Liquibase：通信鏈路故障

Question

我嘗試從終端運行Liquibase：

命令：

user@Host ~/Development/Liquibase $ java -jar liquibase.jar --changeLogFile=ChangeLog/create.xml --username=root --password=Pass123 --url=jdbc:mysql://192.168.1.8:3306/Semafor --classpath=lib/mysql-connector-java-5.1.44-bin.jar update 
Unexpected error running Liquibase: com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure 
The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server. 

ping主機：

~/Documents/Development/Liquibase $ ping 192.168.1.8 
PING 192.168.1.8 (192.168.1.8) 56(84) bytes of data. 
64 bytes from 192.168.1.8: icmp_seq=1 ttl=64 time=1.29 ms 

Answer 1

很難說，但它可能是，雖然您可以ping主機，其他通信被防火牆或類似設備阻止。你應該檢查MySQL端口是否打開。