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java.sql.SQLException：可用連接總數小於關閉連接總數：WSO2 ESB 5.0.0：java.sql.SQLException：可用連接總數小於關閉連接總數：
我在部署由管理實例，兩個工作者實例和一個獨立服務器上的共享數據庫組成的WSO2 ESB集羣環境方面幾乎沒有麻煩。每個實例都在虛擬機箱虛擬機上。 我把每次收到以下異常我運行的服務器：
[2017-08-01 02:07:34,827] ERROR - RegistryUtils Failed to construct the connectionId.
java.sql.SQLException: PooledConnection has already been closed.
at org.apache.tomcat.jdbc.pool.DisposableConnectionFacade.invoke(DisposableConnectionFacade.java:86)
at com.sun.proxy.$Proxy18.getMetaData(Unknown Source)
at org.wso2.carbon.registry.core.utils.RegistryUtils.getConnectionId(RegistryUtils.java:194)
at org.wso2.carbon.registry.core.jdbc.dataaccess.JDBCDatabaseTransaction$ManagedRegistryConnection.getConnectionId(JDBCDatabaseTransaction.java:1133)
at org.wso2.carbon.registry.core.jdbc.dataaccess.JDBCDatabaseTransaction$ManagedRegistryConnection.commit(JDBCDatabaseTransaction.java:1212)
at org.wso2.carbon.registry.core.jdbc.dataaccess.JDBCTransactionManager.commitTransaction(JDBCTransactionManager.java:159)
at org.wso2.carbon.registry.core.jdbc.EmbeddedRegistry.commitTransaction(EmbeddedRegistry.java:452)
at org.wso2.carbon.registry.core.jdbc.EmbeddedRegistry.resourceExists(EmbeddedRegistry.java:658)
at org.wso2.carbon.registry.core.caching.CacheBackedRegistry.resourceExists(CacheBackedRegistry.java:376)
at org.wso2.carbon.registry.core.session.UserRegistry.resourceExistsInternal(UserRegistry.java:774)
at org.wso2.carbon.registry.core.session.UserRegistry.access$800(UserRegistry.java:61)
at org.wso2.carbon.registry.core.session.UserRegistry$9.run(UserRegistry.java:757)
at org.wso2.carbon.registry.core.session.UserRegistry$9.run(UserRegistry.java:754)
at java.security.AccessController.doPrivileged(Native Method)
at org.wso2.carbon.registry.core.session.UserRegistry.resourceExists(UserRegistry.java:754)
at org.wso2.carbon.registry.core.utils.MediaTypesUtils.getResourceMediaTypeMappings(MediaTypesUtils.java:342)
at org.wso2.carbon.registry.core.utils.RegistryUtils.setupMediaTypes(RegistryUtils.java:1145)
at org.wso2.carbon.registry.core.internal.RegistryCoreServiceComponent.buildRegistryService(RegistryCoreServiceComponent.java:533)
at org.wso2.carbon.registry.core.internal.RegistryCoreServiceComponent.activate(RegistryCoreServiceComponent.java:126)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.eclipse.equinox.internal.ds.model.ServiceComponent.activate(ServiceComponent.java:260)
at org.eclipse.equinox.internal.ds.model.ServiceComponentProp.activate(ServiceComponentProp.java:146)
at org.eclipse.equinox.internal.ds.model.ServiceComponentProp.build(ServiceComponentProp.java:345)
at org.eclipse.equinox.internal.ds.InstanceProcess.buildComponent(InstanceProcess.java:620)
at org.eclipse.equinox.internal.ds.InstanceProcess.buildComponents(InstanceProcess.java:197)
at org.eclipse.equinox.internal.ds.Resolver.getEligible(Resolver.java:343)
at org.eclipse.equinox.internal.ds.SCRManager.serviceChanged(SCRManager.java:222)
at org.eclipse.osgi.internal.serviceregistry.FilteredServiceListener.serviceChanged(FilteredServiceListener.java:107)
at org.eclipse.osgi.framework.internal.core.BundleContextImpl.dispatchEvent(BundleContextImpl.java:861)
