MySQL "Communications link failure Last packet sent to the server was 0 ms ago"

Solution Verified - Updated -

Issue

  • The MySQL driver cannot connect to the MySQL database server
  • Seeing below error message:

    ....
    Caused by: com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure Last packet sent to the server was 0 ms ago.
          at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
          at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
          at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
          at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
          at com.mysql.jdbc.Util.handleNewInstance(Util.java:406)
          at com.mysql.jdbc.SQLError.createCommunicationsException(SQLError.java:1074)
          at com.mysql.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:2103)
          at com.mysql.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:718)
          at com.mysql.jdbc.JDBC4Connection.<init>(JDBC4Connection.java:46)
          at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
          at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
          at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
          at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
          at com.mysql.jdbc.Util.handleNewInstance(Util.java:406)
          at com.mysql.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:302)
          at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:282)
          ...
    Caused by: java.net.ConnectException: Connection refused: connect
          at java.net.PlainSocketImpl.socketConnect(Native Method)
          at java.net.PlainSocketImpl.doConnect(PlainSocketImpl.java:333)
          at java.net.PlainSocketImpl.connectToAddress(PlainSocketImpl.java:195)
          at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:182)
          at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:366)
          at java.net.Socket.connect(Socket.java:525)
          at java.net.Socket.connect(Socket.java:475)
          at java.net.Socket.<init>(Socket.java:372)
          at java.net.Socket.<init>(Socket.java:215)
          at com.mysql.jdbc.StandardSocketFactory.connect(StandardSocketFactory.java:253)
          at com.mysql.jdbc.MysqlIO.<init>(MysqlIO.java:280)
          at com.mysql.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:2026)
          ... 81 more
    

Environment

  • Red Hat JBoss Enterprise Application Platform (EAP)
    • 4
    • 5
    • 6
    • 7
  • MySQL (any version)

Subscriber exclusive content

A Red Hat subscription provides unlimited access to our knowledgebase, tools, and much more.

Current Customers and Partners

Log in for full access

Log In

New to Red Hat?

Learn more about Red Hat subscriptions

Using a Red Hat product through a public cloud?

How to access this content