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.

Stack Overflow | Marcon | 8 months ago
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    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.

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Root Cause Analysis

  1. 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()
  2. Java RT
    Constructor.newInstance
    1. sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
    2. sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
    3. sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
    4. java.lang.reflect.Constructor.newInstance(Constructor.java:423)
    4 frames
  3. MySQL jdbc
    JDBC4Connection.<init>
    1. com.mysql.jdbc.Util.handleNewInstance(Util.java:404)
    2. com.mysql.jdbc.SQLError.createCommunicationsException(SQLError.java:981)
    3. com.mysql.jdbc.MysqlIO.<init>(MysqlIO.java:339)
    4. com.mysql.jdbc.ConnectionImpl.coreConnect(ConnectionImpl.java:2253)
    5. com.mysql.jdbc.ConnectionImpl.connectOneTryOnly(ConnectionImpl.java:2286)
    6. com.mysql.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:2085)
    7. com.mysql.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:795)
    8. com.mysql.jdbc.JDBC4Connection.<init>(JDBC4Connection.java:44)
    8 frames