我正在尝试使用SMT函数添加密钥以将其用作ES文档的文档ID，但它无法正常工作。我正在使用汇合es连接器。下面的配置文件： 的 connect-standalone.properties
bootstrap.servers=localhost:9092
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
internal.key.converter=org.apache.kafka.connect.json.JsonConverter
internal.value.converter=org.apache.kafka.connect.json.JsonConverter
internal.key.converter.schemas.enable=false
internal.value.converter.schemas.enable=false
offset.storage.file.filename=/tmp/connect.offsets
offset.flush.interval.ms=10000
连接器配置：
#Connector name
name=logs-=false
#Connector class
connector.class=io.confluent.connect.elasticsearch.ElasticsearchSinkConnector
tasks.max=1
topics=test
topic.index.map=test:activity
connection.url=http://localhost:9200
type.name=Activity
#ignore key and schema
key.ignore=false
schema.ignore=true
transforms=InsertKey,ExtractId
transforms.InsertKey.type=org.apache.kafka.connect.transforms.ValueToKey
transforms.InsertKey.fields=recordId
transforms.ExtractId.type=org.apache.kafka.connect.transforms.ExtractField$Key
transforms.ExtractId.field=recordId
我发送以下信息给kafka：
{"recordId":"999","activity":"test","description":"test Cont"}
在接收器连接器中出现此错误：
org.apache.kafka.connect.errors.ConnectException: Key is used as document id and can not be null.
at io.confluent.connect.elasticsearch.DataConverter.convertKey(DataConverter.java:56)
at io.confluent.connect.elasticsearch.DataConverter.convertRecord(DataConverter.java:86)
at io.confluent.connect.elasticsearch.ElasticsearchWriter.write(ElasticsearchWriter.java:210)
at io.confluent.connect.elasticsearch.ElasticsearchSinkTask.put(ElasticsearchSinkTask.java:119)
at org.apache.kafka.connect.runtime.WorkerSinkTask.deliverMessages(WorkerSinkTask.java:384)
at org.apache.kafka.connect.runtime.WorkerSinkTask.poll(WorkerSinkTask.java:240)
at org.apache.kafka.connect.runtime.WorkerSinkTask.iteration(WorkerSinkTask.java:172)
at org.apache.kafka.connect.runtime.WorkerSinkTask.execute(WorkerSinkTask.java:143)
at org.apache.kafka.connect.runtime.WorkerTask.doRun(WorkerTask.java:140)
at org.apache.kafka.connect.runtime.WorkerTask.run(WorkerTask.java:175)
at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
at java.util.concurrent.FutureTask.run(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
[2017-10-15 01:37:41,789] ERROR Task is being killed and will not recover until manually restarted (org.apache.kafka.connect.runtime.WorkerSinkTask:405)
[2017-10-15 01:37:41,789] INFO WorkerSinkTask{id=logs-=false-0} Committing offsets (org.apache.kafka.connect.runtime.WorkerSinkTask:262)
[2017-10-15 01:37:41,804] ERROR Task logs-=false-0 threw an uncaught and unrecoverable exception (org.apache.kafka.connect.runtime.WorkerTask:142)
org.apache.kafka.connect.errors.ConnectException: Exiting WorkerSinkTask due to unrecoverable exception.
at org.apache.kafka.connect.runtime.WorkerSinkTask.deliverMessages(WorkerSinkTask.java:406)
at org.apache.kafka.connect.runtime.WorkerSinkTask.poll(WorkerSinkTask.java:240)
at org.apache.kafka.connect.runtime.WorkerSinkTask.iteration(WorkerSinkTask.java:172)
at org.apache.kafka.connect.runtime.WorkerSinkTask.execute(WorkerSinkTask.java:143)
at org.apache.kafka.connect.runtime.WorkerTask.doRun(WorkerTask.java:140)
at org.apache.kafka.connect.runtime.WorkerTask.run(WorkerTask.java:175)
at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
at java.util.concurrent.FutureTask.run(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
请建议！一直试图修复它已经有一段时间了。非常感谢任何帮助...提前致谢