Question

我正在使用Hibernate 4.3.5我正在尝试连接到数据库（Oracle）我尝试了与c3p0-0.9.1的连接池。

我已设置以下属性以启用与c3p0-0.9.1的连接池。

  <property  name="connection.provider_class">org.hibernate.connection.C3P0ConnectionProvider</property>         
  <property name="hibernate.c3p0.min_size">0</property>
  <property name="hibernate.c3p0.max_size">5</property>
  <property name="hibernate.c3p0.timeout">300</property>
  <property name="hibernate.c3p0.max_statements">0</property>
  <property name="hibernate.c3p0.idle_test_period">300</property>

设置这些属性后，下面的信息将被记录，我无法连接到数据库。

     09:58:39,573  INFO MLog:80 - MLog clients using log4j logging.
     09:58:39,698  INFO C3P0Registry:204 - Initializing c3p0-0.9.1 [built 16-January-2007 14:46:42; debug? true; trace: 10]
     09:58:39,854  INFO AbstractPoolBackedDataSource:462 - Initializing c3p0 pool...  com.mchange.v2.c3p0.PoolBackedDataSource@7eaf7e [ connectionPoolDataSource -> com.mchange.v2.c3p0.WrapperConnectionPoolDataSource@6e3303f6 [ acquireIncrement -> 3, acquireRetryAttempts -> 30, acquireRetryDelay -> 1000, autoCommitOnClose -> false, automaticTestTable -> null, breakAfterAcquireFailure -> false, checkoutTimeout -> 0, connectionCustomizerClassName -> null, connectionTesterClassName -> com.mchange.v2.c3p0.impl.DefaultConnectionTester, debugUnreturnedConnectionStackTraces -> false, factoryClassLocation -> null, forceIgnoreUnresolvedTransactions -> false, 
   identityToken -> 2xstr79341a29wl20dow|45ef76, idleConnectionTestPeriod -> 300,  initialPoolSize -> 5, maxAdministrativeTaskTime -> 0, maxConnectionAge -> 0, maxIdleTime -> 100, maxIdleTimeExcessConnections -> 0, maxPoolSize -> 10, maxStatements -> 0, maxStatementsPerConnection -> 0, minPoolSize -> 5, nestedDataSource ->  com.mchange.v2.c3p0.DriverManagerDataSource@f55211aa [ description -> null, 
     driverClass -> null,  factoryClassLocation -> null, identityToken ->  2xstr79341a29wl20dow|16d0064, jdbcUrl ->  `**Driver URL**`, properties -> {user=******, password=******} ],  preferredTestQuery -> null, propertyCycle -> 0, testConnectionOnCheckin -> false,  testConnectionOnCheckout -> false,   unreturnedConnectionTimeout -> 0,  usesTraditionalReflectiveProxies -> false; userOverrides: {} ], dataSourceName -> null,     factoryClassLocation -> null, identityToken -> 2xstr79341a29wl20dow|11400c8, numHelperThreads -> 3 ]
         09:58:59,854  WARN ThreadPoolAsynchronousRunner:608 -  com.mchange.v2.async.ThreadPoolAsynchronousRunner$DeadlockDetector@13780ae -- APPARENT DEADLOCK!!! Creating emergency threads for unassigned pending tasks!
         09:58:59,854  WARN ThreadPoolAsynchronousRunner:624 -    com.mchange.v2.async.ThreadPoolAsynchronousRunner$DeadlockDetector@13780ae -- APPARENT   DEADLOCK!!!     
    Complete Status: 
    Managed Threads: 3
    Active Threads: 3
    Active Tasks: 
      com.mchange.v2.resourcepool.BasicResourcePool$AcquireTask@1e105a1 (com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread-#0)
      com.mchange.v2.resourcepool.BasicResourcePool$AcquireTask@389632 (com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread-#2)
      com.mchange.v2.resourcepool.BasicResourcePool$AcquireTask@10cd3b6 (com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread-#1)
Pending Tasks: 
      com.mchange.v2.resourcepool.BasicResourcePool$AcquireTask@11f5d8c
      com.mchange.v2.resourcepool.BasicResourcePool$AcquireTask@36b8db
       Pool thread stack traces:
          Thread[com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread-#0,5,main]
          java.lang.Thread.sleep(Native Method)
        com.mchange.v2.resourcepool.BasicResourcePool$AcquireTask.run(BasicResourcePool.java:1805)
    com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread.run(ThreadPoolAsynchronousRunner.java:547)
     Thread[com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread-#2,5,main]
     java.lang.Thread.sleep(Native Method)
     com.mchange.v2.resourcepool.BasicResourcePool$AcquireTask.run(BasicResourcePool.java:1805)
    com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread.run(ThreadPoolAsynchronousRunner.java:547)
        Thread[com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread-#1,5,main]
        java.lang.Thread.sleep(Native Method)
       com.mchange.v2.resourcepool.BasicResourcePool$AcquireTask.run(BasicResourcePool.java:1805)
    com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread.run(ThreadPoolAsynchronousRunner.java:547)