at org.eclipse.osgi.framework.eventmgr.EventManager.dispatchEvent(EventManager.java:230)
at org.eclipse.osgi.framework.eventmgr.ListenerQueue.dispatchEventSynchronous(ListenerQueue.java:148)
at org.eclipse.osgi.internal.serviceregistry.ServiceRegistry.publishServiceEventPrivileged(ServiceRegistry.java:819)
at org.eclipse.osgi.internal.serviceregistry.ServiceRegistry.publishServiceEvent(ServiceRegistry.java:771)
at org.eclipse.osgi.internal.serviceregistry.ServiceRegistrationImpl.register(ServiceRegistrationImpl.java:130)
at org.eclipse.osgi.internal.serviceregistry.ServiceRegistry.registerService(ServiceRegistry.java:214)
at org.eclipse.osgi.framework.internal.core.BundleContextImpl.registerService(BundleContextImpl.java:433)
at org.wso2.carbon.user.core.internal.Activator.startDeploy(Activator.java:69)
at org.wso2.carbon.user.core.internal.BundleCheckActivator.start(BundleCheckActivator.java:61)
at org.eclipse.osgi.framework.internal.core.BundleContextImpl$1.run(BundleContextImpl.java:711)
at java.security.AccessController.doPrivileged(Native Method)
at org.eclipse.osgi.framework.internal.core.BundleContextImpl.startActivator(BundleContextImpl.java:702)
at org.eclipse.osgi.framework.internal.core.BundleContextImpl.start(BundleContextImpl.java:683)
at org.eclipse.osgi.framework.internal.core.BundleHost.startWorker(BundleHost.java:381)
at org.eclipse.osgi.framework.internal.core.AbstractBundle.resume(AbstractBundle.java:390)
at org.eclipse.osgi.framework.internal.core.Framework.resumeBundle(Framework.java:1176)
at org.eclipse.osgi.framework.internal.core.StartLevelManager.resumeBundles(StartLevelManager.java:559)
at org.eclipse.osgi.framework.internal.core.StartLevelManager.resumeBundles(StartLevelManager.java:544)
at org.eclipse.osgi.framework.internal.core.StartLevelManager.incFWSL(StartLevelManager.java:457)
at org.eclipse.osgi.framework.internal.core.StartLevelManager.doSetStartLevel(StartLevelManager.java:243)
at org.eclipse.osgi.framework.internal.core.StartLevelManager.dispatchEvent(StartLevelManager.java:438)
at org.eclipse.osgi.framework.internal.core.StartLevelManager.dispatchEvent(StartLevelManager.java:1)
at org.eclipse.osgi.framework.eventmgr.EventManager.dispatchEvent(EventManager.java:230)
at org.eclipse.osgi.framework.eventmgr.EventManager$EventThread.run(EventManager.java:340)
[2017-08-01 02:07:34,829] ERROR - RegistryUtils Failed to construct the connectionId.
java.sql.SQLException: PooledConnection has already been closed.
at org.apache.tomcat.jdbc.pool.DisposableConnectionFacade.invoke(DisposableConnectionFacade.java:86)
at com.sun.proxy.$Proxy18.getMetaData(Unknown Source)
at org.wso2.carbon.registry.core.utils.RegistryUtils.getConnectionId(RegistryUtils.java:194)
at org.wso2.carbon.registry.core.jdbc.dataaccess.JDBCDatabaseTransaction$ManagedRegistryConnection.getConnectionId(JDBCDatabaseTransaction.java:1133)
at org.wso2.carbon.registry.core.jdbc.dataaccess.JDBCDatabaseTransaction$ManagedRegistryConnection.commit(JDBCDatabaseTransaction.java:1238)
at org.wso2.carbon.registry.core.jdbc.dataaccess.JDBCTransactionManager.commitTransaction(JDBCTransactionManager.java:159)
at org.wso2.carbon.registry.core.jdbc.EmbeddedRegistry.commitTransaction(EmbeddedRegistry.java:452)
