我正在尝试使用 Debezium 将托管在 Amazon RDS 中的 Postgres SQL 数据库与 Kafka 主题连接起来。
我正在遵循以下教程：
http://debezium.io/docs/tutorial/
我的 kafka 和 kafka connect 服务启动正常，kafka connect 服务也可以在/usr/share/java dir 中获取我的 debezium postgres 连接器 jar。
但是，在尝试使用以下 curl 命令通过 kafka connect API 附加 postgres config json 时：
curl -i -X POST -H "Accept:application/json" -H "Content-Type:application/json" localhost:8083/connectors/ -d @connector1.json
我最终收到以下错误：
[2018-06-13 23:45:44,749] ERROR Uncaught exception in REST call to /connectors/ (org.apache.kafka.connect.runtime.rest.errors.ConnectExceptionMapper:61)
org.apache.kafka.connect.errors.ConnectException: Could not intialize type registry
at io.debezium.connector.postgresql.connection.PostgresConnection.<init>(PostgresConnection.java:68)
at io.debezium.connector.postgresql.PostgresConnector.validate(PostgresConnector.java:95)
at org.apache.kafka.connect.runtime.AbstractHerder.validateConnectorConfig(AbstractHerder.java:277)
at org.apache.kafka.connect.runtime.distributed.DistributedHerder$6.call(DistributedHerder.java:534)
at org.apache.kafka.connect.runtime.distributed.DistributedHerder$6.call(DistributedHerder.java:531)
at org.apache.kafka.connect.runtime.distributed.DistributedHerder.tick(DistributedHerder.java:267)
at org.apache.kafka.connect.runtime.distributed.DistributedHerder.run(DistributedHerder.java:216)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748)
Caused by: org.postgresql.util.PSQLException: The connection attempt failed.
at org.postgresql.core.v3.ConnectionFactoryImpl.openConnectionImpl(ConnectionFactoryImpl.java:275)
at org.postgresql.core.ConnectionFactory.openConnection(ConnectionFactory.java:49)
at org.postgresql.jdbc.PgConnection.<init>(PgConnection.java:194)
at org.postgresql.Driver.makeConnection(Driver.java:431)
at org.postgresql.Driver.connect(Driver.java:247)
at io.debezium.jdbc.JdbcConnection.lambda$patternBasedFactory$1(JdbcConnection.java:161)
at io.debezium.jdbc.JdbcConnection.connection(JdbcConnection.java:585)
at io.debezium.connector.postgresql.connection.PostgresConnection.<init>(PostgresConnection.java:65)
... 11 more
Caused by: java.net.SocketTimeoutException: connect timed out
at java.net.PlainSocketImpl.socketConnect(Native Method)
at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
at java.net.Socket.connect(Socket.java:589)
at org.postgresql.core.PGStream.<init>(PGStream.java:62)
at org.postgresql.core.v3.ConnectionFactoryImpl.openConnectionImpl(ConnectionFactoryImpl.java:144)
... 18 more
请一些人就例外以及如何解决它提出建议吗？
这里是否缺少我可能缺少的属性/配置？
您是否将 postgres 数据库端口配置为可从外部访问？ IIRC RDS 数据库使用 SSL 进行连接，因此可能还需要在 postgres 连接器中配置 SSL。