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休眠findById（）問題

2015-10-20 201 views
0

我在通過findbyId（）方法在休眠（不總是）的任何Crud操作期間出現問題;並且意外出現（在任何不確定的時間，提高問題的機率爲10％）。 但重新加載頁面後（再次從瀏覽器發送請求）它獲得所需的數據;沒有任何問題。休眠findById（）問題

I have checked with all methods of hibernate(4.1.7) for findById such as get(), load(), byId.load(), criteria, but invain. 
given my testing code snippet: 

public SurveyDefination findById(final long sdId) throws HibernateException { 
     /* 
     * Session session1 = HibernateUtil.getSessionFactory().openSession(); 
     * session1.beginTransaction(); 
     */ 
     Criteria criteria = session.createCriteria(SurveyDefination.class).add(
       Restrictions.idEq(sdId)); 
     SurveyDefination surveyDefination = (SurveyDefination) criteria 
       .uniqueResult(); 

     if (surveyDefination == null) { 
      int count = 0; 
      System.out 
        .println("Before------surveyDefination--------Output --------- :: " 
          + count++ + ": " + surveyDefination); 
     // session.evict(surveyDefination); 
      if (surveyDefination == null && count == 1) { 
       surveyDefination = (SurveyDefination) session.get(
         SurveyDefination.class, sdId); 
       System.out 
         .println("Before------surveyDefination--------Output -----get()---- :: " 
           + count++ + ": " + surveyDefination); 
      } 
      if (surveyDefination == null) 
       try { 
        surveyDefination = (SurveyDefination) session.load(
          SurveyDefination.class, sdId); 
        System.out 
          .println("Before------surveyDefination--------Output -----load()---- :: " 
            + count++ + ": " + surveyDefination); 
       } catch (HibernateException e) { 
        logger.error(e.getMessage() + " ObjectNotFoundException"); 
        e.printStackTrace(); 
       } 

      if (surveyDefination == null) { 
       surveyDefination = (SurveyDefination) session.byId(
         SurveyDefination.class).load(sdId); 
       logger.info("Before------surveyDefination--------Output -----byId().load()---- :: " 
         + count++ + ": " + surveyDefination); 
      } 

      if (surveyDefination == null) { 

       criteria = session.createCriteria(SurveyDefination.class).add(
         Restrictions.idEq(sdId)); 
       surveyDefination = (SurveyDefination) criteria.uniqueResult(); 
       System.out 
         .println("Before------surveyDefination--------Output -----createCriteria()---- :: " 
           + count++ + ": " + surveyDefination); 
      } 
     } 
     System.out 
       .println("After -----surveyDefination---------Output --------- :: " 
         + surveyDefination); 

     return surveyDefination; 
    } 


But after all checking if it gets null once, it will never get the result; 
but same request by resending immediately, desired output comes out. 

Following is the error from my console, plz give a reason for such issue. 

11:06:50,987 INFO [stdout] (http-localhost-127.0.0.1-8080-4) connection is idle true connection release count 2 

11:06:51,012 INFO [stdout] (http-localhost-127.0.0.1-8080-4) Before------surveyDefination--------Output --------- :: 0: null 

11:06:51,018 INFO [stdout] (http-localhost-127.0.0.1-8080-4) Before------surveyDefination--------Output -----get()---- :: 1: null 

11:06:51,027 ERROR [stderr] (http-localhost-127.0.0.1-8080-4) org.hibernate.ObjectNotFoundException: No row with the given identifier exists: [com.ttn.survey.model.SurveyDefination#322] 

11:06:51,027 ERROR [stderr] (http-localhost-127.0.0.1-8080-4) at org.hibernate.internal.SessionFactoryImpl$1$1.handleEntityNotFound(SessionFactoryImpl.java:242) 

11:06:51,028 ERROR [stderr] (http-localhost-127.0.0.1-8080-4) at org.hibernate.proxy.AbstractLazyInitializer.checkTargetState(AbstractLazyInitializer.java:248) 

11:06:51,028 ERROR [stderr] (http-localhost-127.0.0.1-8080-4) at org.hibernate.proxy.AbstractLazyInitializer.initialize(AbstractLazyInitializer.java:176) 

11:06:51,029 ERROR [stderr] (http-localhost-127.0.0.1-8080-4) at org.hibernate.proxy.AbstractLazyInitializer.getImplementation(AbstractLazyInitializer.java:272) 

