原因：java.lang.IllegalAccessError:试图从类javax.mail.Session访问类javax.mail.Session$1

发送邮件的代码在独立运行时工作正常！ 但在wildfly中处理时，会抛出以下错误：

17:55:33,038 ERROR [io.undertow.request] (default task-39) UT005023: Exception handling request to /hibu-activiti-rest/service/runtime/process-instances: org.springframework.web.util.NestedServletException: Handler processing failed; nested exception is java.lang.IllegalAccessError: tried to access class javax.mail.Session$1 from class javax.mail.Session
        at org.springframework.web.servlet.DispatcherServlet.triggerAfterCompletionWithError(DispatcherServlet.java:1287) [spring-webmvc-4.1.5.RELEASE.jar:4.1.5.RELEASE]
        at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:961) [spring-webmvc-4.1.5.RELEASE.jar:4.1.5.RELEASE]
        at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:877) [spring-webmvc-4.1.5.RELEASE.jar:4.1.5.RELEASE]
        at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:966) [spring-webmvc-4.1.5.RELEASE.jar:4.1.5.RELEASE]
        at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:868) [spring-webmvc-4.1.5.RELEASE.jar:4.1.5.RELEASE]
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:707) [jboss-servlet-api_3.1_spec-1.0.0.Final.jar:1.0.0.Final]
        at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:842) [spring-webmvc-4.1.5.RELEASE.jar:4.1.5.RELEASE]
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:790) [jboss-servlet-api_3.1_spec-1.0.0.Final.jar:1.0.0.Final]
        at io.undertow.servlet.handlers.ServletHandler.handleRequest(ServletHandler.java:85) [undertow-servlet-1.0.15.Final.jar:1.0.15.Final]
        at io.undertow.servlet.handlers.security.ServletSecurityRoleHandler.handleRequest(ServletSecurityRoleHandler.java:61) [undertow-servlet-1.0.15.Final.jar:1.0.15.Final]
        at io.undertow.servlet.handlers.ServletDispatchingHandler.handleRequest(ServletDispatchingHandler.java:36) [undertow-servlet-1.0.15.Final.jar:1.0.15.Final]
        at org.wildfly.extension.undertow.security.SecurityContextAssociationHandler.handleRequest(SecurityContextAssociationHandler.java:78)
        at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:25) [undertow-core-1.0.15.Final.jar:1.0.15.Final]
        at io.undertow.servlet.handlers.security.SSLInformationAssociationHandler.handleRequest(SSLInformationAssociationHandler.java:113) [undertow-servlet-1.0.15.Final.jar:1.0.15.Final]
        at io.undertow.servlet.handlers.security.ServletAuthenticationCallHandler.handleRequest(ServletAuthenticationCallHandler.java:56) [undertow-servlet-1.0.15.Final.jar:1.0.15.Final]
        at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:25) [undertow-core-1.0.15.Final.jar:1.0.15.Final]
        at io.undertow.security.handlers.AbstractConfidentialityHandler.handleRequest(AbstractConfidentialityHandler.java:45) [undertow-core-1.0.15.Final.jar:1.0.15.Final]
        at io.undertow.servlet.handlers.security.ServletConfidentialityConstraintHandler.handleRequest(ServletConfidentialityConstraintHandler.java:61) [undertow-servlet-1.0.15.Final.jar:1.0.15.Final]
        at io.undertow.security.handlers.AuthenticationMechanismsHandler.handleRequest(AuthenticationMechanismsHandler.java:58) [undertow-core-1.0.15.Final.jar:1.0.15.Final]
        at io.undertow.servlet.handlers.security.CachedAuthenticatedSessionHandler.handleRequest(CachedAuthenticatedSessionHandler.java:70) [undertow-servlet-1.0.15.Final.jar:1.0.15.Final]
        at io.undertow.security.handlers.NotificationReceiverHandler.handleRequest(NotificationReceiverHandler.java:50) [undertow-core-1.0.15.Final.jar:1.0.15.Final]
        at io.undertow.security.handlers.SecurityInitialHandler.handleRequest(SecurityInitialHandler.java:76) [undertow-core-1.0.15.Final.jar:1.0.15.Final]
        at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:25) [undertow-core-1.0.15.Final.jar:1.0.15.Final]
        at org.wildfly.extension.undertow.security.jacc.JACCContextIdHandler.handleRequest(JACCContextIdHandler.java:61)
        at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:25) [undertow-core-1.0.15.Final.jar:1.0.15.Final]
        at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:25) [undertow-core-1.0.15.Final.jar:1.0.15.Final]
        at io.undertow.servlet.handlers.ServletInitialHandler.handleFirstRequest(ServletInitialHandler.java:240) [undertow-servlet-1.0.15.Final.jar:1.0.15.Final]
        at io.undertow.servlet.handlers.ServletInitialHandler.dispatchRequest(ServletInitialHandler.java:227) [undertow-servlet-1.0.15.Final.jar:1.0.15.Final]
        at io.undertow.servlet.handlers.ServletInitialHandler.access$000(ServletInitialHandler.java:73) [undertow-servlet-1.0.15.Final.jar:1.0.15.Final]
        at io.undertow.servlet.handlers.ServletInitialHandler$1.handleRequest(ServletInitialHandler.java:146) [undertow-servlet-1.0.15.Final.jar:1.0.15.Final]
        at io.undertow.server.Connectors.executeRootHandler(Connectors.java:177) [undertow-core-1.0.15.Final.jar:1.0.15.Final]
        at io.undertow.server.HttpServerExchange$1.run(HttpServerExchange.java:727) [undertow-core-1.0.15.Final.jar:1.0.15.Final]
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) [rt.jar:1.8.0_181]
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) [rt.jar:1.8.0_181]
        at java.lang.Thread.run(Thread.java:748) [rt.jar:1.8.0_181]
Caused by: java.lang.IllegalAccessError: tried to access class javax.mail.Session$1 from class javax.mail.Session
        at javax.mail.Session.loadProviders(Session.java:900) [javax.mail-1.5.1.jar:1.5.1]
        at javax.mail.Session.<init>(Session.java:216) [javax.mail-1.5.1.jar:1.5.1]
        at javax.mail.Session.getDefaultInstance(Session.java:316) [javax.mail-1.5.1.jar:1.5.1]
        at javax.mail.Session.getDefaultInstance(Session.java:356) [javax.mail-1.5.1.jar:1.5.1]
        at com.hibu.activiti.delegates.cpq.billingjob.AlertBillingErrorDelegate.execute(AlertBillingErrorDelegate.java:65)

