.0
            Reporter: Jark Wu


{code}
Caused by: java.io.IOException: Failed to deserialize JSON ''.
        at
org.apache.flink.formats.json.JsonRowDataDeserializationSchema.deserialize(JsonRowDataDeserializationSchema.java:126)
~[flink-json-1.11.2.jar:1.11.2]
        at
org.apache.flink.formats.json.JsonRowDataDeserializationSchema.deserialize(JsonRowDataDeserializationSchema.java:76)
~[flink-json-1.11.2.jar:1.11.2]
        at
org.apache.flink.api.common.serialization.DeserializationSchema.deserialize(DeserializationSchema.java:81)
~[flink-dist_2.11-1.11.2.jar:1.11.2]
        at
org.apache.flink.streaming.connectors.kafka.internals.KafkaDeserializationSchemaWrapper.deserialize(KafkaDeserializationSchemaWrapper.java:56)
~[flink-sql-connector-kafka_2.11-1.11.2.jar:1.11.2]
        at
org.apache.flink.streaming.connectors.kafka.internal.KafkaFetcher.partitionConsumerRecordsHandler(KafkaFetcher.java:181)
~[flink-sql-connector-kafka_2.11-1.11.2.jar:1.11.2]
        at
org.apache.flink.streaming.connectors.kafka.internal.KafkaFetcher.runFetchLoop(KafkaFetcher.java:141)
~[flink-sql-connector-kafka_2.11-1.11.2.jar:1.11.2]
        at
org.apache.flink.streaming.connectors.kafka.FlinkKafkaConsumerBase.run(FlinkKafkaConsumerBase.java:755)
~[flink-sql-connector-kafka_2.11-1.11.2.jar:1.11.2]
        at
org.apache.flink.streaming.api.operators.StreamSource.run(StreamSource.java:100)
~[flink-dist_2.11-1.11.2.jar:1.11.2]
        at
org.apache.flink.streaming.api.operators.StreamSource.run(StreamSource.java:63)
~[flink-dist_2.11-1.11.2.jar:1.11.2]
        at
org.apache.flink.streaming.runtime.tasks.SourceStreamTask$LegacySourceFunctionThread.run(SourceStreamTask.java:213)
~[flink-dist_2.11-1.11.2.jar:1.11.2]
Caused by: java.lang.ClassCastException:
org.apache.flink.shaded.jackson2.com.fasterxml.jackson.databind.node.MissingNode
cannot be cast to
org.apache.flink.shaded.jackson2.com.fasterxml.jackson.databind.node.ObjectNode
{code}

Currently, we only check {{jsonNode == null || jsonNode.isNull()}} for nullable node, I think we should also take MissingNode into account.





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