[GitHub] [pulsar] sijie opened a new issue #4803: Pulsar schema doesn't support null value

[GitBox <gi...@apache.org>]

sijie opened a new issue #4803: Pulsar schema doesn't support null value
URL: https://github.com/apache/pulsar/issues/4803
 
 
   **Describe the bug**
   
   If a Pulsar producer sends messages without payload, Pulsar consumer is not able to consume the messages without payload. Because the payload passed to schema is an empty array not `null`. Hence exceptions are thrown. An example exception is shown as below:
   
   ```
   org.apache.pulsar.client.api.SchemaSerializationException: Size of data received by BooleanSchema is not 1
   
   	at org.apache.pulsar.client.impl.schema.BooleanSchema.validate(BooleanSchema.java:44)
   	at org.apache.pulsar.client.impl.schema.BooleanSchema.decode(BooleanSchema.java:62)
   	at org.apache.pulsar.client.impl.schema.BooleanSchema.decode(BooleanSchema.java:29)
   	at org.apache.pulsar.client.impl.MessageImpl.getValue(MessageImpl.java:273)
   	at org.apache.pulsar.client.impl.TopicMessageImpl.getValue(TopicMessageImpl.java:143)
   ```
   
   **To Reproduce**
   
   1. Use a typed producer to send messages without setting value.
   2. Use a typed consumer to receive messages.
   
   **Expected behavior**
   
   The typed consumer should receive messages with a `null` value.
   
   

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