11:06:51,029 ERROR [stderr] (http-localhost-127.0.0.1-8080-4) at org.hibernate.proxy.pojo.javassist.JavassistLazyInitializer.invoke(JavassistLazyInitializer.java:185) 

11:06:51,030 ERROR [stderr] (http-localhost-127.0.0.1-8080-4) at com.ttn.survey.model.SurveyDefination_$$_javassist_95.toString(SurveyDefination_$$_javassist_95.java) 

11:06:51,030 ERROR [stderr] (http-localhost-127.0.0.1-8080-4) at java.lang.String.valueOf(String.java:2847) 

11:06:51,030 ERROR [stderr] (http-localhost-127.0.0.1-8080-4) at java.lang.StringBuilder.append(StringBuilder.java:128) 

11:06:51,031 ERROR [stderr] (http-localhost-127.0.0.1-8080-4) at com.ttn.survey.controller.implementations.dao.SurveyDefinationDAOImpl.findById(SurveyDefinationDAOImpl.java:132) 

11:06:51,031 ERROR [stderr] (http-localhost-127.0.0.1-8080-4) at com.ttn.survey.controller.implementations.client.ClientSurveyActionImpl.findSurveyInfoById(ClientSurveyActionImpl.java:213) 

11:06:51,032 ERROR [stderr] (http-localhost-127.0.0.1-8080-4) at com.ttn.survey.view.client.SurveyControllerServlet.doGet(SurveyControllerServlet.java:199) 

11:06:51,032 ERROR [stderr] (http-localhost-127.0.0.1-8080-4) at javax.servlet.http.HttpServlet.service(HttpServlet.java:734) 

11:06:51,032 ERROR [stderr] (http-localhost-127.0.0.1-8080-4) at javax.servlet.http.HttpServlet.service(HttpServlet.java:847) 

11:06:51,033 ERROR [stderr] (http-localhost-127.0.0.1-8080-4) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:329) 

11:06:51,033 ERROR [stderr] (http-localhost-127.0.0.1-8080-4) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:248) 

11:06:51,034 ERROR [stderr] (http-localhost-127.0.0.1-8080-4) at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:840) 

11:06:51,034 ERROR [stderr] (http-localhost-127.0.0.1-8080-4) at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:622) 

11:06:51,034 ERROR [stderr] (http-localhost-127.0.0.1-8080-4) at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:560) 

11:06:51,035 ERROR [stderr] (http-localhost-127.0.0.1-8080-4) at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:488) 

11:06:51,035 ERROR [stderr] (http-localhost-127.0.0.1-8080-4) at org.tuckey.web.filters.urlrewrite.NormalRewrittenUrl.doRewrite(NormalRewrittenUrl.java:213) 

11:06:51,036 ERROR [stderr] (http-localhost-127.0.0.1-8080-4) at org.tuckey.web.filters.urlrewrite.RuleChain.handleRewrite(RuleChain.java:171) 

11:06:51,036 ERROR [stderr] (http-localhost-127.0.0.1-8080-4) at org.tuckey.web.filters.urlrewrite.RuleChain.doRules(RuleChain.java:145) 

11:06:51,037 ERROR [stderr] (http-localhost-127.0.0.1-8080-4) at org.tuckey.web.filters.urlrewrite.UrlRewriter.processRequest(UrlRewriter.java:92) 

11:06:51,037 ERROR [stderr] (http-localhost-127.0.0.1-8080-4) at org.tuckey.web.filters.urlrewrite.UrlRewriteFilter.doFilter(UrlRewriteFilter.java:394) 

11:06:51,037 ERROR [stderr] (http-localhost-127.0.0.1-8080-4) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:280) 

11:06:51,038 ERROR [stderr] (http-localhost-127.0.0.1-8080-4) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:248) 

11:06:51,038 ERROR [stderr] (http-localhost-127.0.0.1-8080-4) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:275) 

11:06:51,039 ERROR [stderr] (http-localhost-127.0.0.1-8080-4) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:161) 

11:06:51,039 ERROR [stderr] (http-localhost-127.0.0.1-8080-4) at org.jboss.as.web.security.SecurityContextAssociationValve.invoke(SecurityContextAssociationValve.java:153) 

