org.apache.kafka.common.errors.S

报错信息：

2020-03-31 20:25:07.504 ERROR 11348 --- [ntainer#0-0-C-1] o.s.kafka.listener.LoggingErrorHandler   : Error while processing: null

org.apache.kafka.common.errors.SerializationException: Error deserializing key/value for partition testJson-0 at offset 0. If needed, please seek past the record to continue consumption.
Caused by: java.lang.IllegalArgumentException: The class 'com.example.demo.entity.Message' is not in the trusted packages: [java.util, java.lang]. If you believe this class is safe to deserialize, please provide its name. If the serialization is only done by a trusted source, you can also enable trust all (*).
    at org.springframework.kafka.support.converter.DefaultJackson2JavaTypeMapper.getClassIdType(DefaultJackson2JavaTypeMapper.java:125) ~[spring-kafka-2.3.6.RELEASE.jar:2.3.6.RELEASE]
    at org.springframework.kafka.support.converter.DefaultJackson2JavaTypeMapper.toJavaType(DefaultJackson2JavaTypeMapper.java:99) ~[spring-kafka-2.3.6.RELEASE.jar:2.3.6.RELEASE]
    at org.springframework.kafka.support.serializer.JsonDeserializer.deserialize(JsonDeserializer.java:425) ~[spring-kafka-2.3.6.RELEASE.jar:2.3.6.RELEASE]
    at org.apache.kafka.clients.consumer.internals.Fetcher.parseRecord(Fetcher.java:1268) ~[kafka-clients-2.3.1.jar:na]
    at org.apache.kafka.clients.consumer.internals.Fetcher.access$3600(Fetcher.java:124) ~[kafka-clients-2.3.1.jar:na]
    at org.apache.kafka.clients.consumer.internals.Fetcher$PartitionRecords.fetchRecords(Fetcher.java:1492) ~[kafka-clients-2.3.1.jar:na]
    at org.apache.kafka.clients.consumer.internals.Fetcher$PartitionRecords.access$1600(Fetcher.java:1332) ~[kafka-clients-2.3.1.jar:na]
    at org.apache.kafka.clients.consumer.internals.Fetcher.fetchRecords(Fetcher.java:645) ~[kafka-clients-2.3.1.jar:na]
    at org.apache.kafka.clients.consumer.internals.Fetcher.fetchedRecords(Fetcher.java:606) ~[kafka-clients-2.3.1.jar:na]
    at org.apache.kafka.clients.consumer.KafkaConsumer.pollForFetches(KafkaConsumer.java:1263) ~[kafka-clients-2.3.1.jar:na]
    at org.apache.kafka.clients.consumer.KafkaConsumer.poll(KafkaConsumer.java:1225) ~[kafka-clients-2.3.1.jar:na]
    at org.apache.kafka.clients.consumer.KafkaConsumer.poll(KafkaConsumer.java:1201) ~[kafka-clients-2.3.1.jar:na]
    at org.springframework.kafka.listener.KafkaMessageListenerContainer$ListenerConsumer.doPoll(KafkaMessageListenerContainer.java:1034) ~[spring-kafka-2.3.6.RELEASE.jar:2.3.6.RELEASE]
    at org.springframework.kafka.listener.KafkaMessageListenerContainer$ListenerConsumer.pollAndInvoke(KafkaMessageListenerContainer.java:990) ~[spring-kafka-2.3.6.RELEASE.jar:2.3.6.RELEASE]
    at org.springframework.kafka.listener.KafkaMessageListenerContainer$ListenerConsumer.run(KafkaMessageListenerContainer.java:927) ~[spring-kafka-2.3.6.RELEASE.jar:2.3.6.RELEASE]
    at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:515) ~[na:na]
    at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264) ~[na:na]
    at java.base/java.lang.Thread.run(Thread.java:834) ~[na:na]

如果kafka consumer使用的JsonDeserializer，需要配置 trusted.packages，*是所有，也可以配置上你消息对象所在的具体的包。

consumer:
  group-id: test
  auto-offset-reset: earliest
  value-deserializer: org.springframework.kafka.support.serializer.JsonDeserializer
  properties:
    spring:
      json:
        trusted:
          packages: "*"

如果使用的configuration方式配置的kafka consumer：

jsonDeserializer.addTrustedPackages("*");