7

当我将一个application.war包含 servlet 的服务器部署到我的 weblogic 服务器时，它运行良好。servlet 使用 的实例UniversalConnectionPoolManagerMBean并且启动时没有任何问题。

在管理控制台中，我使用“工作完成时停止”命令，并在我的destroy()方法中调用：

UniversalConnectionPoolManagerImpl.getUniversalConnectionPoolManager()
                .startConnectionPool(mConnectionPoolName);

然后，当我在管理控制台中单击“开始服务请求”命令时，出现此异常：

 java.sql.SQLException: Unable to start the Universal Connection Pool: java.sql.SQLException: Unable to start the Universal Connection Pool: oracle.ucp.UniversalConnectionPoolException: MBean exception occurred while registering or unregistering the MBean
at com.exzac.dal.jdbc.Database.getConnection(Database.java:134)
at com.exzac.dal.jdbc.Database.executeQuery(Database.java:161)
at com.exzac.profilesystem.ProfileSystemConfiguration.retrieveConfigurationTable(ProfileSystemConfiguration.java:214)
... 49 more
Caused by: java.sql.SQLException: Unable to start the Universal Connection Pool:     java.sql.SQLException: Unable to start the Universal Connection Pool: oracle.ucp.UniversalConnectionPoolException: MBean exception occurred while registering or unregistering the MBean
at oracle.ucp.util.UCPErrorHandler.newSQLException(UCPErrorHandler.java:541)
at oracle.ucp.jdbc.PoolDataSourceImpl.throwSQLException(PoolDataSourceImpl.java:587)
at oracle.ucp.jdbc.PoolDataSourceImpl.startPool(PoolDataSourceImpl.java:276)
at oracle.ucp.jdbc.PoolDataSourceImpl.getConnection(PoolDataSourceImpl.java:646)
at oracle.ucp.jdbc.PoolDataSourceImpl.getConnection(PoolDataSourceImpl.java:613)
at oracle.ucp.jdbc.PoolDataSourceImpl.getConnection(PoolDataSourceImpl.java:607)
at com.exzac.dal.jdbc.Database.getConnection(Database.java:132)
... 51 more
 Caused by: java.sql.SQLException: Unable to start the Universal Connection Pool: oracle.ucp.UniversalConnectionPoolException: MBean exception occurred while registering or unregistering the MBean
at oracle.ucp.util.UCPErrorHandler.newSQLException(UCPErrorHandler.java:541)
at oracle.ucp.jdbc.PoolDataSourceImpl.throwSQLException(PoolDataSourceImpl.java:587)
at oracle.ucp.jdbc.PoolDataSourceImpl.startPool(PoolDataSourceImpl.java:247)
... 55 more
 Caused by: oracle.ucp.UniversalConnectionPoolException: MBean exception occurred while registering or unregistering the MBean
at oracle.ucp.util.UCPErrorHandler.newUniversalConnectionPoolException(UCPErrorHandler.java:421)
at oracle.ucp.util.UCPErrorHandler.newUniversalConnectionPoolException(UCPErrorHandler.java:389)
at oracle.ucp.admin.UniversalConnectionPoolManagerMBeanImpl.getUniversalConnectionPoolManagerMBean(UniversalConnectionPoolManagerMBeanImpl.java:149)
at oracle.ucp.jdbc.PoolDataSourceImpl.startPool(PoolDataSourceImpl.java:242)
... 55 more
 Caused by: java.security.PrivilegedActionException: javax.management.InstanceAlreadyExistsException: oracle.ucp.admin:name=UniversalConnectionPoolManagerMBean
at java.security.AccessController.doPrivileged(Native Method)
at oracle.ucp.admin.UniversalConnectionPoolManagerMBeanImpl.getUniversalConnectionPoolManagerMBean(UniversalConnectionPoolManagerMBeanImpl.java:136)
... 56 more
 Caused by: javax.management.InstanceAlreadyExistsException: oracle.ucp.admin:name=UniversalConnectionPoolManagerMBean
at com.sun.jmx.mbeanserver.Repository.addMBean(Repository.java:453)
at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.internal_addObject(DefaultMBeanServerInterceptor.java:1484)
at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.registerDynamicMBean(DefaultMBeanServerInterceptor.java:963)
at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.registerObject(DefaultMBeanServerInterceptor.java:917)
at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.registerMBean(DefaultMBeanServerInterceptor.java:312)
at com.sun.jmx.mbeanserver.JmxMBeanServer.registerMBean(JmxMBeanServer.java:482)
at weblogic.management.jmx.mbeanserver.WLSMBeanServerInterceptorBase$27.run(WLSMBeanServerInterceptorBase.java:714)
at java.security.AccessController.doPrivileged(Native Method)
at weblogic.management.jmx.mbeanserver.WLSMBeanServerInterceptorBase.registerMBean(WLSMBeanServerInterceptorBase.java:709)
at weblogic.management.mbeanservers.internal.JMXContextInterceptor.registerMBean(JMXContextInterceptor.java:448)
at weblogic.management.jmx.mbeanserver.WLSMBeanServerInterceptorBase$27.run(WLSMBeanServerInterceptorBase.java:712)
at java.security.AccessController.doPrivileged(Native Method)
at weblogic.management.jmx.mbeanserver.WLSMBeanServerInterceptorBase.registerMBean(WLSMBeanServerInterceptorBase.java:709)
at weblogic.management.jmx.mbeanserver.WLSMBeanServer.registerMBean(WLSMBeanServer.java:462)
at oracle.ucp.admin.UniversalConnectionPoolManagerMBeanImpl$2.run(UniversalConnectionPoolManagerMBeanImpl.java:142)
... 58 more

