linux下启动canal报错unknown host
window下canal测试可以，部署到服务器启动报错找不到主机：
错误信息
-10-30 18:20:37.308 [destination = example , address = /192.168.10.2:3306 , EventParser] ERROR c.a.o.c.p.inbound.mysql.rds.RdsBinlogEventParserProxy - dump address /192.168.10.2:3306 has an error, retrying. caused by
com.alibaba.otter.canal.parse.exception.CanalParseException: Unknown host
Caused by: .UnknownHostException: bogon: bogon: Name or service not known
at .InetAddress.getLocalHost(InetAddress.java:1505) ~[na:1.8.0_131]
at com.alibaba.otter.canal.parse.inbound.mysql.MysqlEventParser.generateUniqueServerId(MysqlEventParser.java:330) ~[canal.parse-1.1.5.jar:na]
at com.alibaba.otter.canal.parse.inbound.mysql.MysqlEventParser.buildMysqlConnection(MysqlEventParser.java:314) ~[canal.parse-1.1.5.jar:na]
at com.alibaba.otter.canal.parse.inbound.mysql.MysqlEventParser.buildErosaConnection(MysqlEventParser.java:75) ~[canal.parse-1.1.5.jar:na]
at com.alibaba.otter.canal.parse.inbound.AbstractEventParser$1.run(AbstractEventParser.java:170) ~[canal.parse-1.1.5.jar:na]
at java.lang.Thread.run(Thread.java:748) [na:1.8.0_131]
Caused by: .UnknownHostException: bogon: Name or service not known
at .Inet4AddressImpl.lookupAllHostAddr(Native Method) ~[na:1.8.0_131]
at .InetAddress$2.lookupAllHostAddr(InetAddress.java:928) ~[na:1.8.0_131]
at .InetAddress.getAddressesFromNameService(InetAddress.java:1323) ~[na:1.8.0_131]
at .InetAddress.getLocalHost(InetAddress.java:1500) ~[na:1.8.0_131]
… 5 common frames omitted
-10-30 18:20:37.312 [destination = example , address = /192.168.10.2:3306 , EventParser] ERROR com.alibaba.mon.alarm.LogAlarmHandler - destination:example[com.alibaba.otter.canal.parse.exception.CanalParseException: Unknown host
后发现是由于系统连不上bogon这个主机名
所以类似情况可按如下步骤操作：
1.打开系统hosts文件，vim /etc/hosts2.添加一条主机名和IP地址的映射，如127.0.0.1 bogon
参考链接: /focusyy/blog/613023
