创建与 WildFly 10 和 Jaybird 3.0 的连接失败
Creating a connection with WildFly 10 and Jaybird 3.0 fails
我已将 Wildfly 10 中的 Jaybird 依赖项从 Jaybird 2.2.11 升级到 Jaybird 3.0.0-alpha-1。当我尝试创建连接时，我现在遇到以下异常。
启动后的第一个连接（在管理控制台中测试时）：
2016-08-27 10:50:45,354 WARN [org.jboss.jca.core.connectionmanager.pool.strategy.OnePool] (External Management Request Threads -- 2) IJ000604: Throwable while attempting to get a new connection: null: javax.resource.ResourceException: IJ031084: Unable to create connection
at org.jboss.jca.adapters.jdbc.local.LocalManagedConnectionFactory.createLocalManagedConnection(LocalManagedConnectionFactory.java:345)
at org.jboss.jca.adapters.jdbc.local.LocalManagedConnectionFactory.getLocalManagedConnection(LocalManagedConnectionFactory.java:352)
at org.jboss.jca.adapters.jdbc.local.LocalManagedConnectionFactory.createManagedConnection(LocalManagedConnectionFactory.java:287)
at org.jboss.jca.core.connectionmanager.pool.mcp.SemaphoreConcurrentLinkedDequeManagedConnectionPool.createConnectionEventListener(SemaphoreConcurrentLinkedDequeManagedConnectionPool.java:1320)
at org.jboss.jca.core.connectionmanager.pool.mcp.SemaphoreConcurrentLinkedDequeManagedConnectionPool.getConnection(SemaphoreConcurrentLinkedDequeManagedConnectionPool.java:496)
at org.jboss.jca.core.connectionmanager.pool.AbstractPool.internalTestConnection(AbstractPool.java:1052)
at org.jboss.jca.core.connectionmanager.pool.strategy.OnePool.testConnection(OnePool.java:93)
at org.jboss.as.connector.subsystems.common.pool.PoolOperations$TestConnectionInPool.invokeCommandOn(PoolOperations.java:234)
at org.jboss.as.connector.subsystems.common.pool.PoolOperations.execute(PoolOperations.java:90)
at org.jboss.as.controller.AbstractOperationContext.executeStep(AbstractOperationContext.java:890)
at org.jboss.as.controller.AbstractOperationContext.processStages(AbstractOperationContext.java:659)
at org.jboss.as.controller.AbstractOperationContext.executeOperation(AbstractOperationContext.java:370)
at org.jboss.as.controller.OperationContextImpl.executeOperation(OperationContextImpl.java:1329)
at org.jboss.as.controller.ModelControllerImpl.internalExecute(ModelControllerImpl.java:400)
at org.jboss.as.controller.ModelControllerImpl.execute(ModelControllerImpl.java:222)
at org.jboss.as.domain.http.server.DomainApiHandler.handleRequest(DomainApiHandler.java:219)
at io.undertow.server.handlers.encoding.EncodingHandler.handleRequest(EncodingHandler.java:72)
at org.jboss.as.domain.http.server.security.SubjectDoAsHandler.run(SubjectDoAsHandler.java:72)
at org.jboss.as.domain.http.server.security.SubjectDoAsHandler.run(SubjectDoAsHandler.java:68)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAs(Subject.java:422)
at org.jboss.as.controller.AccessAuditContext.doAs(AccessAuditContext.java:149)
at org.jboss.as.domain.http.server.security.SubjectDoAsHandler.handleRequest(SubjectDoAsHandler.java:68)
at org.jboss.as.domain.http.server.security.SubjectDoAsHandler.handleRequest(SubjectDoAsHandler.java:63)
at io.undertow.server.handlers.BlockingHandler.handleRequest(BlockingHandler.java:56)
