org.springframework.messaging.converter.MessageConversionException - spring-boot

Question

Using Avro message format.
Getting Below Exception. It is not able to map to AvroPlanCompleteTrigger java object after de-serilization. Can someone please help?
Bean [com.wom.repl.odr.receiver.Receiver#606b1c65]; nested exception is org.springframework.messaging.converter.MessageConversionException: Cannot handle message; nested exception is org.springframework.messaging.converter.MessageConversionException: Cannot convert from [com.wom.repl.odr.dto.AvroPlanCompleteTrigger] to [com.wom.repl.odr.dto.AvroPlanCompleteTrigger] for GenericMessage [payload={"groupId": 609001, "runUUID": "runuuid", "wmtItemNumber": "123456", "sourceLocation": 987, "retryCount": 3, "applicationName": "Jenkins"}, headers={kafka_offset=0, kafka_receivedMessageKey=null, kafka_receivedPartitionId=0, kafka_receivedTopic=test3, kafka_acknowledgment=Acknowledgment for ConsumerRecord(topic = test3, partition = 0, offset = 0, CreateTime = 1574768943315, checksum = 2886880703, serialized key size = -1, serialized value size = 29, key = null, value = {"groupId": 1234, "runUUID": "runuuid", "wmtItemNumber": "123456", "sourceLocation": 987, "retryCount": 3, "applicationName": "Jenkins"})}], failedMessage=GenericMessage [payload={"groupId": 1234, "runUUID": "runuuid", "wmtItemNumber": "123456", "sourceLocation": 987, "retryCount": 3, "applicationName": "Jenkins"}, headers={kafka_offset=0, kafka_receivedMessageKey=null, kafka_receivedPartitionId=0, kafka_receivedTopic=test3, kafka_acknowledgment=Acknowledgment for ConsumerRecord(topic = test3, partition = 0, offset = 0, CreateTime = 1574768943315, checksum = 2886880703, serialized key size = -1, serialized value size = 29, key = null, value = {"groupId": 609001, "runUUID": "runuuid", "wmtItemNumber": "123456", "sourceLocation": 987, "retryCount": 3, "applicationName": "Jenkins"})}], at org.springframework.kafka.listener.adapter.MessagingMessageListenerAdapter.invokeHandler(MessagingMessageListenerAdapter.java:178), at org.springframework.kafka.listener.adapter.RecordMessagingMessageListenerAdapter.onMessage(RecordMessagingMessageListenerAdapter.java:72), at org.springframework.kafka.listener.adapter.RecordMessagingMessageListenerAdapter.onMessage(RecordMessagingMessageListenerAdapter.java:47), at org.springframework.kafka.listener.KafkaMessageListenerContainer$ListenerConsumer.invokeRecordListener(KafkaMessageListenerContainer.java:794), at org.springframework.kafka.listener.KafkaMessageListenerContainer$ListenerConsumer.invokeListener(KafkaMessageListenerContainer.java:738), at org.springframework.kafka.listener.KafkaMessageListenerContainer$ListenerConsumer.access$2200(KafkaMessageListenerContainer.java:245), at org.springframework.kafka.listener.KafkaMessageListenerContainer$ListenerConsumer$ListenerInvoker.run(KafkaMessageListenerContainer.java:1031), at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511), at java.util.concurrent.FutureTask.run(FutureTask.java:266), at java.lang.Thread.run(Thread.java:748)] :END
Pom dependencies version:
<dependency>
<groupId>org.springframework.kafka</groupId>
<artifactId>spring-kafka</artifactId>
<version>1.2.2.RELEASE</version>
</dependency>
<dependency>
<groupId>org.apache.avro</groupId>
<artifactId>avro</artifactId>
<version>1.9.1</version>
<exclusions>
<exclusion>
<artifactId>slf4j-api</artifactId>
<groupId>org.slf4j</groupId>
</exclusion>
</exclusions>
</dependency>
AvroDeserializer method below which I am using to get AvroPlanCompleteTrigger this java object.
public T deserialize(String topic, byte[] data) {
try {
T result = null;
if (data != null) {
LOGGER.debug("data='{}'", DatatypeConverter.printHexBinary(data));
DatumReader<GenericRecord> datumReader = new SpecificDatumReader<>(
targetType.newInstance().getSchema());
Decoder decoder = DecoderFactory.get().binaryDecoder(data, null);
result = (T) datumReader.read(null, decoder);
LOGGER.debug("deserialized data='{}'", result);
}
return result;
} catch (Exception ex) {
throw new SerializationException(
"Can't deserialize data '" + Arrays.toString(data) + "' from topic '" + topic + "'", ex);
}
}

Answer 1

It looks like you have deserialized a com.wom.replenishment.odr.dto.AvroPlanCompleteTrigger but the method parameter is a com.wom.repl.odr.dto.AvroPlanCompleteTrigger.
Spring doesn't know how to convert from one to the other.