at org.wso2.carbon.registry.core.jdbc.EmbeddedRegistry.resourceExists(EmbeddedRegistry.java:658)
at org.eclipse.equinox.internal.ds.model.ServiceComponentProp.activate(ServiceComponentProp.java:146)
at org.eclipse.equinox.internal.ds.model.ServiceComponentProp.build(ServiceComponentProp.java:345)
at org.eclipse.equinox.internal.ds.InstanceProcess.buildComponent(InstanceProcess.java:620)
at org.eclipse.equinox.internal.ds.InstanceProcess.buildComponents(InstanceProcess.java:197)
at org.eclipse.equinox.internal.ds.Resolver.getEligible(Resolver.java:343)
at org.eclipse.equinox.internal.ds.SCRManager.serviceChanged(SCRManager.java:222)
at org.eclipse.osgi.internal.serviceregistry.FilteredServiceListener.serviceChanged(FilteredServiceListener.java:107)
at org.eclipse.osgi.framework.internal.core.BundleContextImpl.dispatchEvent(BundleContextImpl.java:861)
at org.eclipse.osgi.framework.eventmgr.EventManager.dispatchEvent(EventManager.java:230)
at org.eclipse.osgi.framework.eventmgr.ListenerQueue.dispatchEventSynchronous(ListenerQueue.java:148)
at org.eclipse.osgi.internal.serviceregistry.ServiceRegistry.publishServiceEventPrivileged(ServiceRegistry.java:819)
at org.eclipse.osgi.internal.serviceregistry.ServiceRegistry.publishServiceEvent(ServiceRegistry.java:771)
at org.eclipse.osgi.internal.serviceregistry.ServiceRegistrationImpl.register(ServiceRegistrationImpl.java:130)
at org.eclipse.osgi.internal.serviceregistry.ServiceRegistry.registerService(ServiceRegistry.java:214)
at org.eclipse.osgi.framework.internal.core.BundleContextImpl.registerService(BundleContextImpl.java:433)
at org.wso2.carbon.user.core.internal.Activator.startDeploy(Activator.java:69)
at org.wso2.carbon.user.core.internal.BundleCheckActivator.start(BundleCheckActivator.java:61)
at org.eclipse.osgi.framework.internal.core.BundleContextImpl$1.run(BundleContextImpl.java:711)
at java.security.AccessController.doPrivileged(Native Method)
at org.eclipse.osgi.framework.internal.core.BundleContextImpl.startActivator(BundleContextImpl.java:702)
at org.eclipse.osgi.framework.internal.core.BundleContextImpl.start(BundleContextImpl.java:683)
at org.eclipse.osgi.framework.internal.core.BundleHost.startWorker(BundleHost.java:381)
at org.eclipse.osgi.framework.internal.core.AbstractBundle.resume(AbstractBundle.java:390)
at org.eclipse.osgi.framework.internal.core.Framework.resumeBundle(Framework.java:1176)
at org.eclipse.osgi.framework.internal.core.StartLevelManager.resumeBundles(StartLevelManager.java:559)
at org.eclipse.osgi.framework.internal.core.StartLevelManager.resumeBundles(StartLevelManager.java:544)
at org.eclipse.osgi.framework.internal.core.StartLevelManager.incFWSL(StartLevelManager.java:457)
at org.eclipse.osgi.framework.internal.core.StartLevelManager.doSetStartLevel(StartLevelManager.java:243)
at org.eclipse.osgi.framework.internal.core.StartLevelManager.dispatchEvent(StartLevelManager.java:438)
at org.eclipse.osgi.framework.internal.core.StartLevelManager.dispatchEvent(StartLevelManager.java:1)
at org.eclipse.osgi.framework.eventmgr.EventManager.dispatchEvent(EventManager.java:230)
at org.eclipse.osgi.framework.eventmgr.EventManager$EventThread.run(EventManager.java:340)
[2017-08-01 02:07:35,064] ERROR - TransactionManager Failed to close transaction.
