Liferay:找不到合适的司机

时间:2012-06-01 14:32:29

标签: java oracle jdbc liferay

对于我当前的任务,我必须在liferay门户中部署我们的应用程序。部署本身是成功的,但是当应用程序启动时,会抛出“No suitable driver”异常。

环境:

  • Oracle 10g Express
  • Hibernate 4 Final
  • Liferay 6与Tomcat 7
  • OJDBC 6
  • c3p0 0.9
  • 使用maven构建

我们的应用程序的旧.war文件运行没有任何例外。但是,环境存在一些细微差别。

旧环境:

  • Oracle 10g Express
  • Hibernate 3 Final
  • Liferay 6与Tomcat 7
  • OJDBC 14
  • Hibernate构建连接池
  • 没有maven的构建

我已经尝试过的事情:

  • 将ojdbc.jar从webapp lib文件夹移动到liferay tomcat lib / ext文件夹
  • 在context.xml中强制执行“类加载器的”webapp classes / libs / resources“行为:
  • 删除c3p0再次使用ojdbc14(我认为可能是由ojdbc6引起的)
  • 在旧构建中使用ojdbc6交换ojdbc14(它可以正常工作)

新的persistence.xml:

<persistence-unit name="ipointdefault">
<provider>org.hibernate.ejb.HibernatePersistence</provider>
<mapping-file>META-INF/hbm.xml</mapping-file>
<class>Entity declaration...</class>
<properties>
    <property name="javax.persistence.jdbc.driver" value="oracle.jdbc.driver.OracleDriver" />
    <property name="javax.persistence.jdbc.url" value="jdbc:oracle:thin:@HOST:PORT:DB" />
    <property name="javax.persistence.jdbc.user" value="user" />
    <property name="javax.persistence.jdbc.password" value="pw" />
    <property name="hibernate.hbm2ddl.auto" value="update" />

    <property name="hibernate.dialect" value="org.hibernate.dialect.Oracle10gDialect" />
    <property name="hibernate.archive.autodetection" value="class" />
    <property name="hibernate.current_session_context_class" value="thread" />
    <property name="hibernate.connection.pool_size" value="10" />
    <property name="hibernate.cache.provider_class" value="org.hibernate.cache.NoCacheProvider" />
    <property name="hibernate.bytecode.use_reflection_optimizer" value="true" />
    <property name="hibernate.c3p0.acquire_increment" value="3" />
    <property name="hibernate.c3p0.min_size" value="3" />
    <property name="hibernate.c3p0.max_size" value="5" />
    <property name="hibernate.c3p0.timeout" value="10800" />
    <property name="hibernate.c3p0.idleConnectionTestPeriod" value="1800" />
    <property name="hibernate.c3p0.max_statements" value="0" />
</properties>

旧的persistence.xml:

<persistence-unit name="ipointdefault">
<provider>org.hibernate.ejb.HibernatePersistence</provider>
<class>Entity declaration...</class>
<properties>
    <property name="javax.persistence.jdbc.driver" value="oracle.jdbc.driver.OracleDriver" />
    <property name="javax.persistence.jdbc.url" value="jdbc:oracle:thin:@HOST:PORT:DB" />
    <property name="javax.persistence.jdbc.user" value="user" />
    <property name="javax.persistence.jdbc.password" value="pw" />
    <property name="hibernate.default-access" value="property" />
    <property name="hibernate.hbm2ddl.auto" value="update" />
    <property name="hibernate.dialect" value="org.hibernate.dialect.Oracle10gDialect" />
    <property name="hibernate.archive.autodetection" value="class" />
    <property name="hibernate.current_session_context_class" value="thread" />
    <property name="hibernate.connection.pool_size" value="10" />
    <property name="hibernate.cache.provider_class" value="org.hibernate.cache.NoCacheProvider" />
    <property name="hibernate.bytecode.use_reflection_optimizer" value="true" />
</properties>

您是否知道如何解决问题或找到根本原因?

提前致谢。

编辑:

堆栈跟踪:

java.sql.SQLException: No suitable driver
    at java.sql.DriverManager.getDriver(DriverManager.java:264)
    at com.mchange.v2.c3p0.DriverManagerDataSource.driver(DriverManagerDataSource.java:224)
    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)

1 个答案:

答案 0 :(得分:5)

经过三天的调试后,我终于找到了解决方案:

在某些情况下,histencenate / c3p0会忽略persistence.xml中的给定驱动程序类,并且由于这种情况 - 就像异常状态一样 - 找不到合适的驱动程序。为了防止这种情况,我将以下行添加到我的c3p0-config.xml中:

<property name="driverClass">oracle.jdbc.driver.OracleDriver</property>

我希望它也有助于其他人: - )