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Caused by: com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: The last pac
ket successfully received from the server was 41,997,643 milliseconds ago.  The
last packet sent successfully to the server was 41,997,643 milliseconds ago. is
longer than the server configured value of 'wait_timeout'. You should consider e
ither expiring and/or testing connection validity before use in your application
, increasing the server configured values for client timeouts, or using the Conn
ector/J connection property 'autoReconnect=true' to avoid this problem.
        at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)

        at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstruct
orAccessorImpl.java:57)
        at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingC
onstructorAccessorImpl.java:45)
        at java.lang.reflect.Constructor.newInstance(Constructor.java:526)
        at com.mysql.jdbc.Util.handleNewInstance(Util.java:407)
        at com.mysql.jdbc.SQLError.createCommunicationsException(SQLError.java:1
116)
        at com.mysql.jdbc.MysqlIO.send(MysqlIO.java:3348)
        at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1967)
        at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2140)
        at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2620)
        at com.mysql.jdbc.ConnectionImpl.setAutoCommit(ConnectionImpl.java:5022)

        at org.apache.commons.dbcp.DelegatingConnection.setAutoCommit(Delegating
Connection.java:371)
        at org.apache.commons.dbcp.PoolingDataSource$PoolGuardConnectionWrapper.
setAutoCommit(PoolingDataSource.java:328)
        at org.nutz.dao.impl.sql.run.NutDaoRunner.run(NutDaoRunner.java:62)
        ... 42 more
Caused by: java.net.SocketException: Software caused connection abort: socket wr
ite error
        at java.net.SocketOutputStream.socketWrite0(Native Method)
        at java.net.SocketOutputStream.socketWrite(SocketOutputStream.java:113)
        at java.net.SocketOutputStream.write(SocketOutputStream.java:159)
        at java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:82
)
        at java.io.BufferedOutputStream.flush(BufferedOutputStream.java:140)
        at com.mysql.jdbc.MysqlIO.send(MysqlIO.java:3329)
        ... 49 more
2015-12-24 08:33:18,607 WARN  (NutDaoRunner.java:99) - Fail to close connection!

java.sql.SQLException: Already closed.