at org.jboss.as.domain.http.server.DomainApiCheckHandler.handleRequest(DomainApiCheckHandler.java:95)
at io.undertow.server.Connectors.executeRootHandler(Connectors.java:202)
at io.undertow.server.HttpServerExchange.run(HttpServerExchange.java:805)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)
at org.jboss.threads.JBossThread.run(JBossThread.java:320)
Caused by: java.util.ServiceConfigurationError: org.firebirdsql.encodings.EncodingSet: Provider org.firebirdsql.encodings.DefaultEncodingSet could not be instantiated
at java.util.ServiceLoader.fail(ServiceLoader.java:232)
at java.util.ServiceLoader.access0(ServiceLoader.java:185)
at java.util.ServiceLoader$LazyIterator.nextService(ServiceLoader.java:384)
at java.util.ServiceLoader$LazyIterator.next(ServiceLoader.java:404)
at java.util.ServiceLoader.next(ServiceLoader.java:480)
at org.firebirdsql.encodings.EncodingFactory.loadEncodingSets(EncodingFactory.java:318)
at org.firebirdsql.encodings.EncodingFactory.createInstance(EncodingFactory.java:474)
at org.firebirdsql.encodings.EncodingFactory.access[=10=]0(EncodingFactory.java:36)
at org.firebirdsql.encodings.EncodingFactory$DefaultEncodingFactory.<clinit>(EncodingFactory.java:59)
at org.firebirdsql.encodings.EncodingFactory.getPlatformDefault(EncodingFactory.java:428)
at org.firebirdsql.jdbc.FBDriverPropertyManager.handleEncodings(FBDriverPropertyManager.java:241)
at org.firebirdsql.jdbc.FBDriverPropertyManager.normalize(FBDriverPropertyManager.java:208)
at org.firebirdsql.jdbc.FBDriver.connect(FBDriver.java:116)
at org.jboss.jca.adapters.jdbc.local.LocalManagedConnectionFactory.createLocalManagedConnection(LocalManagedConnectionFactory.java:321)
... 31 more
Caused by: java.lang.NoClassDefFoundError: javax/xml/bind/JAXBException
at java.lang.Class.getDeclaredConstructors0(Native Method)
at java.lang.Class.privateGetDeclaredConstructors(Class.java:2671)
at java.lang.Class.getConstructor0(Class.java:3075)
at java.lang.Class.newInstance(Class.java:412)
at java.util.ServiceLoader$LazyIterator.nextService(ServiceLoader.java:380)
... 42 more
Caused by: java.lang.ClassNotFoundException: javax.xml.bind.JAXBException from [Module "org.firebirdsql:main" from local module loader @1c2c22f3 (finder: local module finder @18e8568 (roots: D:\DevSoft\wildfly-10.1.0.Final\modules,D:\DevSoft\wildfly-10.1.0.Final\modules\system\layers\base))]
at org.jboss.modules.ModuleClassLoader.findClass(ModuleClassLoader.java:198)
at org.jboss.modules.ConcurrentClassLoader.performLoadClassUnchecked(ConcurrentClassLoader.java:363)
at org.jboss.modules.ConcurrentClassLoader.performLoadClass(ConcurrentClassLoader.java:351)
at org.jboss.modules.ConcurrentClassLoader.loadClass(ConcurrentClassLoader.java:93)
... 47 more
随后尝试连接测试：
2016-08-27 10:50:52,349 WARN [org.jboss.jca.core.connectionmanager.pool.strategy.OnePool] (External Management Request Threads -- 4) IJ000604: Throwable while attempting to get a new connection: null: javax.resource.ResourceException: IJ031084: Unable to create connection
at org.jboss.jca.adapters.jdbc.local.LocalManagedConnectionFactory.createLocalManagedConnection(LocalManagedConnectionFactory.java:345)