11:06:51,039 ERROR [stderr] (http-localhost-127.0.0.1-8080-4) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:155) 

11:06:51,040 ERROR [stderr] (http-localhost-127.0.0.1-8080-4) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102) 

11:06:51,041 ERROR [stderr] (http-localhost-127.0.0.1-8080-4) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109) 

11:06:51,041 ERROR [stderr] (http-localhost-127.0.0.1-8080-4) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:368) 

11:06:51,042 ERROR [stderr] (http-localhost-127.0.0.1-8080-4) at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:877) 

11:06:51,042 ERROR [stderr] (http-localhost-127.0.0.1-8080-4) at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:671) 

11:06:51,043 ERROR [stderr] (http-localhost-127.0.0.1-8080-4) at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:930) 

11:06:51,043 ERROR [stderr] (http-localhost-127.0.0.1-8080-4) at java.lang.Thread.run(Thread.java:745) 

11:06:51,043 ERROR [stderr] (http-localhost-127.0.0.1-8080-4) org.hibernate.ObjectNotFoundException: No row with the given identifier exists: [com.ttn.survey.model.SurveyDefination#322] 

11:06:51,044 ERROR [stderr] (http-localhost-127.0.0.1-8080-4) at org.hibernate.internal.SessionFactoryImpl$1$1.handleEntityNotFound(SessionFactoryImpl.java:242) 

11:06:51,044 ERROR [stderr] (http-localhost-127.0.0.1-8080-4) at org.hibernate.proxy.AbstractLazyInitializer.checkTargetState(AbstractLazyInitializer.java:248) 

11:06:51,045 ERROR [stderr] (http-localhost-127.0.0.1-8080-4) at org.hibernate.proxy.AbstractLazyInitializer.initialize(AbstractLazyInitializer.java:180) 

11:06:51,045 ERROR [stderr] (http-localhost-127.0.0.1-8080-4) at org.hibernate.proxy.AbstractLazyInitializer.getImplementation(AbstractLazyInitializer.java:272) 

11:06:51,046 ERROR [stderr] (http-localhost-127.0.0.1-8080-4) at org.hibernate.proxy.pojo.javassist.JavassistLazyInitializer.invoke(JavassistLazyInitializer.java:185) 

11:06:51,046 ERROR [stderr] (http-localhost-127.0.0.1-8080-4) at com.ttn.survey.model.SurveyDefination_$$_javassist_95.toString(SurveyDefination_$$_javassist_95.java) 

11:06:51,047 ERROR [stderr] (http-localhost-127.0.0.1-8080-4) at java.lang.String.valueOf(String.java:2847) 

11:06:51,047 ERROR [stderr] (http-localhost-127.0.0.1-8080-4) at java.lang.StringBuilder.append(StringBuilder.java:128) 

11:06:51,047 ERROR [stderr] (http-localhost-127.0.0.1-8080-4) at com.ttn.survey.controller.implementations.dao.SurveyDefinationDAOImpl.findById(SurveyDefinationDAOImpl.java:157) 

11:06:51,048 ERROR [stderr] (http-localhost-127.0.0.1-8080-4) at com.ttn.survey.controller.implementations.client.ClientSurveyActionImpl.findSurveyInfoById(ClientSurveyActionImpl.java:213) 

11:06:51,048 ERROR [stderr] (http-localhost-127.0.0.1-8080-4) at com.ttn.survey.view.client.SurveyControllerServlet.doGet(SurveyControllerServlet.java:199) 

11:06:51,049 ERROR [stderr] (http-localhost-127.0.0.1-8080-4) at javax.servlet.http.HttpServlet.service(HttpServlet.java:734) 

11:06:51,049 ERROR [stderr] (http-localhost-127.0.0.1-8080-4) at javax.servlet.http.HttpServlet.service(HttpServlet.java:847) 

11:06:51,049 ERROR [stderr] (http-localhost-127.0.0.1-8080-4) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:329) 

11:06:51,050 ERROR [stderr] (http-localhost-127.0.0.1-8080-4) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:248) 

11:06:51,050 ERROR [stderr] (http-localhost-127.0.0.1-8080-4) at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:840) 

11:06:51,051 ERROR [stderr] (http-localhost-127.0.0.1-8080-4) at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:622) 

11:06:51,051 ERROR [stderr] (http-localhost-127.0.0.1-8080-4) at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:560) 