java.sql.SQLException: Total number of available connections are less than the total number of closed connections
at org.wso2.carbon.registry.core.jdbc.dataaccess.JDBCDatabaseTransaction$ManagedRegistryConnection.close(JDBCDatabaseTransaction.java:1360)
at org.wso2.carbon.registry.core.jdbc.dataaccess.JDBCTransactionManager.endTransaction(JDBCTransactionManager.java:178)
at org.wso2.carbon.registry.core.jdbc.dataaccess.JDBCTransactionManager.commitTransaction(JDBCTransactionManager.java:167)
at org.wso2.carbon.registry.core.jdbc.EmbeddedRegistry.commitTransaction(EmbeddedRegistry.java:452)
at org.wso2.carbon.registry.core.jdbc.EmbeddedRegistry.resourceExists(EmbeddedRegistry.java:658)
at org.wso2.carbon.registry.core.caching.CacheBackedRegistry.resourceExists(CacheBackedRegistry.java:376)
at org.wso2.carbon.registry.core.session.UserRegistry.resourceExistsInternal(UserRegistry.java:774)
at org.wso2.carbon.registry.core.session.UserRegistry.access$800(UserRegistry.java:61)
at org.wso2.carbon.registry.core.session.UserRegistry$9.run(UserRegistry.java:757)
at org.wso2.carbon.registry.core.session.UserRegistry$9.run(UserRegistry.java:754)
at java.security.AccessController.doPrivileged(Native Method)
at org.wso2.carbon.registry.core.session.UserRegistry.resourceExists(UserRegistry.java:754)
at org.wso2.carbon.registry.core.utils.RegistryUtils.systemResourceShouldBeAdded(RegistryUtils.java:640)
at org.wso2.carbon.registry.core.utils.RegistryUtils.addUserProfileCollection(RegistryUtils.java:994)
at org.wso2.carbon.registry.core.internal.RegistryCoreServiceComponent.buildRegistryService(RegistryCoreServiceComponent.java:535)
at org.wso2.carbon.registry.core.internal.RegistryCoreServiceComponent.activate(RegistryCoreServiceComponent.java:126)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.eclipse.equinox.internal.ds.model.ServiceComponent.activate(ServiceComponent.java:260)
at org.eclipse.equinox.internal.ds.model.ServiceComponentProp.activate(ServiceComponentProp.java:146)
at org.eclipse.equinox.internal.ds.model.ServiceComponentProp.build(ServiceComponentProp.java:345)
at org.eclipse.equinox.internal.ds.InstanceProcess.buildComponent(InstanceProcess.java:620)
at org.eclipse.equinox.internal.ds.InstanceProcess.buildComponents(InstanceProcess.java:197)
at org.eclipse.equinox.internal.ds.Resolver.getEligible(Resolver.java:343)
at org.eclipse.equinox.internal.ds.SCRManager.serviceChanged(SCRManager.java:222)
at org.eclipse.osgi.internal.serviceregistry.FilteredServiceListener.serviceChanged(FilteredServiceListener.java:107)
at org.eclipse.osgi.framework.internal.core.BundleContextImpl.dispatchEvent(BundleContextImpl.java:861)
at org.eclipse.osgi.framework.eventmgr.EventManager.dispatchEvent(EventManager.java:230)
at org.eclipse.osgi.framework.eventmgr.ListenerQueue.dispatchEventSynchronous(ListenerQueue.java:148)
at org.eclipse.osgi.internal.serviceregistry.ServiceRegistry.publishServiceEventPrivileged(ServiceRegistry.java:819)
at org.eclipse.osgi.internal.serviceregistry.ServiceRegistry.publishServiceEvent(ServiceRegistry.java:771)
at org.eclipse.osgi.internal.serviceregistry.ServiceRegistrationImpl.register(ServiceRegistrationImpl.java:130)
at org.eclipse.osgi.internal.serviceregistry.ServiceRegistry.registerService(ServiceRegistry.java:214)
at org.eclipse.osgi.framework.internal.core.BundleContextImpl.registerService(BundleContextImpl.java:433)
at org.wso2.carbon.user.core.internal.Activator.startDeploy(Activator.java:69)
at org.wso2.carbon.user.core.internal.BundleCheckActivator.start(BundleCheckActivator.java:61)