at org.jboss.jca.adapters.jdbc.local.LocalManagedConnectionFactory.getLocalManagedConnection(LocalManagedConnectionFactory.java:352)
at org.jboss.jca.adapters.jdbc.local.LocalManagedConnectionFactory.createManagedConnection(LocalManagedConnectionFactory.java:287)
at org.jboss.jca.core.connectionmanager.pool.mcp.SemaphoreConcurrentLinkedDequeManagedConnectionPool.createConnectionEventListener(SemaphoreConcurrentLinkedDequeManagedConnectionPool.java:1320)
at org.jboss.jca.core.connectionmanager.pool.mcp.SemaphoreConcurrentLinkedDequeManagedConnectionPool.getConnection(SemaphoreConcurrentLinkedDequeManagedConnectionPool.java:496)
at org.jboss.jca.core.connectionmanager.pool.AbstractPool.internalTestConnection(AbstractPool.java:1052)
at org.jboss.jca.core.connectionmanager.pool.strategy.OnePool.testConnection(OnePool.java:93)
at org.jboss.as.connector.subsystems.common.pool.PoolOperations$TestConnectionInPool.invokeCommandOn(PoolOperations.java:234)
at org.jboss.as.connector.subsystems.common.pool.PoolOperations.execute(PoolOperations.java:90)
at org.jboss.as.controller.AbstractOperationContext.executeStep(AbstractOperationContext.java:890)
at org.jboss.as.controller.AbstractOperationContext.processStages(AbstractOperationContext.java:659)
at org.jboss.as.controller.AbstractOperationContext.executeOperation(AbstractOperationContext.java:370)
at org.jboss.as.controller.OperationContextImpl.executeOperation(OperationContextImpl.java:1329)
at org.jboss.as.controller.ModelControllerImpl.internalExecute(ModelControllerImpl.java:400)
at org.jboss.as.controller.ModelControllerImpl.execute(ModelControllerImpl.java:222)
at org.jboss.as.domain.http.server.DomainApiHandler.handleRequest(DomainApiHandler.java:219)
at io.undertow.server.handlers.encoding.EncodingHandler.handleRequest(EncodingHandler.java:72)
at org.jboss.as.domain.http.server.security.SubjectDoAsHandler.run(SubjectDoAsHandler.java:72)
at org.jboss.as.domain.http.server.security.SubjectDoAsHandler.run(SubjectDoAsHandler.java:68)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAs(Subject.java:422)
at org.jboss.as.controller.AccessAuditContext.doAs(AccessAuditContext.java:149)
at org.jboss.as.domain.http.server.security.SubjectDoAsHandler.handleRequest(SubjectDoAsHandler.java:68)
at org.jboss.as.domain.http.server.security.SubjectDoAsHandler.handleRequest(SubjectDoAsHandler.java:63)
at io.undertow.server.handlers.BlockingHandler.handleRequest(BlockingHandler.java:56)
at org.jboss.as.domain.http.server.DomainApiCheckHandler.handleRequest(DomainApiCheckHandler.java:95)
at io.undertow.server.Connectors.executeRootHandler(Connectors.java:202)
at io.undertow.server.HttpServerExchange.run(HttpServerExchange.java:805)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)
at org.jboss.threads.JBossThread.run(JBossThread.java:320)
Caused by: java.lang.NoClassDefFoundError: Could not initialize class org.firebirdsql.encodings.EncodingFactory$DefaultEncodingFactory
at org.firebirdsql.encodings.EncodingFactory.getPlatformDefault(EncodingFactory.java:428)
at org.firebirdsql.jdbc.FBDriverPropertyManager.handleEncodings(FBDriverPropertyManager.java:241)
