Question

我正在通过镜头为Cassandra创建Kafka Sink Conector。我的配置是：

connector.class=com.datamountaineer.streamreactor.connect.cassandra.sink.CassandraSinkConnector
connect.cassandra.key.space=space1
connect.cassandra.contact.points=cassandra1
tasks.max=1
topics=demo-1206-enriched-clicks-v0.1
connect.cassandra.port=9042
connect.cassandra.kcql=INSERT INTO space1.CLicks_Test SELECT ClicksId from demo-1206-enriched-clicks-v0.1
name=test_cassandra

但是，我收到了这个错误：

org.apache.kafka.common.config.ConfigException: Mandatory `topics` configuration contains topics not set in connect.cassandra.kcql: Set(demo-1206-enriched-clicks-v0.1)
at com.datamountaineer.streamreactor.connect.config.Helpers$.checkInputTopics(Helpers.scala:107)
at com.datamountaineer.streamreactor.connect.cassandra.sink.CassandraSinkConnector.start(CassandraSinkConnector.scala:65)
at org.apache.kafka.connect.runtime.WorkerConnector.doStart(WorkerConnector.java:100)
at org.apache.kafka.connect.runtime.WorkerConnector.start(WorkerConnector.java:125)
at org.apache.kafka.connect.runtime.WorkerConnector.transitionTo(WorkerConnector.java:182)
at org.apache.kafka.connect.runtime.Worker.startConnector(Worker.java:210)
at org.apache.kafka.connect.runtime.distributed.DistributedHerder.startConnector(DistributedHerder.java:872)
at org.apache.kafka.connect.runtime.distributed.DistributedHerder.processConnectorConfigUpdates(DistributedHerder.java:324)
at org.apache.kafka.connect.runtime.distributed.DistributedHerder.tick(DistributedHerder.java:296)
at org.apache.kafka.connect.runtime.distributed.DistributedHerder.run(DistributedHerder.java:199)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:748)

任何想法为什么？

Answer 1

Jelena，正如已经讨论的那样，问题在于Kafka Connect框架无法在.1中解析topics=demo-1206-enriched-clicks-v0.1。应该向Kafka GitHub报告一个错误。

@Alex你看到的是 Not KSQL。我们用于所有连接器的配置SQL是KCQL（Kafka连接查询语言）。

此外，我们为Apache Kafka.called LSQL提供了等效的SQL：http://www.landoop.com/docs/lenses/

Answer 2

在https://launchpass.com/datamountaineers和KCQL上对此进行了讨论，并验证了连接器是否正确支持KCQL配置中的.字符。根本原因被确定为Kafka Connect框架中的上游问题

Kafka Sink Connector for Cassandra失败了

2 个答案: