type Exception report
message
descriptionThe server encountered an internal error () that prevented it from fulfilling this request.
exception
javax.servlet.ServletException: Communications link failure
The last packet successfully received from the server was 114,731 milliseconds ago.  The last packet sent successfully to the server was 19 milliseconds ago.
root cause
com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure
The last packet successfully received from the server was 114,731 milliseconds ago.  The last packet sent successfully to the server was 19 milliseconds ago.
root cause
java.io.EOFException: Can not read response from server. Expected to read 4 bytes, read 0 bytes before connection was unexpectedly lost.
note The full stack traces of the exception and its root causes are available in the GlassFish Server Open Source Edition 3.1.2.2 logs.