从那时起，我遇到了这个异常，即使我停止服务器并重新启动并尝试部署。只有清理所有已发布的资源似乎才能清除异常。我知道在destroy方法中没有正确清理发布的资源，我认为资源是UniversalConnectionPoolManagerMBean实例，但我认为它会被方法清理destroyConnectionPool： http: //docs.oracle.com/cd/ B28359_01/java.111/e11990/oracle/ucp/admin/UniversalConnectionPoolManagerMBean.html#destroyConnectionPool_java_lang_String_

如何避免遇到此异常？

正如一个有趣（但不安全）的解决方法：由于某种原因，当我将其插入初始化时：

 try {
     UniversalConnectionPoolManagerImpl.getUniversalConnectionPoolManager().destroyConnectionPool(mConnectionPoolName);
     } catch (final Exception e1) {
     LOGGER.error(e1);

     }

抛出异常并捕获它说找不到connectionPool具有此名称的要销毁的，但是原始问题消失了。javax.management.InstanceAlreadyExistsException: oracle.ucp.admin:name=UniversalConnectionPoolManagerMBean不被抛出

4

2 回答 2

1

此错误似乎已在版本 11.2.0.4 和 12.1.0.2 中修复。我找不到任何关于它的文档，但对我来说，上述版本的错误消失了。

JDBC/UCP 下载页面： http ://www.oracle.com/technetwork/database/features/jdbc/index-091264.html

于 2015-03-25T08:46:55.000 回答
0

这是来自 Oracle 的 11.2.0.4 UCP.jar README.txt。

11.2.0.4 中的修复

16805157 UniversalConnectionPoolManagerMBean 的名称在每个类加载器中都是唯一的，因此即使在同一个 JVM 中，每个 UCP 实例也是唯一的

这修复了原始问题中描述的 javax.management.InstanceAlreadyExistsException 。创建的每个连接池都有一个唯一的名称，并且不会导致 InstanceAlreadyExistsException。但是，由于您正在重新启动，您应该考虑弄清楚如何干净地关闭连接池 MBean，这样您就不会遇到这个问题。

于 2017-05-16T20:27:25.103 回答