Error reported by the canadian.adapter

Errors are reported as follows:

2021-09-09 15:56:33.669 [Thread-12] ERROR c.a.o.canal.adapter.launcher.loader.CanalAdapterWorker - process error!
com.alibaba.otter.canal.protocol.exception.CanalClientException: java.net.ConnectException: Connection refused
        at com.alibaba.otter.canal.client.impl.SimpleCanalConnector.doConnect(SimpleCanalConnector.java:198)
        at com.alibaba.otter.canal.client.impl.SimpleCanalConnector.connect(SimpleCanalConnector.java:115)
        at com.alibaba.otter.canal.adapter.launcher.loader.CanalAdapterWorker.process(CanalAdapterWorker.java:88)
        at java.lang.Thread.run(Thread.java:748)
Caused by: java.net.ConnectException: Connection refused
        at sun.nio.ch.Net.connect0(Native Method)
        at sun.nio.ch.Net.connect(Net.java:454)
        at sun.nio.ch.Net.connect(Net.java:446)
        at sun.nio.ch.SocketChannelImpl.connect(SocketChannelImpl.java:648)
        at com.alibaba.otter.canal.client.impl.SimpleCanalConnector.doConnect(SimpleCanalConnector.java:150)
        ... 3 common frames omitted

For this problem, you need to modify the application.yml configuration of canadian.adapter , and change the canalserverhost: address to the actual address. At first, I wrote the 127.0.0.1 address, and then the access has been rejected. After changing it to a real IP, there is often no error.