canal 常见问题_canal出错

https://blog.csdn.net/rainzqb/article/details/90408421

https://www.cnblogs.com/jice/p/11987909.html

16. 常见错误(https://www.cnblogs.com/shaozhiqi/p/11534658.html)

1. 服务端：com.alibaba.otter.canal.parse.exception.CanalParseException: can't find start position for example
   是由于你改了配置文件，导致meta.dat 中保存的位点信息和数据库的位点信息不一致；导致canal抓取不到数据库的动作；
   解决方法：删除meta.dat删除，再重启canal，问题解决；
2. 客户端：java.lang.OutOfMemoryError: Java heap space
   canal消费端挂了太久，在zk对应conf下节点的
   /otter/canal/destinations/test_db/1001/cursor 位点信息是很早以前，导致重启canal时，从很早以前的位点开始消费，导致canal服务器内存爆掉
3. 服务端ERROR c.a.otter.canal.server.netty.handler.SessionHandler - something goes wrong with channel:[id: 0x0191aafd, /192.168.10.68:49502 => /192.168.10.68:11111], exception=java.io.IOException:
   当客户端停掉后，canal服务端会报此异常
   客户端：com.alibaba.otter.canal.protocol.exception.CanalClientException: something goes wrong with reason: something goes wrong with channel:[id: 0x01311037, /192.168.10.68:52086 => /192.168.10.68:11111], exception=com.alibaba.otter.canal.server.exception.CanalServerException: destination:example should start first
   当服务端停掉或者重启中，客户端连不上就会抛出此异常。场景修改了服务点的配置文件此时服务端会重启，客户端就会报次异常

CanalParseException: parse row data failed。CanalParseException: column size is not match for table:

https://blog.csdn.net/weixin_40126236/article/details/103928950

canal问题排查

https://blog.csdn.net/my201110lc/article/details/77885720

Canal重启问题

https://blog.csdn.net/qq_30228707/article/details/104824888

https://blog.csdn.net/Robin_hc/article/details/90600281