Възникна грешка: 

Съобщение:
 
com.mysql.jdbc.CommunicationsException: Communications link failure due to underlying exception: ** BEGIN NESTED EXCEPTION ** java.net.ConnectException MESSAGE: Connection refused STACKTRACE: java.net.ConnectException: Connection refused at java.net.PlainSocketImpl.socketConnect(Native Method) at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350) at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206) at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188) at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392) at java.net.Socket.connect(Socket.java:589) at java.net.Socket.connect(Socket.java:538) at java.net.Socket.(Socket.java:434) at java.net.Socket.(Socket.java:244) at com.mysql.jdbc.StandardSocketFactory.connect(StandardSocketFactory.java:173) at com.mysql.jdbc.MysqlIO.(MysqlIO.java:267) at com.mysql.jdbc.Connection.createNewIO(Connection.java:2739) at com.mysql.jdbc.Connection.(Connection.java:1553) at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:266) at java.sql.DriverManager.getConnection(DriverManager.java:664) at java.sql.DriverManager.getConnection(DriverManager.java:208) at com.zahariev.jframe.tools.pools.MySQLConnectionPool.getConnection(MySQLConnectionPool.java:107) at com.zahariev.jframe.controller.ComponentManager.getConnection(ComponentManager.java:305) at com.zahariev.jframe.controller.Context.getConnection(Context.java:288) at com.zahariev.jframe.controller.BaseDataObjectLoader.getConnection(BaseDataObjectLoader.java:71) at org.zachatie.ovcalendar.domain.UserLoader.loadObjects(UserLoader.java:415) at org.zachatie.ovcalendar.commands.GenericCyclesExtractorCommand.process(GenericCyclesExtractorCommand.java:59) at com.zahariev.jframe.controller.BaseCommand.jprocess(BaseCommand.java:140) at org.zachatie.ovcalendar.controller.BaseOvCalendarCommand.jprocess(BaseOvCalendarCommand.java:25) at com.zahariev.jframe.controller.JFrameHTTPServlet.dispatchRequest(JFrameHTTPServlet.java:231) at com.zahariev.jframe.controller.JFrameHTTPServlet.doGet(JFrameHTTPServlet.java:178) at javax.servlet.http.HttpServlet.service(HttpServlet.java:624) at javax.servlet.http.HttpServlet.service(HttpServlet.java:731) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:303) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208) at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:202) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:122) at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:505) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:169) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:442) at org.apache.coyote.ajp.AjpProcessor.process(AjpProcessor.java:190) at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:623) at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:316) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) at java.lang.Thread.run(Thread.java:745) ** END NESTED EXCEPTION ** Last packet sent to the server was 20 ms ago.
 
Стек:      com.zahariev.jframe.controller.ComponentManager.getConnection(ComponentManager.java:311)      com.zahariev.jframe.controller.Context.getConnection(Context.java:288)      com.zahariev.jframe.controller.BaseDataObjectLoader.getConnection(BaseDataObjectLoader.java:71)      org.zachatie.ovcalendar.domain.UserLoader.loadObjects(UserLoader.java:415)      org.zachatie.ovcalendar.commands.GenericCyclesExtractorCommand.process(GenericCyclesExtractorCommand.java:59)      com.zahariev.jframe.controller.BaseCommand.jprocess(BaseCommand.java:140)      org.zachatie.ovcalendar.controller.BaseOvCalendarCommand.jprocess(BaseOvCalendarCommand.java:25)      com.zahariev.jframe.controller.JFrameHTTPServlet.dispatchRequest(JFrameHTTPServlet.java:231)      com.zahariev.jframe.controller.JFrameHTTPServlet.doGet(JFrameHTTPServlet.java:178)      javax.servlet.http.HttpServlet.service(HttpServlet.java:624)      javax.servlet.http.HttpServlet.service(HttpServlet.java:731)      org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:303)      org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)      org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)      org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)      org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)      org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:202)      org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:122)      org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:505)      org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:169)      org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103)      org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116)      org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:442)      org.apache.coyote.ajp.AjpProcessor.process(AjpProcessor.java:190)      org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:623)      org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:316)      java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)      java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)      org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)      java.lang.Thread.run(Thread.java:745)
 
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