at org.firebirdsql.jdbc.FBDriverPropertyManager.normalize(FBDriverPropertyManager.java:208)
at org.firebirdsql.jdbc.FBDriver.connect(FBDriver.java:116)
at org.jboss.jca.adapters.jdbc.local.LocalManagedConnectionFactory.createLocalManagedConnection(LocalManagedConnectionFactory.java:321)
... 31 more
我使用以下 module.xml 作为 Jaybird 驱动程序：
<?xml version="1.0" encoding="UTF-8"?>
<module xmlns="urn:jboss:module:1.0" name="org.firebirdsql">
<resources>
<resource-root path="jaybird-3.0.0-alpha-1.jar"/>
</resources>
<dependencies>
<module name="javax.api"/>
<module name="javax.transaction.api"/>
<module name="javax.resource.api"/>
</dependencies>
</module>
这是什么原因造成的，我该如何解决？
注意：此 question/answer 来自错误报告 JDBC-449
在提问时，Jaybird 3 的测试版本也依赖于 javax.xml.bind 中的 类，如 java.lang.ClassNotFoundException: javax.xml.bind.JAXBException 所示。此异常导致编码定义加载失败，进而导致 org.firebirdsql.encodings.EncodingFactory$DefaultEncodingFactory 加载失败。结果连接不上
后续尝试出现异常是因为EncodingFactory$DefaultEncodingFactory无法加载。
注意：在最终的 Jaybird 3.0.0 版本中删除了对 javax.xml.bind 的依赖，因此下面的解决方法是 not Jaybird 3 及更高版本的最终版本所必需的（请参阅下面关于 Jaybird 3.0.4 及更高版本的注释）。
解决方案是将 javax.xml.bind.api 的依赖项添加到 Jaybird 模块的依赖项中：
<?xml version="1.0" encoding="UTF-8"?>
<module xmlns="urn:jboss:module:1.0" name="org.firebirdsql">
<resources>
<resource-root path="jaybird-3.0.0-alpha-1.jar"/>
</resources>
<dependencies>
<module name="javax.api"/>
<module name="javax.transaction.api"/>
<module name="javax.resource.api"/>
<module name="javax.xml.bind.api"/> <!-- Add this -->
</dependencies>
</module>
Jaybird 3.0.4 及更高版本注意事项
Jaybird 3.0.4 for Java 7 仅重新引入了对 JAXB 的依赖。如果可能，切换到 Jaybird 的 Java 8 版本，否则应用此解决方案。
我已将 Wildfly 10 中的 Jaybird 依赖项从 Jaybird 2.2.11 升级到 Jaybird 3.0.0-alpha-1。当我尝试创建连接时，我现在遇到以下异常。
启动后的第一个连接（在管理控制台中测试时）：
2016-08-27 10:50:45,354 WARN [org.jboss.jca.core.connectionmanager.pool.strategy.OnePool] (External Management Request Threads -- 2) IJ000604: Throwable while attempting to get a new connection: null: javax.resource.ResourceException: IJ031084: Unable to create connection
at org.jboss.jca.adapters.jdbc.local.LocalManagedConnectionFactory.createLocalManagedConnection(LocalManagedConnectionFactory.java:345)
at org.jboss.jca.adapters.jdbc.local.LocalManagedConnectionFactory.getLocalManagedConnection(LocalManagedConnectionFactory.java:352)
at org.jboss.jca.adapters.jdbc.local.LocalManagedConnectionFactory.createManagedConnection(LocalManagedConnectionFactory.java:287)
at org.jboss.jca.core.connectionmanager.pool.mcp.SemaphoreConcurrentLinkedDequeManagedConnectionPool.createConnectionEventListener(SemaphoreConcurrentLinkedDequeManagedConnectionPool.java:1320)
at org.jboss.jca.core.connectionmanager.pool.mcp.SemaphoreConcurrentLinkedDequeManagedConnectionPool.getConnection(SemaphoreConcurrentLinkedDequeManagedConnectionPool.java:496)
at org.jboss.jca.core.connectionmanager.pool.AbstractPool.internalTestConnection(AbstractPool.java:1052)
at org.jboss.jca.core.connectionmanager.pool.strategy.OnePool.testConnection(OnePool.java:93)
at org.jboss.as.connector.subsystems.common.pool.PoolOperations$TestConnectionInPool.invokeCommandOn(PoolOperations.java:234)
