Kafka Connect JDBC sink connector issue

Question

Getting below error while running JDBC sink connector

[2020-01-08 15:05:39,271] ERROR Plugin class loader for connector: 'io.confluent.connect.jdbc.JdbcSinkConnector' was not found. Returning: org.apache.kafka.connect.runtime.isolation.DelegatingClassLoader@6f2cfcc2 (org.apache.kafka.connect.runtime.isolation.DelegatingClassLoader:165)
[2020-01-08 15:05:39,272] INFO Finished creating connector test-sink (org.apache.kafka.connect.runtime.Worker:273)
[2020-01-08 15:05:39,273] ERROR Plugin class loader for connector: 'io.confluent.connect.jdbc.JdbcSinkConnector' was not found. Returning: org.apache.kafka.connect.runtime.isolation.DelegatingClassLoader@6f2cfcc2 (org.apache.kafka.connect.runtime.isolation.DelegatingClassLoader:165)
[2020-01-08 15:05:39,273] INFO SinkConnectorConfig values:

I have set plugin path properly as per given in the documentation.

Answer 1

I had the same issue with you and just solved it. The point here is you should not copy the connector jar file to the kafka libs directory. You should set the CLASSPATH during running the command like this:

env CLASSPATH=./* connect-standalone.sh $KAFKA_HOME/config/connect-standalone.properties config/quickstart-couchbase-source.properties

or set the plugin.path in the worker .properties file.

plugin.path=/path_to_the_plugin_jar_file

Hope this help.