at org.eclipse.osgi.framework.internal.core.BundleContextImpl$1.run(BundleContextImpl.java:711)
at java.security.AccessController.doPrivileged(Native Method)
at org.eclipse.osgi.framework.internal.core.BundleContextImpl.startActivator(BundleContextImpl.java:702)
at org.eclipse.osgi.framework.internal.core.BundleContextImpl.start(BundleContextImpl.java:683)
at org.eclipse.osgi.framework.internal.core.BundleHost.startWorker(BundleHost.java:381)
at org.eclipse.osgi.framework.internal.core.AbstractBundle.resume(AbstractBundle.java:390)
at org.eclipse.osgi.framework.internal.core.Framework.resumeBundle(Framework.java:1176)
at org.eclipse.osgi.framework.internal.core.StartLevelManager.resumeBundles(StartLevelManager.java:559)
at org.eclipse.osgi.framework.internal.core.StartLevelManager.resumeBundles(StartLevelManager.java:544)
at org.eclipse.osgi.framework.internal.core.StartLevelManager.incFWSL(StartLevelManager.java:457)
at org.eclipse.osgi.framework.internal.core.StartLevelManager.doSetStartLevel(StartLevelManager.java:243)
at org.eclipse.osgi.framework.internal.core.StartLevelManager.dispatchEvent(StartLevelManager.java:438)
at org.eclipse.osgi.framework.internal.core.StartLevelManager.dispatchEvent(StartLevelManager.java:1)
at org.eclipse.osgi.framework.eventmgr.EventManager.dispatchEvent(EventManager.java:230)
at org.eclipse.osgi.framework.eventmgr.EventManager$EventThread.run(EventManager.java:340)
[2017-08-01 02:07:35,076] ERROR - RegistryCoreServiceComponent Failed to activate Registry Core bundle
org.wso2.carbon.registry.core.exceptions.RegistryException: Failed to close transaction.
at org.wso2.carbon.registry.core.jdbc.dataaccess.JDBCTransactionManager.endTransaction(JDBCTransactionManager.java:183)
at org.wso2.carbon.registry.core.jdbc.dataaccess.JDBCTransactionManager.commitTransaction(JDBCTransactionManager.java:167)
at org.wso2.carbon.registry.core.jdbc.EmbeddedRegistry.commitTransaction(EmbeddedRegistry.java:452)
at org.wso2.carbon.registry.core.jdbc.EmbeddedRegistry.resourceExists(EmbeddedRegistry.java:658)
at org.wso2.carbon.registry.core.caching.CacheBackedRegistry.resourceExists(CacheBackedRegistry.java:376)
at org.wso2.carbon.registry.core.session.UserRegistry.resourceExistsInternal(UserRegistry.java:774)
at org.wso2.carbon.registry.core.session.UserRegistry.access$800(UserRegistry.java:61)
at org.wso2.carbon.registry.core.session.UserRegistry$9.run(UserRegistry.java:757)
at org.wso2.carbon.registry.core.session.UserRegistry$9.run(UserRegistry.java:754)
at java.security.AccessController.doPrivileged(Native Method)
at org.wso2.carbon.registry.core.session.UserRegistry.resourceExists(UserRegistry.java:754)
at org.wso2.carbon.registry.core.utils.RegistryUtils.systemResourceShouldBeAdded(RegistryUtils.java:640)
at org.wso2.carbon.registry.core.utils.RegistryUtils.addUserProfileCollection(RegistryUtils.java:994)
at org.wso2.carbon.registry.core.internal.RegistryCoreServiceComponent.buildRegistryService(RegistryCoreServiceComponent.java:535)
at org.wso2.carbon.registry.core.internal.RegistryCoreServiceComponent.activate(RegistryCoreServiceComponent.java:126)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.eclipse.equinox.internal.ds.model.ServiceComponent.activate(ServiceComponent.java:260)
at org.eclipse.equinox.internal.ds.model.ServiceComponentProp.activate(ServiceComponentProp.java:146)
at org.eclipse.equinox.internal.ds.model.ServiceComponentProp.build(ServiceComponentProp.java:345)
at org.eclipse.equinox.internal.ds.InstanceProcess.buildComponent(InstanceProcess.java:620)
