誰能告訴我為什么會這樣“ org.hibernate.exception.GenericJDBCException：無法執行查詢”？

Question

我們的服務器從去年開始就在客戶端站點上運行，但是由於某些SQL / Hibernate異常，昨晚服務器突然停止響應，但是在重新啟動服務器后，一切又重新開始工作。

這是我們的休眠配置（.hbm.xml）：

<property name="connection.driver_class">org.gjt.mm.mysql.Driver</property>
    <property name="connection.url">jdbc:mysql://127.0.0.1:3306/emessenger</property>
    <property name="hibernate.current_session_context_class">org.hibernate.context.ThreadLocalSessionContext</property>
    <property name="connection.username">root</property>
    <property name="connection.password">root</property>
    <property name="show_sql">false</property>
    <property name="connection.provider_class">org.hibernate.connection.C3P0ConnectionProvider</property>
    <property name="c3p0.min_size">1</property>
    <property name="c3p0.max_size">100</property>
    <property name="c3p0.timeout">5</property>
    <property name="c3p0.max_statements">0</property>

這是異常跟蹤，（當時您拋出了類似的三個異常，如果您希望我也可以向您顯示這些異常）：

    2014-02-05 02:18:47,116 ERROR [services.alert.AlertDB] [577]: Exception occured while fetching <alert_details> table for quikc message  
   org.hibernate.exception.GenericJDBCException: could not execute query
    at org.hibernate.exception.SQLStateConverter.handledNonSpecificException(SQLStateConverter.java:103)
    at org.hibernate.exception.SQLStateConverter.convert(SQLStateConverter.java:91)
    at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:43)
    at org.hibernate.loader.Loader.doList(Loader.java:2223)
    at org.hibernate.loader.Loader.listIgnoreQueryCache(Loader.java:2104)
    at org.hibernate.loader.Loader.list(Loader.java:2099)
    at org.hibernate.loader.criteria.CriteriaLoader.list(CriteriaLoader.java:94)
    at org.hibernate.impl.SessionImpl.list(SessionImpl.java:1569)
    at org.hibernate.impl.CriteriaImpl.list(CriteriaImpl.java:283)
    at services.alert.AlertDB.retrieveMessageDetails(AlertDB.java:568)
    at services.alert.Alert.getMessages(Alert.java:925)
    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:597)
    at org.apache.axis2.rpc.receivers.RPCUtil.invokeServiceClass(RPCUtil.java:212)
    at org.apache.axis2.rpc.receivers.RPCMessageReceiver.invokeBusinessLogic(RPCMessageReceiver.java:117)
    at org.apache.axis2.receivers.AbstractInOutMessageReceiver.invokeBusinessLogic(AbstractInOutMessageReceiver.java:40)
    at org.apache.axis2.receivers.AbstractMessageReceiver.receive(AbstractMessageReceiver.java:114)
    at org.apache.axis2.engine.AxisEngine.receive(AxisEngine.java:181)
    at org.apache.axis2.transport.http.util.RESTUtil.invokeAxisEngine(RESTUtil.java:144)
    at org.apache.axis2.transport.http.util.RESTUtil.processURLRequest(RESTUtil.java:139)
    at org.apache.axis2.transport.http.AxisServlet$RestRequestProcessor.processURLRequest(AxisServlet.java:837)
    at org.apache.axis2.transport.http.AxisServlet.doGet(AxisServlet.java:273)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:617)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:298)
    at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:857)
    at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:588)
    at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489)
    at java.lang.Thread.run(Thread.java:619)
        Caused by: java.sql.SQLException: Query execution was interrupted
    at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1072)
    at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3563)
    at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3495)
    at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1959)
    at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2113)
    at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2693)
    at com.mysql.jdbc.PreparedStatement.executeInternal(PreparedStatement.java:2102)
    at com.mysql.jdbc.PreparedStatement.executeQuery(PreparedStatement.java:2261)
    at com.mchange.v2.c3p0.impl.NewProxyPreparedStatement.executeQuery(NewProxyPreparedStatement.java:76)
    at org.hibernate.jdbc.AbstractBatcher.getResultSet(AbstractBatcher.java:186)
    at org.hibernate.loader.Loader.getResultSet(Loader.java:1787)
    at org.hibernate.loader.Loader.doQuery(Loader.java:674)
    at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:236)
    at org.hibernate.loader.Loader.doList(Loader.java:2220)
    ... 34 more