在这个可怕的日志记录后，我得到了以下异常

     09:59:18,135  WARN BasicResourcePool:1841 - com.mchange.v2.resourcepool.BasicResourcePool$AcquireTask@10cd3b6 -- Acquisition Attempt Failed!!! Clearing pending acquires. While trying to acquire a needed new resource, we failed to succeed more than the maximum number of allowed acquisition attempts (30). Last acquisition attempt exception: 
                java.sql.SQLException: ORA-01017: invalid username/password; logon denied

                       at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:112)
                       at oracle.jdbc.driver.T4CTTIoer.processError(T4CTTIoer.java:331)
                       at oracle.jdbc.driver.T4CTTIoer.processError(T4CTTIoer.java:283)
                       at oracle.jdbc.driver.T4CTTIoer.processError(T4CTTIoer.java:278)
                       at oracle.jdbc.driver.T4CTTIoauthenticate.receiveOauth(T4CTTIoauthenticate.java:785)
                       at oracle.jdbc.driver.T4CConnection.logon(T4CConnection.java:362)
                       at oracle.jdbc.driver.PhysicalConnection.<init>(PhysicalConnection.java:414)
                       at oracle.jdbc.driver.T4CConnection.<init>(T4CConnection.java:165)
                       at oracle.jdbc.driver.T4CDriverExtension.getConnection(T4CDriverExtension.java:35)
                        at oracle.jdbc.driver.OracleDriver.connect(OracleDriver.java:801)
                       at com.mchange.v2.c3p0.DriverManagerDataSource.getConnection(DriverManagerDataSource.java:135)
                       at com.mchange.v2.c3p0.WrapperConnectionPoolDataSource.getPooledConnection(WrapperConnectionPoolDataSource.java:182)
                       at com.mchange.v2.c3p0.WrapperConnectionPoolDataSource.getPooledConnection(WrapperConnectionPoolDataSource.java:171)
                       at com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool$1PooledConnectionResourcePoolManager.acquireResource(C3P0PooledConnectionPool.java:137)
                       at com.mchange.v2.resourcepool.BasicResourcePool.doAcquire(BasicResourcePool.java:1014)
                       at com.mchange.v2.resourcepool.BasicResourcePool.access$800(BasicResourcePool.java:32)
                       at com.mchange.v2.resourcepool.BasicResourcePool$AcquireTask.run(BasicResourcePool.java:1810)
                       at com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread.run(ThreadPoolAsynchronousRunner.java:547)
        HibernateLog --> 09:59:18 WARN  org.hibernate.engine.jdbc.spi.SqlExceptionHelper - SQL  Error: 0, SQLState: null
       09:59:18,135  WARN SqlExceptionHelper:144 - SQL Error: 0, SQLState: null
       HibernateLog --> 09:59:18 ERROR org.hibernate.engine.jdbc.spi.SqlExceptionHelper - Connections could not be acquired from the underlying database!
       09:59:18,135 ERROR SqlExceptionHelper:146 - Connections could not be acquired from the underlying database!
       09:59:18,135 ERROR LoginDAO:111 - GetHostAddrCould not open connection
      org.hibernate.exception.GenericJDBCException: Could not open connection
           at   org.hibernate.exception.internal.StandardSQLExceptionConverter.convert(StandardSQLExceptionConverter.java:54)
           at org.hibernate.engine.jdbc.spi.SqlExceptionHelper.convert(SqlExceptionHelper.java:126)
           at org.hibernate.engine.jdbc.spi.SqlExceptionHelper.convert(SqlExceptionHelper.java:112)
           at  org.hibernate.engine.jdbc.internal.LogicalConnectionImpl.obtainConnection(LogicalConnectionImpl.java:235)
           at org.hibernate.engine.jdbc.internal.LogicalConnectionImpl.getConnection(LogicalConnectionImpl.java:171)
           at org.hibernate.engine.jdbc.internal.StatementPreparerImpl.connection(StatementPreparerImpl.java:63)
            at org.hibernate.engine.jdbc.internal.StatementPreparerImpl$5.doPrepare(StatementPreparerImpl.java:162)
            at org .hibernate.engine.jdbc.internal.StatementPreparerImpl$StatementPreparationTemplate.prepareStatement(StatementPreparerImpl.java:186)
            at  org.hibernate.engine.jdbc.internal.StatementPreparerImpl.prepareQueryStatement(StatementPreparerImpl.java:160)
           at org.hibernate.loader.Loader.prepareQueryStatement(Loader.java:1884)
           at org.hibernate.loader.Loader.executeQueryStatement(Loader.java:1861)
           at org.hibernate.loader.Loader.executeQueryStatement(Loader.java:1838)
           at org.hibernate.loader.Loader.doQuery(Loader.java:909)
           at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:354)
           at org.hibernate.loader.Loader.doList(Loader.java:2553)
           at org.hibernate.loader.Loader.doList(Loader.java:2539)
            at org.hibernate.loader.Loader.listIgnoreQueryCache(Loader.java:2369)
           at org.hibernate.loader.Loader.list(Loader.java:2364)
           at org.hibernate.loader.criteria.CriteriaLoader.list(CriteriaLoader.java:126)
           at org.hibernate.internal.SessionImpl.list(SessionImpl.java:1682)
           at org.hibernate.internal.CriteriaImpl.list(CriteriaImpl.java:380)

