Hibernate和Apache Tomcat問題

我使用Hibernate執行JPA在我的項目中，用Apache Tomcat作爲作爲服務器，PostgreSQL作爲數據庫。從某個時候起，我收到了一個錯誤，那是不存在的。我得到它之後，如果我重新啓動服務器，總的來說每件事情都很順利。貝婁是堆棧跟蹤：Hibernate和Apache Tomcat問題


javax.persistence.PersistenceException: org.hibernate.exception.GenericJDBCException: could not execute query 
    at org.hibernate.ejb.AbstractEntityManagerImpl.convert(AbstractEntityManagerImpl.java:1389) 
    at org.hibernate.ejb.AbstractEntityManagerImpl.convert(AbstractEntityManagerImpl.java:1317) 
    at org.hibernate.ejb.QueryImpl.getSingleResult(QueryImpl.java:307) 
    at com.netnfork.business.authentication.UserChecking.isValidUser(UserChecking.java:105) 
    at com.netnfork.authentication.AuthLogin.doPost(AuthLogin.java:55) 
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:641) 
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:722) 
    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:225) 
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:169) 
    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472) 
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:168) 
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:98) 
    at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:927) 
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118) 
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:407) 
    at org.apache.coyote.ajp.AjpProcessor.process(AjpProcessor.java:200) 
    at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:565) 
    at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:307) 
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110) 
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603) 
    at java.lang.Thread.run(Thread.java:679) 
Caused by: org.hibernate.exception.GenericJDBCException: could not execute query 
    at org.hibernate.exception.SQLStateConverter.handledNonSpecificException(SQLStateConverter.java:140) 
    at org.hibernate.exception.SQLStateConverter.convert(SQLStateConverter.java:128) 
    at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:66) 
    at org.hibernate.loader.Loader.doList(Loader.java:2545) 
    at org.hibernate.loader.Loader.listIgnoreQueryCache(Loader.java:2276) 
    at org.hibernate.loader.Loader.list(Loader.java:2271) 
    at org.hibernate.loader.custom.CustomLoader.list(CustomLoader.java:316) 
    at org.hibernate.impl.SessionImpl.listCustomQuery(SessionImpl.java:1842) 
    at org.hibernate.impl.AbstractSessionImpl.list(AbstractSessionImpl.java:165) 
    at org.hibernate.impl.SQLQueryImpl.list(SQLQueryImpl.java:157) 
    at org.hibernate.ejb.QueryImpl.getSingleResult(QueryImpl.java:274) 
    ... 20 more 
Caused by: org.postgresql.util.PSQLException: FATAL: terminating connection due to administrator command 
    at org.postgresql.core.v3.QueryExecutorImpl.receiveErrorResponse(QueryExecutorImpl.java:2103) 
    at org.postgresql.core.v3.QueryExecutorImpl.processResults(QueryExecutorImpl.java:1836) 
    at org.postgresql.core.v3.QueryExecutorImpl.execute(QueryExecutorImpl.java:257) 
    at org.postgresql.jdbc2.AbstractJdbc2Statement.execute(AbstractJdbc2Statement.java:512) 
    at org.postgresql.jdbc2.AbstractJdbc2Statement.executeWithFlags(AbstractJdbc2Statement.java:388) 
    at org.postgresql.jdbc2.AbstractJdbc2Statement.executeQuery(AbstractJdbc2Statement.java:273) 
    at org.hibernate.jdbc.AbstractBatcher.getResultSet(AbstractBatcher.java:208) 
    at org.hibernate.loader.Loader.getResultSet(Loader.java:1953) 
    at org.hibernate.loader.Loader.doQuery(Loader.java:802) 
    at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:274) 
    at org.hibernate.loader.Loader.doList(Loader.java:2542) 
    ... 27 more

問題：我不明白爲什麼我得到這個錯誤。如果你認爲你可以提出什麼問題，請做好。

（N.B.如果您需要更多詳細信息，請告訴我）。

來源

2012-07-16 artaxerxe

您檢查過PostgreSQL日誌嗎？當您的應用程序遇到錯誤時，它們是否會在同一時間顯示任何可疑內容？ – Olaf 2012-07-16 12:41:34

PostgreSQL的日誌應該告訴更多，但你可能會耗盡

連接。在postgresql.conf中檢查max-connections。 Link to doc for 9.1
內存不足，殺手殺死你的連接。 Link to doc for 9.1和article on PostgreSQL memory management and linux

來源

2013-04-03 04:24:12

我的問題是有關的連接，如@BGR建議。有一個連接創建了一個連接（EntityManager,休眠），並忘記了close()它。經過一段時間 - 因爲該函數被稱爲相對頻繁 - 我的配置文件中指定的最大連接數已經填滿，並導致該行爲。

來源

2013-04-03 05:41:00 artaxerxe

Hibernate和Apache Tomcat問題

回答

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