could not execute query. The program does not see the table

I have already described my problem, but now I will do it more specifically. The program is on the server, it works the day, every night the program falls. When restarting tomkata again everything is normal. In the morning when displaying the contents of the table, I received the following errors:

org.hibernate.exception.GenericJDBCException: could not execute query at org.hibernate.exception.ErrorCodeConverter.handledNonSpecificException(ErrorCodeConverter.java:92) at org.hibernate.exception.ErrorCodeConverter.convert(ErrorCodeConverter.java:80) at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:43) at org.hibernate.loader.Loader.doList(Loader.java:1518) at org.hibernate.loader.Loader.list(Loader.java:1498) at org.hibernate.loader.hql.QueryLoader.list(QueryLoader.java:369) at org.hibernate.hql.ast.QueryTranslatorImpl.list(QueryTranslatorImpl.java:266) at org.hibernate.impl.SessionImpl.list(SessionImpl.java:788) at org.hibernate.impl.QueryImpl.list(QueryImpl.java:74) at DAOImpl.JurnalDAOImpl.getAllJurnal(JurnalDAOImpl.java:34) at servlets.JurnalController.performTask(JurnalController.java:45) at servlets.AbstractController.doGet(AbstractController.java:14) at javax.servlet.http.HttpServlet.service(HttpServlet.java:621) at javax.servlet.http.HttpServlet.service(HttpServlet.java:728) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123) at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99) at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:936) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:407) at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1004) at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:589) at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:310) at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) at java.lang.Thread.run(Unknown Source) Caused by: com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure Last packet sent to the server was 50841 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:403) at com.mysql.jdbc.SQLError.createCommunicationsException(SQLError.java:1074) at com.mysql.jdbc.MysqlIO.reuseAndReadPacket(MysqlIO.java:2874) at com.mysql.jdbc.MysqlIO.reuseAndReadPacket(MysqlIO.java:2764) at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3286) at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1852) at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:1975) at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2476) at com.mysql.jdbc.PreparedStatement.executeInternal(PreparedStatement.java:1583) at com.mysql.jdbc.PreparedStatement.executeQuery(PreparedStatement.java:1725) at org.hibernate.jdbc.AbstractBatcher.getResultSet(AbstractBatcher.java:118) at org.hibernate.loader.Loader.getResultSet(Loader.java:1197) at org.hibernate.loader.Loader.doQuery(Loader.java:366) at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:206) at org.hibernate.loader.Loader.doList(Loader.java:1515) ... 26 more 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:2330) at com.mysql.jdbc.MysqlIO.reuseAndReadPacket(MysqlIO.java:2775) ... 38 more org.hibernate.exception.GenericJDBCException: could not execute query at org.hibernate.exception.ErrorCodeConverter.handledNonSpecificException(ErrorCodeConverter.java:92) at org.hibernate.exception.ErrorCodeConverter.convert(ErrorCodeConverter.java:80) at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:43) at org.hibernate.loader.Loader.doList(Loader.java:1518) at org.hibernate.loader.Loader.list(Loader.java:1498) at org.hibernate.loader.hql.QueryLoader.list(QueryLoader.java:369) at org.hibernate.hql.ast.QueryTranslatorImpl.list(QueryTranslatorImpl.java:266) at org.hibernate.impl.SessionImpl.list(SessionImpl.java:788) at org.hibernate.impl.QueryImpl.list(QueryImpl.java:74) at DAOImpl.RajonDAOImpl.getAllRajon(RajonDAOImpl.java:26) at servlets.JurnalController.performTask(JurnalController.java:47) at servlets.AbstractController.doGet(AbstractController.java:14) at javax.servlet.http.HttpServlet.service(HttpServlet.java:621) at javax.servlet.http.HttpServlet.service(HttpServlet.java:728) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123) at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99) at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:936) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:407) at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1004) at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:589) at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:310) at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) at java.lang.Thread.run(Unknown Source) Caused by: com.mysql.jdbc.exceptions.jdbc4.MySQLNonTransientConnectionException: No operations allowed after connection closed.Connection was implicitly closed due to underlying exception/error: ** BEGIN NESTED EXCEPTION ** com.mysql.jdbc.exceptions.jdbc4.CommunicationsException MESSAGE: Communications link failure Last packet sent to the server was 50841 ms ago. STACKTRACE: com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure Last packet sent to the server was 50841 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:403) at com.mysql.jdbc.SQLError.createCommunicationsException(SQLError.java:1074) at com.mysql.jdbc.MysqlIO.reuseAndReadPacket(MysqlIO.java:2874) at com.mysql.jdbc.MysqlIO.reuseAndReadPacket(MysqlIO.java:2764) at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3286) at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1852) at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:1975) at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2476) at com.mysql.jdbc.PreparedStatement.executeInternal(PreparedStatement.java:1583) at com.mysql.jdbc.PreparedStatement.executeQuery(PreparedStatement.java:1725) at org.hibernate.jdbc.AbstractBatcher.getResultSet(AbstractBatcher.java:118) at org.hibernate.loader.Loader.getResultSet(Loader.java:1197) at org.hibernate.loader.Loader.doQuery(Loader.java:366) at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:206) at org.hibernate.loader.Loader.doList(Loader.java:1515) at org.hibernate.loader.Loader.list(Loader.java:1498) at org.hibernate.loader.hql.QueryLoader.list(QueryLoader.java:369) at org.hibernate.hql.ast.QueryTranslatorImpl.list(QueryTranslatorImpl.java:266) at org.hibernate.impl.SessionImpl.list(SessionImpl.java:788) at org.hibernate.impl.QueryImpl.list(QueryImpl.java:74) at DAOImpl.JurnalDAOImpl.getAllJurnal(JurnalDAOImpl.java:34) at servlets.JurnalController.performTask(JurnalController.java:45) at servlets.AbstractController.doGet(AbstractController.java:14) at javax.servlet.http.HttpServlet.service(HttpServlet.java:621) at javax.servlet.http.HttpServlet.service(HttpServlet.java:728) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123) at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99) at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:936) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:407) at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1004) at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:589) at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:310) at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) at java.lang.Thread.run(Unknown Source) 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:2330) at com.mysql.jdbc.MysqlIO.reuseAndReadPacket(MysqlIO.java:2775) ... 38 more ** END NESTED EXCEPTION ** 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:403) at com.mysql.jdbc.Util.getInstance(Util.java:378) at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:985) at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:957) at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:927) at com.mysql.jdbc.ConnectionImpl.checkClosed(ConnectionImpl.java:1102) at com.mysql.jdbc.ConnectionImpl.prepareStatement(ConnectionImpl.java:3906) at com.mysql.jdbc.ConnectionImpl.prepareStatement(ConnectionImpl.java:3872) at org.hibernate.jdbc.AbstractBatcher.getPreparedStatement(AbstractBatcher.java:379) at org.hibernate.jdbc.AbstractBatcher.getPreparedStatement(AbstractBatcher.java:320) at org.hibernate.jdbc.AbstractBatcher.prepareQueryStatement(AbstractBatcher.java:86) at org.hibernate.loader.Loader.prepareQueryStatement(Loader.java:1089) at org.hibernate.loader.Loader.doQuery(Loader.java:365) at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:206) at org.hibernate.loader.Loader.doList(Loader.java:1515) ... 26 more 

Tell me what could be the problem = (And yes, there are 2 programs on the server, they are written according to one principle. 1 works, and the second falls. Thanks in advance