at org.jboss.as.connector.subsystems.common.pool.PoolOperations.execute(PoolOperations.java:90)
at org.jboss.as.controller.AbstractOperationContext.executeStep(AbstractOperationContext.java:890)
at org.jboss.as.controller.AbstractOperationContext.processStages(AbstractOperationContext.java:659)
at org.jboss.as.controller.AbstractOperationContext.executeOperation(AbstractOperationContext.java:370)
at org.jboss.as.controller.OperationContextImpl.executeOperation(OperationContextImpl.java:1329)
at org.jboss.as.controller.ModelControllerImpl.internalExecute(ModelControllerImpl.java:400)
at org.jboss.as.controller.ModelControllerImpl.execute(ModelControllerImpl.java:222)
at org.jboss.as.domain.http.server.DomainApiHandler.handleRequest(DomainApiHandler.java:219)
at io.undertow.server.handlers.encoding.EncodingHandler.handleRequest(EncodingHandler.java:72)
at org.jboss.as.domain.http.server.security.SubjectDoAsHandler.run(SubjectDoAsHandler.java:72)
at org.jboss.as.domain.http.server.security.SubjectDoAsHandler.run(SubjectDoAsHandler.java:68)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAs(Subject.java:422)
at org.jboss.as.controller.AccessAuditContext.doAs(AccessAuditContext.java:149)
at org.jboss.as.domain.http.server.security.SubjectDoAsHandler.handleRequest(SubjectDoAsHandler.java:68)
at org.jboss.as.domain.http.server.security.SubjectDoAsHandler.handleRequest(SubjectDoAsHandler.java:63)
at io.undertow.server.handlers.BlockingHandler.handleRequest(BlockingHandler.java:56)
at org.jboss.as.domain.http.server.DomainApiCheckHandler.handleRequest(DomainApiCheckHandler.java:95)
at io.undertow.server.Connectors.executeRootHandler(Connectors.java:202)
at io.undertow.server.HttpServerExchange.run(HttpServerExchange.java:805)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)
at org.jboss.threads.JBossThread.run(JBossThread.java:320)
Caused by: java.util.ServiceConfigurationError: org.firebirdsql.encodings.EncodingSet: Provider org.firebirdsql.encodings.DefaultEncodingSet could not be instantiated
at java.util.ServiceLoader.fail(ServiceLoader.java:232)
at java.util.ServiceLoader.access0(ServiceLoader.java:185)
at java.util.ServiceLoader$LazyIterator.nextService(ServiceLoader.java:384)
at java.util.ServiceLoader$LazyIterator.next(ServiceLoader.java:404)
at java.util.ServiceLoader.next(ServiceLoader.java:480)
at org.firebirdsql.encodings.EncodingFactory.loadEncodingSets(EncodingFactory.java:318)
at org.firebirdsql.encodings.EncodingFactory.createInstance(EncodingFactory.java:474)
at org.firebirdsql.encodings.EncodingFactory.access[=10=]0(EncodingFactory.java:36)
at org.firebirdsql.encodings.EncodingFactory$DefaultEncodingFactory.<clinit>(EncodingFactory.java:59)
at org.firebirdsql.encodings.EncodingFactory.getPlatformDefault(EncodingFactory.java:428)
at org.firebirdsql.jdbc.FBDriverPropertyManager.handleEncodings(FBDriverPropertyManager.java:241)
at org.firebirdsql.jdbc.FBDriverPropertyManager.normalize(FBDriverPropertyManager.java:208)
at org.firebirdsql.jdbc.FBDriver.connect(FBDriver.java:116)
at org.jboss.jca.adapters.jdbc.local.LocalManagedConnectionFactory.createLocalManagedConnection(LocalManagedConnectionFactory.java:321)
