linlinnn opened a new issue #10393:
URL: https://github.com/apache/pulsar/issues/10393
Related #10377
**Is your enhancement request related to a problem? Please describe.**
Struct schema(AvroSchema/JSONSchema) cannot decode without default
constructor.
Reproduce code
```
@Data
@AllArgsConstructor
public static class Payload {
String message;
}
public static void main(String[] args) {
AvroSchema<Payload> schema = AvroSchema.of(Payload.class);
Payload payload = new Payload("test");
byte[] encode = schema.encode(payload);
schema.decode(encode);
}
```
Exception stack
```
Exception in thread "main" java.lang.RuntimeException:
java.lang.RuntimeException: java.lang.NoSuchMethodException:
org.apache.pulsar.client.impl.schema.JSONSchema$Payload.<init>()
at
org.apache.avro.specific.SpecificData.newInstance(SpecificData.java:466)
at
org.apache.avro.specific.SpecificData.newRecord(SpecificData.java:484)
at org.apache.avro.reflect.ReflectData.newRecord(ReflectData.java:1038)
at
org.apache.avro.generic.GenericDatumReader.readRecord(GenericDatumReader.java:236)
at
org.apache.avro.specific.SpecificDatumReader.readRecord(SpecificDatumReader.java:123)
at
org.apache.avro.generic.GenericDatumReader.readWithoutConversion(GenericDatumReader.java:179)
at
org.apache.avro.generic.GenericDatumReader.read(GenericDatumReader.java:160)
at
org.apache.avro.generic.GenericDatumReader.read(GenericDatumReader.java:153)
at
org.apache.pulsar.client.impl.schema.reader.AvroReader.read(AvroReader.java:75)
at
org.apache.pulsar.client.api.schema.SchemaReader.read(SchemaReader.java:39)
at
org.apache.pulsar.client.impl.schema.reader.AbstractMultiVersionReader.read(AbstractMultiVersionReader.java:62)
at
org.apache.pulsar.client.api.schema.SchemaReader.read(SchemaReader.java:39)
at
org.apache.pulsar.client.impl.schema.AbstractStructSchema.decode(AbstractStructSchema.java:55)
at
org.apache.pulsar.client.impl.schema.JSONSchema.main(JSONSchema.java:75)
Caused by: java.lang.RuntimeException: java.lang.NoSuchMethodException:
org.apache.pulsar.client.impl.schema.JSONSchema$Payload.<init>()
at
org.apache.avro.specific.SpecificData$1.computeValue(SpecificData.java:67)
at
org.apache.avro.specific.SpecificData$1.computeValue(SpecificData.java:58)
at java.lang.ClassValue.getFromHashMap(ClassValue.java:227)
at java.lang.ClassValue.getFromBackup(ClassValue.java:209)
at java.lang.ClassValue.get(ClassValue.java:115)
at
org.apache.avro.specific.SpecificData.newInstance(SpecificData.java:463)
... 13 more
Caused by: java.lang.NoSuchMethodException:
org.apache.pulsar.client.impl.schema.JSONSchema$Payload.<init>()
at java.lang.Class.getConstructor0(Class.java:3082)
at java.lang.Class.getDeclaredConstructor(Class.java:2178)
at
org.apache.avro.specific.SpecificData$1.computeValue(SpecificData.java:63)
... 18 more
```
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