使用：confluent-5.1.0
接收器配置：

curl -X POST \
  http://localhost:8083/connectors \
  -H 'cache-control: no-cache' \
  -H 'content-type: application/json' \
  -d '{
  "name": "dbz-sink-connector-1",
  "config": {
    "connector.class": "io.confluent.connect.elasticsearch.ElasticsearchSinkConnector",
    "type.name": "dbauditt4",
    "topic.index.map": "our3.platform.business:plat_index",
    "topics.regex":"our3.platform.business",
    "key.ignore": "true",
    "connection.url": "http://localhost:9200",
    "group.id":"plot",
    "key.converter":"org.apache.kafka.connect.json.JsonConverter",
    "value.converter":"org.apache.kafka.connect.json.JsonConverter",
    "key.converter.schemas.enable":"false",
    "value.converter.schemas.enable":"false",
    "transforms": "timestamp_convertor",
    "transforms.timestamp_convertor.type": "org.apache.kafka.connect.transforms.TimestampConverter$Value",
    "transforms.timestamp_convertor.target.type": "string",
    "transforms.timestamp_convertor.format": "yyyy-MM-dd HH:mm:ss.SSSSSS",
    "transforms.timestamp_convertor.field":"data.ts_ms"
  }
}';

Kafka主题中的示例消息是：

{
  "data": {
    "before": null,
    "after": {
      "Id": 331458,
      "business_id": 532334,
      "sms_opted": 1
    },
    "source": {
      "version": "0.7.5",
      "name": "our3",
      "server_id": 810143323,
      "ts_sec": 1548661255,
      "gtid": null,
      "file": "mysql-bin-changelog.001786",
      "pos": 1719980,
      "row": 0,
      "snapshot": false,
      "thread": 11674162,
      "db": "platform",
      "table": "business"
    },
    "op": "c",
    "ts_ms": 1548661255851
  }
}

连接器正在引发空指针异常。
java.lang.thread.run（线程。java:748)原因：org.apache.kafka.connect.transforms.timestampconverter.infertimestamptype（timestampconverter）上的java.lang.nullpointerexception。java:422)在
有人能帮帮我吗。我做错什么了？