Unable to establish connection with MySql server

We found this prefix in 96 webpages.
MapChildren (2)Typical messages (80)TraceDetailed Map
  1. java.io.EOFException
    1.   at com.mysql.jdbc.MysqlIO.readFully()
    2.   at com.mysql.jdbc.MysqlIO.reuseAndReadPacket()
  2. com.mysql.jdbc.exceptions.jdbc4.CommunicationsException
    1.   at sun.reflect.NativeConstructorAccessorImpl.newInstance0()
    2.   at sun.reflect.NativeConstructorAccessorImpl.newInstance()
    3.   at sun.reflect.DelegatingConstructorAccessorImpl.newInstance()
    4.   at java.lang.reflect.Constructor.newInstance()
    5.   at com.mysql.jdbc.Util.handleNewInstance()
    6.   at com.mysql.jdbc.SQLError.createCommunicationsException()
    7.   at com.mysql.jdbc.MysqlIO.reuseAndReadPacket()
  1. CommunicationsException

    MysqlIO.reuseAndReadPacket()
    Crashes:79
    Projects:0
    Web Pages:63
    Error Reports:0
    First:4 months ago
    Last:4 months ago
    preview
  2. CommunicationsException

    MysqlIO.checkErrorPacket()
    Crashes:43
    Projects:0
    Web Pages:39
    Error Reports:0
    First:4 months ago
    Last:4 months ago
    preview
MessageNumber of crashes
No operations allowed after connection closed.9
No operations allowed after connection closed.Connection was implicitly closed by the driver.3
could not extract ResultSet3
could not execute query; nested exception is org.hibernate.exception.JDBCConnectionException: could not execute query2
Cannot open connection2
Error while extracting DatabaseMetaData; nested exception is com.mysql.jdbc.exceptions.jdbc4.MySQLNonTransientConnectionException: No operations allowed after connection closed.2
org.hibernate.exception.JDBCConnectionException: could not extract ResultSet2
Communications link failure Last packet sent to the server was 10 ms ago.1
Communications link failure The last packet successfully received from the server was 10,010 milliseconds ago. The last packet sent successfully to the server was 9 milliseconds ago.1
could not prepare statement1
  1. java.io.EOFException
    1.   at com.mysql.jdbc.MysqlIO.readFully()
    2.   at com.mysql.jdbc.MysqlIO.reuseAndReadPacket()
  2. com.mysql.jdbc.exceptions.jdbc4.CommunicationsException
    1.   at sun.reflect.NativeConstructorAccessorImpl.newInstance0()
    2.   at sun.reflect.NativeConstructorAccessorImpl.newInstance()
    3.   at sun.reflect.DelegatingConstructorAccessorImpl.newInstance()
    4.   at java.lang.reflect.Constructor.newInstance()
    5.   at com.mysql.jdbc.Util.handleNewInstance()
    6.   at com.mysql.jdbc.SQLError.createCommunicationsException()
    7.   at com.mysql.jdbc.MysqlIO.reuseAndReadPacket()