我对 Wildfly/JBoss 完全陌生，所以我不知道该怎么做，从昨天中午开始我就一直在处理这个问题。我正在尝试使用 mysql-connector-java-8.0.20.jar 作为连接器，而我的 Wildfly 版本是 wildfly-19.0.0.Final。所以服务器上的部署似乎工作正常，但每当我尝试添加数据源并测试连接时，我都会收到此错误：
"WFLYJCA0040: failed to invoke operation: WFLYJCA0047: Connection is not valid"
日志/服务器抛出：
2020-06-19 12:47:04,231 INFO [org.jboss.as.connector.subsystems.datasources] (MSC service thread 1-7) WFLYJCA0001: Bound data source [java:jboss/datasources/MySqlDS]
2020-06-19 12:47:04,353 WARN [org.jboss.jca.core.connectionmanager.pool.strategy.OnePool] (External Management Request Threads -- 1) IJ000604: Throwable while attempting to get a new connection: null: javax.resource.ResourceException: IJ031084: Unable to create connection
at org.jboss.ironjacamar.jdbcadapters@1.4.20.Final//org.jboss.jca.adapters.jdbc.local.LocalManagedConnectionFactory.createLocalManagedConnection(LocalManagedConnectionFactory.java:345)
at org.jboss.ironjacamar.jdbcadapters@1.4.20.Final//org.jboss.jca.adapters.jdbc.local.LocalManagedConnectionFactory.getLocalManagedConnection(LocalManagedConnectionFactory.java:352)
at org.jboss.ironjacamar.jdbcadapters@1.4.20.Final//org.jboss.jca.adapters.jdbc.local.LocalManagedConnectionFactory.createManagedConnection(LocalManagedConnectionFactory.java:287)
at org.jboss.ironjacamar.impl@1.4.20.Final//org.jboss.jca.core.connectionmanager.pool.mcp.SemaphoreConcurrentLinkedDequeManagedConnectionPool.createConnectionEventListener(SemaphoreConcurrentLinkedDequeManagedConnectionPool.java:1326)
at org.jboss.ironjacamar.impl@1.4.20.Final//org.jboss.jca.core.connectionmanager.pool.mcp.SemaphoreConcurrentLinkedDequeManagedConnectionPool.getConnection(SemaphoreConcurrentLinkedDequeManagedConnectionPool.java:499)
at org.jboss.ironjacamar.impl@1.4.20.Final//org.jboss.jca.core.connectionmanager.pool.AbstractPool.internalTestConnection(AbstractPool.java:1067)
at org.jboss.ironjacamar.impl@1.4.20.Final//org.jboss.jca.core.connectionmanager.pool.strategy.OnePool.testConnection(OnePool.java:93)
at org.jboss.as.connector@19.0.0.Final//org.jboss.as.connector.subsystems.common.pool.PoolOperations$TestConnectionInPool.invokeCommandOn(PoolOperations.java:240)
at org.jboss.as.connector@19.0.0.Final//org.jboss.as.connector.subsystems.common.pool.PoolOperations$1.execute(PoolOperations.java:97)
at org.jboss.as.controller@11.0.0.Final//org.jboss.as.controller.AbstractOperationContext.executeStep(AbstractOperationContext.java:999)
at org.jboss.as.controller@11.0.0.Final//org.jboss.as.controller.AbstractOperationContext.processStages(AbstractOperationContext.java:743)
at org.jboss.as.controller@11.0.0.Final//org.jboss.as.controller.AbstractOperationContext.executeOperation(AbstractOperationContext.java:467)
at org.jboss.as.controller@11.0.0.Final//org.jboss.as.controller.OperationContextImpl.executeOperation(OperationContextImpl.java:1413)
at org.jboss.as.controller@11.0.0.Final//org.jboss.as.controller.ModelControllerImpl.internalExecute(ModelControllerImpl.java:429)
at org.jboss.as.controller@11.0.0.Final//org.jboss.as.controller.ModelControllerImpl.lambda$execute$1(ModelControllerImpl.java:246)
at org.wildfly.security.elytron-private@1.11.2.Final//org.wildfly.security.auth.server.SecurityIdentity.runAs(SecurityIdentity.java:289)
at org.wildfly.security.elytron-private@1.11.2.Final//org.wildfly.security.auth.server.SecurityIdentity.runAs(SecurityIdentity.java:255)
at org.jboss.as.controller@11.0.0.Final//org.jboss.as.controller.ModelControllerImpl.execute(ModelControllerImpl.java:246)
at org.jboss.as.domain-http-interface@11.0.0.Final//org.jboss.as.domain.http.server.DomainApiHandler.handleRequest(DomainApiHandler.java:212)
at io.undertow.core@2.0.30.Final//io.undertow.server.handlers.encoding.EncodingHandler.handleRequest(EncodingHandler.java:72)
at org.jboss.as.domain-http-interface@11.0.0.Final//org.jboss.as.domain.http.server.DomainApiCheckHandler.handleRequest(DomainApiCheckHandler.java:93)
at org.jboss.as.domain-http-interface@11.0.0.Final//org.jboss.as.domain.http.server.security.ElytronIdentityHandler.lambda$handleRequest$0(ElytronIdentityHandler.java:62)
at org.wildfly.security.elytron-private@1.11.2.Final//org.wildfly.security.auth.server.SecurityIdentity.runAs(SecurityIdentity.java:313)
at org.wildfly.security.elytron-private@1.11.2.Final//org.wildfly.security.auth.server.SecurityIdentity.runAs(SecurityIdentity.java:270)
at org.jboss.as.controller@11.0.0.Final//org.jboss.as.controller.AccessAuditContext.doAs(AccessAuditContext.java:254)
at org.jboss.as.controller@11.0.0.Final//org.jboss.as.controller.AccessAuditContext.doAs(AccessAuditContext.java:225)
at org.jboss.as.domain-http-interface@11.0.0.Final//org.jboss.as.domain.http.server.security.ElytronIdentityHandler.handleRequest(ElytronIdentityHandler.java:61)