... 31 more
Caused by: java.lang.NoClassDefFoundError: javax/xml/bind/JAXBException
at java.lang.Class.getDeclaredConstructors0(Native Method)
at java.lang.Class.privateGetDeclaredConstructors(Class.java:2671)
at java.lang.Class.getConstructor0(Class.java:3075)
at java.lang.Class.newInstance(Class.java:412)
at java.util.ServiceLoader$LazyIterator.nextService(ServiceLoader.java:380)
... 42 more
Caused by: java.lang.ClassNotFoundException: javax.xml.bind.JAXBException from [Module "org.firebirdsql:main" from local module loader @1c2c22f3 (finder: local module finder @18e8568 (roots: D:\DevSoft\wildfly-10.1.0.Final\modules,D:\DevSoft\wildfly-10.1.0.Final\modules\system\layers\base))]
at org.jboss.modules.ModuleClassLoader.findClass(ModuleClassLoader.java:198)
at org.jboss.modules.ConcurrentClassLoader.performLoadClassUnchecked(ConcurrentClassLoader.java:363)
at org.jboss.modules.ConcurrentClassLoader.performLoadClass(ConcurrentClassLoader.java:351)
at org.jboss.modules.ConcurrentClassLoader.loadClass(ConcurrentClassLoader.java:93)
... 47 more
随后尝试连接测试：
2016-08-27 10:50:52,349 WARN [org.jboss.jca.core.connectionmanager.pool.strategy.OnePool] (External Management Request Threads -- 4) IJ000604: Throwable while attempting to get a new connection: null: javax.resource.ResourceException: IJ031084: Unable to create connection
at org.jboss.jca.adapters.jdbc.local.LocalManagedConnectionFactory.createLocalManagedConnection(LocalManagedConnectionFactory.java:345)
at org.jboss.jca.adapters.jdbc.local.LocalManagedConnectionFactory.getLocalManagedConnection(LocalManagedConnectionFactory.java:352)
at org.jboss.jca.adapters.jdbc.local.LocalManagedConnectionFactory.createManagedConnection(LocalManagedConnectionFactory.java:287)
at org.jboss.jca.core.connectionmanager.pool.mcp.SemaphoreConcurrentLinkedDequeManagedConnectionPool.createConnectionEventListener(SemaphoreConcurrentLinkedDequeManagedConnectionPool.java:1320)
at org.jboss.jca.core.connectionmanager.pool.mcp.SemaphoreConcurrentLinkedDequeManagedConnectionPool.getConnection(SemaphoreConcurrentLinkedDequeManagedConnectionPool.java:496)
at org.jboss.jca.core.connectionmanager.pool.AbstractPool.internalTestConnection(AbstractPool.java:1052)
at org.jboss.jca.core.connectionmanager.pool.strategy.OnePool.testConnection(OnePool.java:93)
at org.jboss.as.connector.subsystems.common.pool.PoolOperations$TestConnectionInPool.invokeCommandOn(PoolOperations.java:234)
at org.jboss.as.connector.subsystems.common.pool.PoolOperations.execute(PoolOperations.java:90)
at org.jboss.as.controller.AbstractOperationContext.executeStep(AbstractOperationContext.java:890)
at org.jboss.as.controller.AbstractOperationContext.processStages(AbstractOperationContext.java:659)
at org.jboss.as.controller.AbstractOperationContext.executeOperation(AbstractOperationContext.java:370)
at org.jboss.as.controller.OperationContextImpl.executeOperation(OperationContextImpl.java:1329)
at org.jboss.as.controller.ModelControllerImpl.internalExecute(ModelControllerImpl.java:400)
at org.jboss.as.controller.ModelControllerImpl.execute(ModelControllerImpl.java:222)
