融合的Kafka连接ElasticSearch ID文档创建

Question

I'm using the kafka connect elasticsearch connector to write data from a topic to an ElasticSearch index. Both the key and value of the topic messages are in json format. The connector is not able to start because of the following error:

    org.apache.kafka.connect.errors.DataException: MAP is not supported as the document id.

Following is the format of my messages (key | value):

    {"key":"OKOK","start":1517241690000,"end":1517241695000}     |   {"measurement":"responses","count":9,"sum":1350.0,"max":150.0,"min":150.0,"avg":150.0} 

And following is the body of the POST request I'm using to create the connector:

{
 "name": "elasticsearch-sink-connector",
 "config": {
 "connector.class":"io.confluent.connect.elasticsearch.ElasticsearchSinkConnector",
 "tasks.max": "1",
 "topics": "output-topic-elastic",
 "connection.url": "http://elasticsearch:9200",
 "type.name": "aggregator",
 "schemas.enable": "false",
 "topic.schema.ignore": "true",
 "topic.key.ignore": "false",
 "value.converter": "org.apache.kafka.connect.json.JsonConverter",
 "value.converter.schemas.enable": "false", 
 "key.converter": "org.apache.kafka.connect.json.JsonConverter",
 "key.converter.schemas.enable": "false", 
 "key.ignore":"false",
 "topic.index.map": "output-topic-elastic:aggregator",
 "name": "elasticsearch-sink",
 "transforms": "InsertKey",
"transforms.InsertKey.type":"org.apache.kafka.connect.transforms.ValueToKey",
"transforms.InsertKey.fields":"key"
}}

Any help would be really appreciated. I've found out a similar question on stackoverflow 1 but I've got no luck with the answers.

ES document ID creation

Answer 1

You also need ExtractField in there

"transforms": "InsertKey,extractKey",
"transforms.InsertKey.type":"org.apache.kafka.connect.transforms.ValueToKey",
"transforms.InsertKey.fields":"key",
"transforms.extractKey.type":"org.apache.kafka.connect.transforms.ExtractField$Key",
"transforms.extractKey.field":"key"

Check out this post for more details.