在服务器启动连上数据库一段时间之后会出现上述错误，几次之后会出现“关闭的连接”。具体内容如下： 2008-03-03 20:15:30,265 WARN (JDBCExceptionReporter.java:71) - SQL Error: 17002 , SQLState: null 2008-03-03 20:15:31,093 ERROR (JDBCExceptionReporter.java:72) - Io 异常: Connect ion reset 2008-03-03 20:15:31,109 ERROR (StandardWrapperValve.java:260) - Servlet.service( ) for servlet OlineServiceServlet threw exception org.hibernate.exception.GenericJDBCException: could not execute query at org.hibernate.exception.SQLStateConverter.handledNonSpecificException (SQLStateConverter.java:103) at org.hibernate.exception.SQLStateConverter.convert(SQLStateConverter.j ava:91) at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelp er.java:43) at org.hibernate.loader.Loader.doList(Loader.java:2148) at org.hibernate.loader.Loader.listIgnoreQueryCache(Loader.java:2029) at org.hibernate.loader.Loader.list(Loader.java:2024) at org.hibernate.loader.hql.QueryLoader.list(QueryLoader.java:375) at org.hibernate.hql.ast.QueryTranslatorImpl.list(QueryTranslatorImpl.ja va:308) at org.hibernate.engine.query.HQLQueryPlan.performList(HQLQueryPlan.java :153) at org.hibernate.impl.SessionImpl.list(SessionImpl.java:1106) at org.hibernate.impl.QueryImpl.list(QueryImpl.java:79) at com.szhtp.util.DbAccess.findByHql(DbAccess.java:98) at com.szhtp.interfaces.OlineServiceServlet.doPost(OlineServiceServlet.j ava:54) at com.szhtp.interfaces.OlineServiceServlet.doGet(OlineServiceServlet.ja va:37) at javax.servlet.http.HttpServlet.service(HttpServlet.java:689) at javax.servlet.http.HttpServlet.service(HttpServlet.java:802) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Appl icationFilterChain.java:252) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationF ilterChain.java:173) at com.szhtp.util.filters.CharsetFilter.doFilter(CharsetFilter.java:36) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Appl icationFilterChain.java:202) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationF ilterChain.java:173) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperV alve.java:213) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextV alve.java:178) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.j ava:126) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.j ava:105) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineVal ve.java:107) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.jav a:148) at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java :869) at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.p rocessConnection(Http11BaseProtocol.java:664) at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpo int.java:527) at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFol lowerWorkerThread.java:80) at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadP ool.java:684) at java.lang.Thread.run(Thread.java:595)
