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java.sql.SQLException: Communication link failure: java.io.IOException	at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:1606)	at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:886)	at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:945)	at com.mysql.jdbc.Connection.execSQL(Connection.java:1809)	at com.mysql.jdbc.PreparedStatement.executeQuery(PreparedStatement.java:1458)	at com.solarmetric.datasource.PreparedStatementWrapper.executeQuery(PreparedStatementWrapper.java:93)	at com.solarmetric.kodo.impl.jdbc.SQLExecutionManagerImpl.executePreparedQueryInternal(SQLExecutionManagerImpl.java:769)	at com.solarmetric.kodo.impl.jdbc.SQLExecutionManagerImpl.executeQueryInternal(SQLExecutionManagerImpl.java:692)	at com.solarmetric.kodo.impl.jdbc.SQLExecutionManagerImpl.executeQuery(SQLExecutionManagerImpl.java:373)	at com.solarmetric.kodo.impl.jdbc.SQLExecutionManagerImpl.executeQuery(SQLExecutionManagerImpl.java:357)	at com.solarmetric.kodo.impl.jdbc.ormapping.ClassMapping.selectPrimaryMappings(ClassMapping.java:1221)	at com.solarmetric.kodo.impl.jdbc.runtime.JDBCStoreManager.executeQuery(JDBCStoreManager.java:717)	at com.solarmetric.kodo.impl.jdbc.runtime.JDBCQuery.executeQuery(JDBCQuery.java:92)	at com.solarmetric.kodo.query.QueryImpl.executeWithMap(QueryImpl.java:792)	at com.ewarna.pdm.sessions.BasicQuery.getByAdvancedFormula(BasicQuery.java:137)	at com.ewarna.pdm.sessions.BasicQuery.getByAdvancedFormula(BasicQuery.java:65)	at com.ewarna.pdm.sessions.BasicQuery.getByFormula(BasicQuery.java:205)	at com.ewarna.handlers.storage.SessionHandler$1.execute(SessionHandler.java:116)	at com.ewarna.pdm.sessions.JDOCallBackExecutor.execute(JDOCallBackExecutor.java:40)	at com.ewarna.handlers.storage.SessionHandler.login(SessionHandler.java:140)	at com.ewarna.pdm.soap.AbstractSoapService.login(AbstractSoapService.java:44)	at com.ewarna.pdm.soap.xfs.SoapServiceXFSImpl.login(SoapServiceXFSImpl.java:1199)	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)	at java.lang.reflect.Method.invoke(Method.java:324)	at org.apache.soap.server.RPCRouter.invoke(RPCRouter.java:146)	at org.apache.soap.providers.RPCJavaProvider.invoke(RPCJavaProvider.java:129)	at org.apache.soap.server.http.RPCRouterServlet.doPost(RPCRouterServlet.java:354)	at javax.servlet.http.HttpServlet.service(HttpServlet.java:760)	at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:247)	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:193)	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:260)	at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)	at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)	at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)	at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)	at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)	at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)	at org.apache.catalina.core.StandardContext.invoke(StandardContext.java:2396)	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:180)	at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)	at org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherValve.java:170)	at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:172)	at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)	at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)	at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:174)	at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)	at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)	at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)	at org.apache.coyote.tomcat4.CoyoteAdapter.service(CoyoteAdapter.java:223)	at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:405)	at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:380)	at org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:508)	at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:533)	at java.lang.Thread.run(Thread.java:536)