com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure The last packet successfully received from the server was 5,006 milliseconds ago. The last packet sent successfully to the server was 5,001 milliseconds ago.

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    Root Cause Analysis

    1. com.mysql.jdbc.exceptions.jdbc4.CommunicationsException

      Communications link failure The last packet successfully received from the server was 5,006 milliseconds ago. The last packet sent successfully to the server was 5,001 milliseconds ago.

      at sun.reflect.NativeConstructorAccessorImpl.newInstance0()
    2. Java RT
      NativeConstructorAccessorImpl.newInstance0
      1. sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
      1 frame