错误信息：

address gdny-mall.rwlb.rds.aliyuncs.com/172.18.110.56:3306 has an error, retrying. caused by
java.io.IOException: Received error packet: errno = 1236, sqlstate = HY000 errmsg = Could not find first log file name in binary log index file
        at com.alibaba.otter.canal.parse.inbound.mysql.dbsync.DirectLogFetcher.fetch(DirectLogFetcher.java:102) ~[canal.parse-1.1.6.jar:na]
        at com.alibaba.otter.canal.parse.inbound.mysql.MysqlConnection.dump(MysqlConnection.java:237) ~[canal.parse-1.1.6.jar:na]
        at com.alibaba.otter.canal.parse.inbound.AbstractEventParser$1.run(AbstractEventParser.java:262) ~[canal.parse-1.1.6.jar:na]
        at java.lang.Thread.run(Thread.java:748) [na:1.8.0_202]

1、关闭canal服务  canal安装目录/bin/stop.sh

sh example/bin/stop.sh

2、删除上次canal服务停止时产生的meta.bat (数据消费位置文件)   

rm -rf /canal/conf/example/meta.bat

3、启动canal服务

sh /canal/bin/startup.sh