誰能告訴我這是怎么回事，我們是否需要升級到新的休眠模式？ 還是必須更改某些MySQL設置？ 還是與c3p0配置有關？

編輯以添加第一個例外，之后一切開始：

[2014-02-05 02:18:26,085] WARN com.mchange.v2.resourcepool.BasicResourcePool.prelimCheckoutResource : com.mchange.v2.resourcepool.BasicResourcePool@1b5c22f -- an attempt to checkout a resource was interrupted, and the pool is still live: some other thread must have either interrupted the Thread attempting checkout! 
 java.lang.InterruptedException
    at java.lang.Object.wait(Native Method)
    at com.mchange.v2.resourcepool.BasicResourcePool.awaitAvailable(BasicResourcePool.java:1315)
    at com.mchange.v2.resourcepool.BasicResourcePool.prelimCheckoutResource(BasicResourcePool.java:557)
    at com.mchange.v2.resourcepool.BasicResourcePool.checkoutResource(BasicResourcePool.java:477)
    at com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool.checkoutPooledConnection(C3P0PooledConnectionPool.java:525)
    at com.mchange.v2.c3p0.impl.AbstractPoolBackedDataSource.getConnection(AbstractPoolBackedDataSource.java:128)
    at org.hibernate.connection.C3P0ConnectionProvider.getConnection(C3P0ConnectionProvider.java:56)
    at org.hibernate.jdbc.ConnectionManager.openConnection(ConnectionManager.java:423)
    at org.hibernate.jdbc.ConnectionManager.getConnection(ConnectionManager.java:144)
    at org.hibernate.jdbc.AbstractBatcher.prepareQueryStatement(AbstractBatcher.java:139)
    at org.hibernate.loader.Loader.prepareQueryStatement(Loader.java:1547)
    at org.hibernate.loader.Loader.doQuery(Loader.java:673)
    at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:236)
    at org.hibernate.loader.Loader.doList(Loader.java:2220)
    at org.hibernate.loader.Loader.listIgnoreQueryCache(Loader.java:2104)
    at org.hibernate.loader.Loader.list(Loader.java:2099)
    at org.hibernate.loader.criteria.CriteriaLoader.list(CriteriaLoader.java:94)
    at org.hibernate.impl.SessionImpl.list(SessionImpl.java:1569)
    at org.hibernate.impl.CriteriaImpl.list(CriteriaImpl.java:283)
    at org.hibernate.impl.CriteriaImpl.uniqueResult(CriteriaImpl.java:305)
    at global.SessionMgmtListerner.thinClientStatus(SessionMgmtListerner.java:223)
    at global.SessionMgmtListerner.sessionDestroyed(SessionMgmtListerner.java:48)
    at org.apache.catalina.session.StandardSession.expire(StandardSession.java:708)
    at org.apache.catalina.session.StandardSession.isValid(StandardSession.java:575)
    at org.apache.catalina.session.ManagerBase.processExpires(ManagerBase.java:700)
    at org.apache.catalina.session.ManagerBase.backgroundProcess(ManagerBase.java:685)
    at org.apache.catalina.core.ContainerBase.backgroundProcess(ContainerBase.java:1316)
    at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.processChildren(ContainerBase.java:1601)
    at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.processChildren(ContainerBase.java:1610)
    at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.processChildren(ContainerBase.java:1610)
    at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.run(ContainerBase.java:1590)
    at java.lang.Thread.run(Thread.java:619)

Answer 1

您正在使用舊的mysql驅動程序，請使用

com.mysql.jdbc.Driver

Answer 2

嵌套異常表明MySQL服務器端的某些內容中斷了查詢。 我建議您檢查MySQL日志和系統日志（在數據庫服務器上）以獲取有關可能原因的線索。

沒有足夠的證據說明根本原因是在Hibernate，C3PO，MySQL還是JDBC驅動程序中。 或者是其他東西。 不知道根本原因是什么，沒有人可以自信地提出解決方案。 （或者至少沒有人可以有正當的信心做到這一點。海事組織。）