at io.undertow.core@2.0.30.Final//io.undertow.server.handlers.BlockingHandler.handleRequest(BlockingHandler.java:56)
at io.undertow.core@2.0.30.Final//io.undertow.server.Connectors.executeRootHandler(Connectors.java:376)
at io.undertow.core@2.0.30.Final//io.undertow.server.HttpServerExchange$1.run(HttpServerExchange.java:830)
at org.jboss.threads@2.3.3.Final//org.jboss.threads.ContextClassLoaderSavingRunnable.run(ContextClassLoaderSavingRunnable.java:35)
at org.jboss.threads@2.3.3.Final//org.jboss.threads.EnhancedQueueExecutor.safeRun(EnhancedQueueExecutor.java:1982)
at org.jboss.threads@2.3.3.Final//org.jboss.threads.EnhancedQueueExecutor$ThreadBody.doRunTask(EnhancedQueueExecutor.java:1486)
at org.jboss.threads@2.3.3.Final//org.jboss.threads.EnhancedQueueExecutor$ThreadBody.run(EnhancedQueueExecutor.java:1377)
at java.base/java.lang.Thread.run(Thread.java:835)
at org.jboss.threads@2.3.3.Final//org.jboss.threads.JBossThread.run(JBossThread.java:485)
Caused by: java.sql.SQLException: The server time zone value 'Mitteleurop?ische Sommerzeit' is unrecognized or represents more than one time zone. You must configure either the server or JDBC driver (via the 'serverTimezone' configuration property) to use a more specifc time zone value if you want to utilize time zone support.
at deployment.mysql-connector-java-8.0.20.jar//com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:129)
at deployment.mysql-connector-java-8.0.20.jar//com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:97)
at deployment.mysql-connector-java-8.0.20.jar//com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:89)
at deployment.mysql-connector-java-8.0.20.jar//com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:63)
at deployment.mysql-connector-java-8.0.20.jar//com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:73)
at deployment.mysql-connector-java-8.0.20.jar//com.mysql.cj.jdbc.exceptions.SQLExceptionsMapping.translateException(SQLExceptionsMapping.java:76)
at deployment.mysql-connector-java-8.0.20.jar//com.mysql.cj.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:836)
at deployment.mysql-connector-java-8.0.20.jar//com.mysql.cj.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:456)
at deployment.mysql-connector-java-8.0.20.jar//com.mysql.cj.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:246)
at deployment.mysql-connector-java-8.0.20.jar//com.mysql.cj.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:197)
at org.jboss.ironjacamar.jdbcadapters@1.4.20.Final//org.jboss.jca.adapters.jdbc.local.LocalManagedConnectionFactory.createLocalManagedConnection(LocalManagedConnectionFactory.java:321)
... 35 more
Caused by: com.mysql.cj.exceptions.InvalidConnectionAttributeException: The server time zone value 'Mitteleurop?ische Sommerzeit' is unrecognized or represents more than one time zone. You must configure either the server or JDBC driver (via the 'serverTimezone' configuration property) to use a more specifc time zone value if you want to utilize time zone support.
at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
at java.base/jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.base/java.lang.reflect.Constructor.newInstanceWithCaller(Constructor.java:500)
at java.base/java.lang.reflect.Constructor.newInstance(Constructor.java:481)
at deployment.mysql-connector-java-8.0.20.jar//com.mysql.cj.exceptions.ExceptionFactory.createException(ExceptionFactory.java:61)
at deployment.mysql-connector-java-8.0.20.jar//com.mysql.cj.exceptions.ExceptionFactory.createException(ExceptionFactory.java:85)
at deployment.mysql-connector-java-8.0.20.jar//com.mysql.cj.util.TimeUtil.getCanonicalTimezone(TimeUtil.java:132)
at deployment.mysql-connector-java-8.0.20.jar//com.mysql.cj.protocol.a.NativeProtocol.configureTimezone(NativeProtocol.java:2120)
at deployment.mysql-connector-java-8.0.20.jar//com.mysql.cj.protocol.a.NativeProtocol.initServerSession(NativeProtocol.java:2143)
at deployment.mysql-connector-java-8.0.20.jar//com.mysql.cj.jdbc.ConnectionImpl.initializePropsFromServer(ConnectionImpl.java:1310)
at deployment.mysql-connector-java-8.0.20.jar//com.mysql.cj.jdbc.ConnectionImpl.connectOneTryOnly(ConnectionImpl.java:967)
at deployment.mysql-connector-java-8.0.20.jar//com.mysql.cj.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:826)
... 39 more
2020-06-19 12:47:04,356 ERROR [org.jboss.as.controller.management-operation] (External Management Request Threads -- 1) WFLYCTL0013: Operation ("test-connection-in-pool") failed - address: ([
("subsystem" => "datasources"),
("data-source" => "MySqlDS")
]) - failure description: "WFLYJCA0040: failed to invoke operation: WFLYJCA0047: Connection is not valid"
正如我所说，我是新人，所以请不要期望有太多关于野蝇的现有知识。感谢问候！