11:06:51,051 ERROR [stderr] (http-localhost-127.0.0.1-8080-4) at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:488) 

11:06:51,052 ERROR [stderr] (http-localhost-127.0.0.1-8080-4) at org.tuckey.web.filters.urlrewrite.NormalRewrittenUrl.doRewrite(NormalRewrittenUrl.java:213) 

11:06:51,052 ERROR [stderr] (http-localhost-127.0.0.1-8080-4) at org.tuckey.web.filters.urlrewrite.RuleChain.handleRewrite(RuleChain.java:171) 

11:06:51,053 ERROR [stderr] (http-localhost-127.0.0.1-8080-4) at org.tuckey.web.filters.urlrewrite.RuleChain.doRules(RuleChain.java:145) 

11:06:51,053 ERROR [stderr] (http-localhost-127.0.0.1-8080-4) at org.tuckey.web.filters.urlrewrite.UrlRewriter.processRequest(UrlRewriter.java:92) 

11:06:51,054 ERROR [stderr] (http-localhost-127.0.0.1-8080-4) at org.tuckey.web.filters.urlrewrite.UrlRewriteFilter.doFilter(UrlRewriteFilter.java:394) 

11:06:51,054 ERROR [stderr] (http-localhost-127.0.0.1-8080-4) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:280) 

11:06:51,054 ERROR [stderr] (http-localhost-127.0.0.1-8080-4) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:248) 

11:06:51,055 ERROR [stderr] (http-localhost-127.0.0.1-8080-4) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:275) 

11:06:51,055 ERROR [stderr] (http-localhost-127.0.0.1-8080-4) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:161) 

11:06:51,056 ERROR [stderr] (http-localhost-127.0.0.1-8080-4) at org.jboss.as.web.security.SecurityContextAssociationValve.invoke(SecurityContextAssociationValve.java:153) 

11:06:51,057 ERROR [stderr] (http-localhost-127.0.0.1-8080-4) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:155) 

11:06:51,058 ERROR [stderr] (http-localhost-127.0.0.1-8080-4) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102) 

11:06:51,058 ERROR [stderr] (http-localhost-127.0.0.1-8080-4) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109) 

11:06:51,059 ERROR [stderr] (http-localhost-127.0.0.1-8080-4) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:368) 

11:06:51,059 ERROR [stderr] (http-localhost-127.0.0.1-8080-4) at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:877) 

11:06:51,059 ERROR [stderr] (http-localhost-127.0.0.1-8080-4) at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:671) 

11:06:51,060 ERROR [stderr] (http-localhost-127.0.0.1-8080-4) at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:930) 

11:06:51,060 ERROR [stderr] (http-localhost-127.0.0.1-8080-4) at java.lang.Thread.run(Thread.java:745)

來源

2015-10-20 Debajyoti Mohanty

+0

它可能是數據綁定問題（來自管理會話），還不確定。 –

回答

0

與此

surveyDefination = (SurveyDefination) session.load(
          SurveyDefination.class, sdId);

的問題不能加載不存在與負載持續（）方法。所以，你在此獲得SurveyDefination的的toString（）的異常（如我想，因爲你不提供行號）

System.out.println("Before------surveyDefination--------Output 
-----load()---- :: " + count++ + ": " + surveyDefination);

附：如果你想看看使用Hibernate的一些技巧，你可以看到它here

來源

2015-10-20 08:52:37

+0

謝謝你的回覆。是的，我同意你的意見。但我的問題是，重新加載頁面後，它如何獲得數據？我猜有時它不綁定數據，以便發生這樣的問題，但刷新/重新發送相同的請求後，它會得到正確的輸出......如何？ –

+0

@DebajyotiMohanty我認爲這個代碼沒有問題，但與其他部分（注入會話，交易等）。 –

+0

感謝@ v.ladynev你的建議。我認爲問題可能與會話操作有關;因爲我得到（「sdId」）價值，我推入我的方法findById（最終長期sdId）。 此（「sdId」）值不爲空（來自瀏覽器）。在我做任何會話操作後，發生了一些事情，我的對象（「surveyDefination」）變爲空（它很少發生並不總是）。這就是爲什麼我在這裏完全困惑。 無論如何再次感謝您的信息。仍然希望得到確切的問題原因。 –

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