Avro 地图类型错误 - 架构中的路径：--> org.apache.avro.generic.GenericData.getDefaultValue(GenericData.java:1175) 上的事件 [关闭]

Question

我有以下 Avro 架构定义。但是在运行应用程序时出现错误。我已经设置了值但仍然得到问题可能在哪里？

{
 "type": "record",
 "name": "ContractEvent,
 "namespace": "com.company.pkg",
 "fields": [
     {
      "name": "factoryId",
      "type": "string"
    },
    {
      "name": "factoryData",
      "type": [
        "null",
        {
          "type": "map",
          "values": "string"
        }
      ],
      "default": null
    },
    { // more types here..
    }

这就是我在 Kotlin 中设置值的方式。

fun buildFactory(): Factory {
        val map = mutableMapOf<String, String>()                        
        map["1"] = "factory"   

        FactoryEvent.newBuilder()  
    // .setFactoryData(mapOf("1" to "factory"))  //  1st way I tried but error.    
       .setFactoryData(map) // this is how 2nd way. set a map created separately, but error
       .build() 
 }
                 

                

=== 堆栈跟踪

Exception in thread "DefaultDispatcher-worker-1" Path in schema: --> event
at org.apache.avro.generic.GenericData.getDefaultValue(GenericData.java:1175)
at org.apache.avro.data.RecordBuilderBase.defaultValue(RecordBuilderBase.java:138)