canal服务启动后连接mysql 报 java.io.IOException: socket re

mysql服务已启动，用户权限也分配了，启动canal后会报几分钟的连不上mysql的错误，但是过个几分钟后自己又连上了，这个问题已经困扰我几天了。

java.io.IOException: connect /10.11.30.3:3306 failure at com.alibaba.otter.canal.parse.driver.mysql.MysqlConnector.connect(MysqlConnector.java:74) ~[canal.parse.driver-1.0.26-SNAPSHOT.jar:na] at com.alibaba.otter.canal.parse.inbound.mysql.MysqlConnection.connect(MysqlConnection.java:72) ~[canal.parse-1.0.26-SNAPSHOT.jar:na] at com.alibaba.otter.canal.parse.inbound.AbstractEventParser$3.run(AbstractEventParser.java:162) ~[canal.parse-1.0.26-SNAPSHOT.jar:na] at java.lang.Thread.run(Thread.java:748) [na:1.8.0_131] Caused by: java.io.IOException: socket read timeout occured ! at com.alibaba.otter.canal.parse.driver.mysql.socket.SocketChannel.read(SocketChannel.java:78) ~[canal.parse.driver-1.0.26-SNAPSHOT.jar:na] at com.alibaba.otter.canal.parse.driver.mysql.utils.PacketManager.readHeader(PacketManager.java:18) ~[canal.parse.driver-1.0.26-SNAPSHOT.jar:na] at com.alibaba.otter.canal.parse.driver.mysql.MysqlConnector.negotiate(MysqlConnector.java:150) ~[canal.parse.driver-1.0.26-SNAPSHOT.jar:na] at com.alibaba.otter.canal.parse.driver.mysql.MysqlConnector.connect(MysqlConnector.java:71) ~[canal.parse.driver-1.0.26-SNAPSHOT.jar:na] ... 3 common frames omitted 2018-01-26 09:35:09.559 [destination = example , address = /10.11.30.3:3306 , EventParser] ERROR com.alibaba.otter.canal.common.alarm.LogAlarmHandler - destination:example[java.io.IOException: connect /10.11.30.3:3306 failure at com.alibaba.otter.canal.parse.driver.mysql.MysqlConnector.connect(MysqlConnector.java:74) at com.alibaba.otter.canal.parse.inbound.mysql.MysqlConnection.connect(MysqlConnection.java:72) at com.alibaba.otter.canal.parse.inbound.AbstractEventParser$3.run(AbstractEventParser.java:162) at java.lang.Thread.run(Thread.java:748) Caused by: java.io.IOException: socket read timeout occured ! at com.alibaba.otter.canal.parse.driver.mysql.socket.SocketChannel.read(SocketChannel.java:78) at com.alibaba.otter.canal.parse.driver.mysql.utils.PacketManager.readHeader(PacketManager.java:18) at com.alibaba.otter.canal.parse.driver.mysql.MysqlConnector.negotiate(MysqlConnector.java:150) at com.alibaba.otter.canal.parse.driver.mysql.MysqlConnector.connect(MysqlConnector.java:71) ... 3 more ] 2018-01-26 09:35:27.296 [destination = example , address = /10.11.30.3:3306 , EventParser] ERROR c.a.otter.canal.parse.inbound.mysql.MysqlEventParser - dump address /10.11.30.3:3306 has an error, retrying. caused by com.alibaba.otter.canal.parse.exception.CanalParseException: java.io.IOException: connect /10.11.30.3:3306 failure Caused by: java.io.IOException: connect /10.11.30.3:3306 failure at com.alibaba.otter.canal.parse.driver.mysql.MysqlConnector.connect(MysqlConnector.java:74) ~[canal.parse.driver-1.0.26-SNAPSHOT.jar:na] at com.alibaba.otter.canal.parse.inbound.mysql.MysqlConnection.connect(MysqlConnection.java:72) ~[canal.parse-1.0.26-SNAPSHOT.jar:na] at com.alibaba.otter.canal.parse.inbound.mysql.MysqlEventParser.preDump(MysqlEventParser.java:87) ~[canal.parse-1.0.26-SNAPSHOT.jar:na] at com.alibaba.otter.canal.parse.inbound.AbstractEventParser$3.run(AbstractEventParser.java:160) ~[canal.parse-1.0.26-SNAPSHOT.jar:na] at java.lang.Thread.run(Thread.java:748) [na:1.8.0_131] Caused by: java.io.IOException: socket read timeout occured ! at com.alibaba.otter.canal.parse.driver.mysql.socket.SocketChannel.read(SocketChannel.java:78) ~[canal.parse.driver-1.0.26-SNAPSHOT.jar:na] at com.alibaba.otter.canal.parse.driver.mysql.utils.PacketManager.readHeader(PacketManager.java:18) ~[canal.parse.driver-1.0.26-SNAPSHOT.jar:na] at com.alibaba.otter.canal.parse.driver.mysql.MysqlConnector.negotiate(MysqlConnector.java:150) ~[canal.parse.driver-1.0.26-SNAPSHOT.jar:na] at com.alibaba.otter.canal.parse.driver.mysql.MysqlConnector.connect(MysqlConnector.java:71) ~[canal.parse.driver-1.0.26-SNAPSHOT.jar:na] ... 4 common frames omitted 2018-01-26 09:35:27.298 [destination = example , address = /10.11.30.3:3306 , EventParser] ERROR com.alibaba.otter.canal.common.alarm.LogAlarmHandler - destination:example[com.alibaba.otter.canal.parse.exception.CanalParseException: java.io.IOException: connect /10.11.30.3:3306 failure Caused by: java.io.IOException: connect /10.11.30.3:3306 failure at com.alibaba.otter.canal.parse.driver.mysql.MysqlConnector.connect(MysqlConnector.java:74) at com.alibaba.otter.canal.parse.inbound.mysql.MysqlConnection.connect(MysqlConnection.java:72) at com.alibaba.otter.canal.parse.inbound.mysql.MysqlEventParser.preDump(MysqlEventParser.java:87) at com.alibaba.otter.canal.parse.inbound.AbstractEventParser$3.run(AbstractEventParser.java:160) at java.lang.Thread.run(Thread.java:748) Caused by: java.io.IOException: socket read timeout occured ! at com.alibaba.otter.canal.parse.driver.mysql.socket.SocketChannel.read(SocketChannel.java:78) at com.alibaba.otter.canal.parse.driver.mysql.utils.PacketManager.readHeader(PacketManager.java:18) at com.alibaba.otter.canal.parse.driver.mysql.MysqlConnector.negotiate(MysqlConnector.java:150) at com.alibaba.otter.canal.parse.driver.mysql.MysqlConnector.connect(MysqlConnector.java:71) ... 4 more ] 2018-01-26 09:35:47.022 [destination = example , address = /10.11.30.3:3306 , EventParser] WARN c.a.otter.canal.parse.inbound.mysql.MysqlEventParser - prepare to find start position just last position {"identity":{"slaveId":-1,"sourceAddress":{"address":"10.11.30.3","port":3306}},"postion":{"included":false,"journalName":"mysql-log-bin.000005","position":4353,"serverId":999,"timestamp":1516859980000}}

原提问者GitHub用户wslovenide