bravekong opened a new issue, #3214:
URL: https://github.com/apache/incubator-seatunnel/issues/3214

   ### Search before asking
   
   - [X] I had searched in the 
[issues](https://github.com/apache/incubator-seatunnel/issues?q=is%3Aissue+label%3A%22bug%22)
 and found no similar issues.
   
   
   ### What happened
   
   When I configure the schema parameter as json, an error is 
reported:java.lang.ClassCastException: 
com.fasterxml.jackson.databind.node.ArrayNode cannot be cast to 
com.fasterxml.jackson.databind.node.ObjectNode
   
   
   ### SeaTunnel Version
   
   2.1.3-release
   
   ### SeaTunnel Config
   
   ```conf
   #test_flink_kafka.conf
   env {
        execution.parallelism = 1
   }
   source {
        KafkaTableStream {
                consumer.bootstrap.servers = "127.0.0.1:9092"
                consumer.group.id = "console-consumer"
                topics = hudi-topic
                result_table_name = test
                format.type = json
                schema = "{\"name\":\"string\",\"age\":\"int\"}"
        }
   }
   transform {}
   sink {
        ConsoleSink {}
   }
   ```
   
   
   ### Running Command
   
   ```shell
   bin/start-seatunnel-flink.sh --config config/test_flink_kafka.conf
   ```
   
   
   ### Error Exception
   
   ```log
   The program finished with the following exception:
   
   org.apache.flink.client.program.ProgramInvocationException: The main method 
caused an error: Execute Flink task error
        at 
org.apache.flink.client.program.PackagedProgram.callMainMethod(PackagedProgram.java:372)
        at 
org.apache.flink.client.program.PackagedProgram.invokeInteractiveModeForExecution(PackagedProgram.java:222)
        at 
org.apache.flink.client.ClientUtils.executeProgram(ClientUtils.java:114)
        at 
org.apache.flink.client.cli.CliFrontend.executeProgram(CliFrontend.java:812)
        at org.apache.flink.client.cli.CliFrontend.run(CliFrontend.java:246)
        at 
org.apache.flink.client.cli.CliFrontend.parseAndRun(CliFrontend.java:1054)
        at 
org.apache.flink.client.cli.CliFrontend.lambda$main$10(CliFrontend.java:1132)
        at java.security.AccessController.doPrivileged(Native Method)
        at javax.security.auth.Subject.doAs(Subject.java:422)
        at 
org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1876)
        at 
org.apache.flink.runtime.security.contexts.HadoopSecurityContext.runSecured(HadoopSecurityContext.java:41)
        at org.apache.flink.client.cli.CliFrontend.main(CliFrontend.java:1132)
   Caused by: org.apache.seatunnel.core.base.exception.CommandExecuteException: 
Execute Flink task error
        at 
org.apache.seatunnel.core.flink.command.FlinkApiTaskExecuteCommand.execute(FlinkApiTaskExecuteCommand.java:85)
        at org.apache.seatunnel.core.base.Seatunnel.run(Seatunnel.java:40)
        at 
org.apache.seatunnel.core.flink.SeatunnelFlink.main(SeatunnelFlink.java:34)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at 
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:498)
        at 
org.apache.flink.client.program.PackagedProgram.callMainMethod(PackagedProgram.java:355)
        ... 11 more
   Caused by: java.lang.ClassCastException: 
com.fasterxml.jackson.databind.node.ArrayNode cannot be cast to 
com.fasterxml.jackson.databind.node.ObjectNode
        at 
org.apache.seatunnel.flink.util.SchemaUtil.setSchema(SchemaUtil.java:68)
        at 
org.apache.seatunnel.flink.kafka.source.KafkaTableStream.getSchema(KafkaTableStream.java:137)
        at 
org.apache.seatunnel.flink.kafka.source.KafkaTableStream.getData(KafkaTableStream.java:128)
        at 
org.apache.seatunnel.flink.stream.FlinkStreamExecution.start(FlinkStreamExecution.java:55)
        at 
org.apache.seatunnel.core.flink.command.FlinkApiTaskExecuteCommand.execute(FlinkApiTaskExecuteCommand.java:82)
        ... 18 more
   ```
   
   
   ### Flink or Spark Version
   
   flink 1.13.6
   
   ### Java or Scala Version
   
   java 1.8
   
   ### Screenshots
   
   _No response_
   
   ### Are you willing to submit PR?
   
   - [X] Yes I am willing to submit a PR!
   
   ### Code of Conduct
   
   - [X] I agree to follow this project's [Code of 
Conduct](https://www.apache.org/foundation/policies/conduct)
   


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