[GitHub] [flink] lamber-ken commented on issue #8583: [FLINK-11820][serialization] SimpleStringSchema handle message record which value is null

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lamber-ken commented on issue #8583: [FLINK-11820][serialization] SimpleStringSchema handle message record which value is null
URL: https://github.com/apache/flink/pull/8583#issuecomment-499957988
 
 
   hi, thanks for your commnet @aljoscha. here is detail stackstrace
   ```
   Caused by: java.lang.NullPointerException
   	at java.lang.String.<init>(String.java:515)
   	at org.apache.flink.api.common.serialization.SimpleStringSchema.deserialize(SimpleStringSchema.java:75)
   	at org.apache.flink.api.common.serialization.SimpleStringSchema.deserialize(SimpleStringSchema.java:36)
   	at org.apache.flink.streaming.util.serialization.KeyedDeserializationSchemaWrapper.deserialize(KeyedDeserializationSchemaWrapper.java:44)
   	at org.apache.flink.streaming.connectors.kafka.internal.Kafka09Fetcher.runFetchLoop(Kafka09Fetcher.java:142)
   	at org.apache.flink.streaming.connectors.kafka.FlinkKafkaConsumerBase.run(FlinkKafkaConsumerBase.java:738)
   	at org.apache.flink.streaming.api.operators.StreamSource.run(StreamSource.java:94)
   	at org.apache.flink.streaming.api.operators.StreamSource.run(StreamSource.java:58)
   	at org.apache.flink.streaming.runtime.tasks.SourceStreamTask.run(SourceStreamTask.java:99)
   	at org.apache.flink.streaming.runtime.tasks.StreamTask.invoke(StreamTask.java:300)
   	at org.apache.flink.runtime.taskmanager.Task.run(Task.java:711)
   	at java.lang.Thread.run(Thread.java:748)
   ``` 

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