at org.jboss.as.domain.http.server.DomainApiHandler.handleRequest(DomainApiHandler.java:219)
at io.undertow.server.handlers.encoding.EncodingHandler.handleRequest(EncodingHandler.java:72)
at org.jboss.as.domain.http.server.security.SubjectDoAsHandler.run(SubjectDoAsHandler.java:72)
at org.jboss.as.domain.http.server.security.SubjectDoAsHandler.run(SubjectDoAsHandler.java:68)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAs(Subject.java:422)
at org.jboss.as.controller.AccessAuditContext.doAs(AccessAuditContext.java:149)
at org.jboss.as.domain.http.server.security.SubjectDoAsHandler.handleRequest(SubjectDoAsHandler.java:68)
at org.jboss.as.domain.http.server.security.SubjectDoAsHandler.handleRequest(SubjectDoAsHandler.java:63)
at io.undertow.server.handlers.BlockingHandler.handleRequest(BlockingHandler.java:56)
at org.jboss.as.domain.http.server.DomainApiCheckHandler.handleRequest(DomainApiCheckHandler.java:95)
at io.undertow.server.Connectors.executeRootHandler(Connectors.java:202)
at io.undertow.server.HttpServerExchange.run(HttpServerExchange.java:805)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)
at org.jboss.threads.JBossThread.run(JBossThread.java:320)
Caused by: java.lang.NoClassDefFoundError: Could not initialize class org.firebirdsql.encodings.EncodingFactory$DefaultEncodingFactory
at org.firebirdsql.encodings.EncodingFactory.getPlatformDefault(EncodingFactory.java:428)
at org.firebirdsql.jdbc.FBDriverPropertyManager.handleEncodings(FBDriverPropertyManager.java:241)
at org.firebirdsql.jdbc.FBDriverPropertyManager.normalize(FBDriverPropertyManager.java:208)
at org.firebirdsql.jdbc.FBDriver.connect(FBDriver.java:116)
at org.jboss.jca.adapters.jdbc.local.LocalManagedConnectionFactory.createLocalManagedConnection(LocalManagedConnectionFactory.java:321)
... 31 more
我使用以下 module.xml 作为 Jaybird 驱动程序：
<?xml version="1.0" encoding="UTF-8"?>
<module xmlns="urn:jboss:module:1.0" name="org.firebirdsql">
<resources>
<resource-root path="jaybird-3.0.0-alpha-1.jar"/>
</resources>
<dependencies>
<module name="javax.api"/>
<module name="javax.transaction.api"/>
<module name="javax.resource.api"/>
</dependencies>
</module>
这是什么原因造成的，我该如何解决？
注意：此 question/answer 来自错误报告 JDBC-449
在提问时，Jaybird 3 的测试版本也依赖于 javax.xml.bind 中的 类，如 java.lang.ClassNotFoundException: javax.xml.bind.JAXBException 所示。此异常导致编码定义加载失败，进而导致 org.firebirdsql.encodings.EncodingFactory$DefaultEncodingFactory 加载失败。结果连接不上
后续尝试出现异常是因为EncodingFactory$DefaultEncodingFactory无法加载。
注意：在最终的 Jaybird 3.0.0 版本中删除了对 javax.xml.bind 的依赖，因此下面的解决方法是 not Jaybird 3 及更高版本的最终版本所必需的（请参阅下面关于 Jaybird 3.0.4 及更高版本的注释）。
解决方案是将 javax.xml.bind.api 的依赖项添加到 Jaybird 模块的依赖项中：
<?xml version="1.0" encoding="UTF-8"?>
<module xmlns="urn:jboss:module:1.0" name="org.firebirdsql">
<resources>
<resource-root path="jaybird-3.0.0-alpha-1.jar"/>
</resources>
<dependencies>
<module name="javax.api"/>
<module name="javax.transaction.api"/>
<module name="javax.resource.api"/>
<module name="javax.xml.bind.api"/> <!-- Add this -->
</dependencies>
</module>
Jaybird 3.0.4 及更高版本注意事项
Jaybird 3.0.4 for Java 7 仅重新引入了对 JAXB 的依赖。如果可能，切换到 Jaybird 的 Java 8 版本，否则应用此解决方案。