报错信息
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.
...
解决办法
; eclipse.ini
-Djava.net.preferIPv4Stack=true
具体错误原因嘛,好像是由于jvm中的配置改变,导致jvm无法通过网络获取部分信息
自述)确实,刚刚升级 JDK 到 Java 11,然后由切换回 Java 8。
# ~/src/bash/bash_profile.d/lang.sh
...
export JAVA_HOME=$(/usr/libexec/java_home -v 1.8)
#export JAVA_HOME=$(/usr/libexec/java_home -v 11)
...