【Exception】com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure

最新推荐文章于 2024-12-06 19:36:20 发布

原创最新推荐文章于 2024-12-06 19:36:20 发布 · 351 阅读

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博客指出案发现场问题，经分析原因是MySQL服务未启动，针对此原因给出解决方案，即启动MySQL服务。

案发现场

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.
	at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) ~[na:1.8.0_221]
	at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62) ~[na:1.8.0_221]
	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) ~[na:1.8.0_221]
	at java.lang.reflect.Constructor.newInstance(Constructor.java:423) ~[na:1.8.0_221]
	at com.mysql.jdbc.Util.handleNewInstance(Util.java:425) ~[mysql-connector-java-5.1.46.jar:5.1.46]
	at com.mysql.jdbc.SQLError.createCommunicationsException(SQLError.java:990) ~[mysql-connector-java-5.1.46.jar:5.1.46]
	at com.mysql.jdbc.MysqlIO.<init>(MysqlIO.java:342) ~[mysql-connector-java-5.1.46.jar:5.1.46]
	at com.mysql.jdbc.ConnectionImpl.coreConnect(ConnectionImpl.java:2188) ~[mysql-connector-java-5.1.46.jar:5.1.46]

原因分析

原因一：MySQL服务未启动

解决方案

原因一解决方案：启动MySQL服务