PostgreSQL未釋放表中的鎖

Question

我們正在將我們的應用程序數據從Oracle遷移到PostgreSQL。

環境細節：
的Java 1.8
的PostgreSQL 9.5企業版（XA數據源）
的Hibernate 4.3
WildFly 9.0.2

我們正在利用最新的PostgreSQL驅動（PostgreSQL的，1212年4月9日。 （https://jdbc.postgresql.org/download.html）

編輯：也試過edb-jdbc17.ja r驅動程序，它附帶postgres企業數據庫。還是一樣的結果。

我們還在postgresql.conf文件中將max_prepared_connections設置爲100。

下面給出的方法是採用一個對象並使用hibernate啓動事務，然後提交事務。方法不會引發任何錯誤或異常。但是在數據庫中，對象沒有得到保存，應用程序正在獲取導致死鎖的表上的鎖。 相同的代碼與Oracle完美結合。從數據庫

public void createObject(Object obj) throws CSTransactionException { 
    Session s = null; 
    Transaction t = null; 
    try { 

     try { 
      obj = performEncrytionDecryption(obj, true); 
     } catch (EncryptionException e) { 
      throw new CSObjectNotFoundException(e); 
     } 


     try{ 
      obj = ObjectUpdater.trimObjectsStringFieldValues(obj); 
     }catch(Exception e){ 
      throw new CSObjectNotFoundException(e); 
     } 



     s = HibernateSessionFactoryHelper.getAuditSession(sf); 
     t = s.beginTransaction(); 
     s.save(obj); 
     t.commit(); 
     s.flush(); 
     auditLog.info("Creating the " + obj.getClass().getName().substring(obj.getClass().getName().lastIndexOf(".")+1) + " Object ");   
    } 
catch (PropertyValueException pve) 
    { 
     try { 
      t.rollback(); 
     } catch (Exception ex3) { 
      if (log.isDebugEnabled()) 
       log.debug("Authorization|||createObject|Failure|Error in Rolling Back Transaction|" + ex3.getMessage()); 
     } 
     if (log.isDebugEnabled()) 
      log 
        .debug("Authorization|||createObject|Failure|Error in Rolling Back Transaction|" + pve.getMessage()); 
     throw new CSTransactionException(
       "An error occured in creating the " + StringUtilities.getClassName(obj.getClass().getName()) + ".\n" + " A null value was passed for a required attribute " + pve.getMessage().substring(pve.getMessage().indexOf(":")), pve); 
    } 
    catch (ConstraintViolationException cve) 
    { 
     try { 
      t.rollback(); 
     } catch (Exception ex3) { 
      if (log.isDebugEnabled()) 
       log.debug("Authorization|||createObject|Failure|Error in Rolling Back Transaction|" + ex3.getMessage()); 
     } 
     if (log.isDebugEnabled()) 
      log 
        .debug("Authorization|||createObject|Failure|Error in Rolling Back Transaction|" + cve.getMessage()); 
     throw new CSTransactionException(
       "An error occured in creating the " + StringUtilities.getClassName(obj.getClass().getName()) + ".\n" + " Duplicate entry was found in the database for the entered data" , cve); 
    }  
    catch (Exception ex) { 
     log.error(ex); 
     try { 
      t.rollback(); 
     } catch (Exception ex3) { 
      if (log.isDebugEnabled()) 
       log 
         .debug("Authorization|||createObject|Failure|Error in Rolling Back Transaction|" 
           + ex3.getMessage()); 
     } 
     if (log.isDebugEnabled()) 
      log 
        .debug("Authorization|||createObject|Failure|Error in creating the " 
          + obj.getClass().getName() 
          + "|" 
          + ex.getMessage()); 
     throw new CSTransactionException(
       "An error occured in creating the " 
         + StringUtilities.getClassName(obj.getClass() 
           .getName()) + "\n" + ex.getMessage(), ex); 
    } finally { 
     try { 

      s.close(); 
     } catch (Exception ex2) { 
      if (log.isDebugEnabled()) 
       log 
         .debug("Authorization|||createObject|Failure|Error in Closing Session |" 
           + ex2.getMessage()); 
     } 
    } 
    if (log.isDebugEnabled()) 
     log 
       .debug("Authorization|||createObject|Success|Successful in creating the " 
         + obj.getClass().getName() + "|"); 
} 

鎖的信息：

Answer 1

你必須在提交之後（最好在finally塊）關閉會話：

s = HibernateSessionFactoryHelper.getAuditSession(sf); 
t = s.beginTransaction(); 
    try { 
      s.save(obj); 
      session.flush(); 
      session.clear(); 
      t.commit(); 
      auditLog.info("Creating the " + obj.getClass().getName().substring(obj.getClass().getName().lastIndexOf(".")+1) + " Object ");   
     }   
    }catch (Exception e) { 
     t.rollBack(); 
    }finally{ 
     s.close(); 
    }