**这里数据库的用户名和密码绝对正确**

在此异常之后，我无法连接到数据库但在我的日志中我的应用程序正在尝试连接到数据库，因为我可以在我的控制台中看到相同类型的日志记录。

以下是我的配置。

        c3p0-0.9.1.jar
        Hibernate-c3p0-4.3.5.Final.jar
        Struts2 -fullhibernatecoreplugin-2.2.2-GA.jar

我正在使用struts2和Hibernate 4.3.5。有人可以帮我这个。我googles alto但无法找到合适的VIVID解决方案。

Ans我可以连接到数据库，如果我不使用与c3p0

的连接池，我的应用程序运行良好

提前致谢。

编辑：** 我正在使用混合属性配置hibernate就像我通过java程序传递用户名和密码一样。 **我的愚蠢猜测是c3p0没有找到由java程序设置的用户名和密码，因为我尝试了这个连接池与示例控制台java程序在哪里我可以连接到DB即使我得到登录拒绝例外

这里我需要以编程方式设置用户名和密码，有没有办法摆脱这个？。

Answer 1

我建议您像Hibernate一样提供自己的C3P0数据源：

以编程方式创建C3P0数据源：

@org.springframework.context.annotation.Configuration
public class C3P0Configuration {

    @Bean
    public ComboPooledDataSource dataSource() {
        ComboPooledDataSource actualDataSource = new ComboPooledDataSource();
        actualDataSource.setJdbcUrl("set-your-url");
        actualDataSource.setUser("set-your-user");
        actualDataSource.setPassword("set-your-user");
        actualDataSource.setMinPoolSize(0);
        actualDataSource.setMaxPoolSize(5);
        return actualDataSource;
    }
}

您将dataSource传递给Hibernate SessionFactory：

<bean id="mySessionFactory" class="org.springframework.orm.hibernate3.LocalSessionFactoryBean" dependsOn="dataSource">
    <property name="dataSource" ref="dataSource"/>
    <property name="mappingResources">
        <list>
        <value>your-hibernate-config.hbm.xml</value>
        </list>
    </property>
    <property name="hibernateProperties">
        <value>
            hibernate.dialect=org.hibernate.dialect.Oracle10gDialect
        </value>
    </property>
</bean>

或者如果您以编程方式构建会话工厂，请确保提供此属性：

properties.put("hibernate.connection.datasource", dataSource);

如果不使用Spring，则必须能够访问会话工厂实例化过程，因为您需要在会话工厂之前构建数据源，以便将其作为上述Hibernate属性提供。

Hibernate 4.3.5 c3p0-0.9.1的问题

1 个答案: