Hi all,
today my WebApp has started to give me this error

com.mysql.jdbc.exceptions.jdbc4.CommunicationsException
> MESSAGE: Communications link failure
> Last packet sent to the server was 1 ms ago.
> STACKTRACE:
> com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications
> link failure
> Last packet sent to the server was 1 ms ago.
> at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
> at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
> at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown
> Source)
> at java.lang.reflect.Constructor.newInstance(Unknown Source)
> at com.mysql.jdbc.Util.handleNewInstance(Util.java:406)
> at
> com.mysql.jdbc.SQLError.createCommunicationsException(SQLError.java:1074)
> at com.mysql.jdbc.MysqlIO.reuseAndReadPacket(MysqlIO.java:2873)
> at com.mysql.jdbc.MysqlIO.reuseAndReadPacket(MysqlIO.java:2763)
> at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3299)
> at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1837)
> at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:1961)
> at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2543)
> at
> com.mysql.jdbc.PreparedStatement.executeInternal(PreparedStatement.java:1737)
> at
> com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:2022)
> at
> com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:1940)
> at
> com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:1925)
> at
> com.macchina.server.GreetingServiceImpl.SQL_annulla_fase(GreetingServiceImpl.java:679)
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
> at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
> at java.lang.reflect.Method.invoke(Unknown Source)
> at com.google.gwt.user.server.rpc.RPC.invokeAndEncodeResponse(RPC.java:561)
> at
> com.google.gwt.user.server.rpc.RemoteServiceServlet.processCall(RemoteServiceServlet.java:208)
> at
> com.google.gwt.user.server.rpc.RemoteServiceServlet.processPost(RemoteServiceServlet.java:248)
> at
> com.google.gwt.user.server.rpc.AbstractRemoteServiceServlet.doPost(AbstractRemoteServiceServlet.java:62)
> at javax.servlet.http.HttpServlet.service(HttpServlet.java:637)
> at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
> at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:487)
> at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:362)
> at
> org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)
> at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:181)
> at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:729)
> at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:405)
> at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
> at
> org.mortbay.jetty.handler.RequestLogHandler.handle(RequestLogHandler.java:49)
> at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
> at org.mortbay.jetty.Server.handle(Server.java:324)
> at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:505)
> at
> org.mortbay.jetty.HttpConnection$RequestHandler.content(HttpConnection.java:843)
> at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:647)
> at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:211)
> at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:380)
> at
> org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:395)
> at
> org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:488)
> Caused by: java.net.SocketException: Software caused connection abort:
> recv failed
> at java.net.SocketInputStream.socketRead0(Native Method)
> at java.net.SocketInputStream.read(Unknown Source)
> at java.net.SocketInputStream.read(Unknown Source)
> at
> com.mysql.jdbc.util.ReadAheadInputStream.fill(ReadAheadInputStream.java:113)
> at
> com.mysql.jdbc.util.ReadAheadInputStream.readFromUnderlyingStreamIfNecessary(ReadAheadInputStream.java:160)
> at
> com.mysql.jdbc.util.ReadAheadInputStream.read(ReadAheadInputStream.java:188)
> at com.mysql.jdbc.MysqlIO.readFully(MysqlIO.java:2329)
> at com.mysql.jdbc.MysqlIO.reuseAndReadPacket(MysqlIO.java:2774)
> ... 37 more
>
> ** END NESTED EXCEPTION **


from yesterday i've not changed nothing.. What's happen?

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