at org.eclipse.equinox.internal.ds.InstanceProcess.buildComponents(InstanceProcess.java:197)
at org.eclipse.equinox.internal.ds.Resolver.getEligible(Resolver.java:343)
at org.eclipse.equinox.internal.ds.SCRManager.serviceChanged(SCRManager.java:222)
at org.eclipse.osgi.internal.serviceregistry.FilteredServiceListener.serviceChanged(FilteredServiceListener.java:107)
at org.eclipse.osgi.framework.internal.core.BundleContextImpl.dispatchEvent(BundleContextImpl.java:861)
at org.eclipse.osgi.framework.eventmgr.EventManager.dispatchEvent(EventManager.java:230)
at org.eclipse.osgi.framework.eventmgr.ListenerQueue.dispatchEventSynchronous(ListenerQueue.java:148)
at org.eclipse.osgi.internal.serviceregistry.ServiceRegistry.publishServiceEventPrivileged(ServiceRegistry.java:819)
at org.eclipse.osgi.internal.serviceregistry.ServiceRegistry.publishServiceEvent(ServiceRegistry.java:771)
at org.eclipse.osgi.internal.serviceregistry.ServiceRegistrationImpl.register(ServiceRegistrationImpl.java:130)
at org.eclipse.osgi.internal.serviceregistry.ServiceRegistry.registerService(ServiceRegistry.java:214)
at org.eclipse.osgi.framework.internal.core.BundleContextImpl.registerService(BundleContextImpl.java:433)
at org.wso2.carbon.user.core.internal.Activator.startDeploy(Activator.java:69)
at org.wso2.carbon.user.core.internal.BundleCheckActivator.start(BundleCheckActivator.java:61)
at org.eclipse.osgi.framework.internal.core.BundleContextImpl$1.run(BundleContextImpl.java:711)
at java.security.AccessController.doPrivileged(Native Method)
at org.eclipse.osgi.framework.internal.core.BundleContextImpl.startActivator(BundleContextImpl.java:702)
at org.eclipse.osgi.framework.internal.core.BundleContextImpl.start(BundleContextImpl.java:683)
at org.eclipse.osgi.framework.internal.core.BundleHost.startWorker(BundleHost.java:381)
at org.eclipse.osgi.framework.internal.core.AbstractBundle.resume(AbstractBundle.java:390)
at org.eclipse.osgi.framework.internal.core.Framework.resumeBundle(Framework.java:1176)
at org.eclipse.osgi.framework.internal.core.StartLevelManager.resumeBundles(StartLevelManager.java:559)
at org.eclipse.osgi.framework.internal.core.StartLevelManager.resumeBundles(StartLevelManager.java:544)
at org.eclipse.osgi.framework.internal.core.StartLevelManager.incFWSL(StartLevelManager.java:457)
at org.eclipse.osgi.framework.internal.core.StartLevelManager.doSetStartLevel(StartLevelManager.java:243)
at org.eclipse.osgi.framework.internal.core.StartLevelManager.dispatchEvent(StartLevelManager.java:438)
at org.eclipse.osgi.framework.internal.core.StartLevelManager.dispatchEvent(StartLevelManager.java:1)
at org.eclipse.osgi.framework.eventmgr.EventManager.dispatchEvent(EventManager.java:230)
at org.eclipse.osgi.framework.eventmgr.EventManager$EventThread.run(EventManager.java:340)
Caused by: java.sql.SQLException: Total number of available connections are less than the total number of closed connections
at org.wso2.carbon.registry.core.jdbc.dataaccess.JDBCDatabaseTransaction$ManagedRegistryConnection.close(JDBCDatabaseTransaction.java:1360)
at org.wso2.carbon.registry.core.jdbc.dataaccess.JDBCTransactionManager.endTransaction(JDBCTransactionManager.java:178)
... 51 more
[2017-08-01 02:07:35,153] INFO - UserStoreMgtDSComponent Carbon UserStoreMgtDSComponent activated successfully.
[2017-08-01 02:07:45,824] INFO - TaglibUriRule TLD skipped. URI: http://tiles.apache.org/tags-tiles is already defined
非常感謝你提前。
聽起來像我這樣的連接問題：'PooledConnection已經關閉.'。你確定虛擬機和數據庫之間的連接可以嗎？ – wittich
是的，我可以從我的虛擬機遠程訪問數據庫 –