17:55:33038错误[io.undertow.request]（默认任务-39）UT005023:异常处理请求到/hibu activiti rest/service/runtime/process实例：org.springframework.web.util.NestedServletException:处理程序处理失败；嵌套异常是java.lang.IllegalAccessError:试图从类javax.mail.Session访问类javax.mail.Session$1
位于org.springframework.web.servlet.DispatcherServlet.triggerAfterCompletionWithError（DispatcherServlet.java:1287）[spring-webmvc-4.1.5.RELEASE.jar:4.1.5.RELEASE]
在org.springframework.web.servlet.DispatcherServlet.doDispatch（DispatcherServlet.java:961）[spring-webmvc-4.1.5.RELEASE.jar:4.1.5.RELEASE]
位于org.springframework.web.servlet.DispatcherServlet.doService（DispatcherServlet.java:877）[spring-webmvc-4.1.5.RELEASE.jar:4.1.5.RELEASE]
在org.springframework.web.servlet.FrameworkServlet.processRequest（FrameworkServlet.java:966）[spring-webmvc-4.1.5.RELEASE.jar:4.1.5.RELEASE]
位于org.springframework.web.servlet.FrameworkServlet.doPost（FrameworkServlet.java:868）[spring-webmvc-4.1.5.RELEASE.jar:4.1.5.RELEASE]
在javax.servlet.http.HttpServlet.service（HttpServlet.java:707）[jboss-servlet-api_3.1_spec-1.0.0.Final.jar:1.0.0.Final]
在org.springframework.web.servlet.FrameworkServlet.service（FrameworkServlet.java:842）[spring-webmvc-4.1.5.RELEASE.jar:4.1.5.RELEASE]
在javax.servlet.http.HttpServlet.service（HttpServlet.java:790）[jboss-servlet-api_3.1_spec-1.0.0.Final.jar:1.0.0.Final]
在io.undertow.servlet.handlers.ServletHandler.HandlerRequest（ServletHandler.java:85）[undertow-servlet-1.0.15.Final.jar:1.0.15.Final]
位于io.undertow.servlet.handlers.security.ServletSecurityRoleHandler.HandlerRequest（ServletSecurityRoleHandler.java:61）[undertow-servlet-1.0.15.Final.jar:1.0.15.Final]
位于io.undertow.servlet.handlers.ServletDispatchingHandler.HandlerRequest（ServletDispatchingHandler.java:36）[undertow-servlet-1.0.15.Final.jar:1.0.15.Final]
位于org.wildfly.extension.undertow.security.SecurityContextAssociationHandler.HandlerRequest（SecurityContextAssociationHandler.java:78）
在io.undertow.server.handlers.PredicateHandler.handleRequest（PredicateHandler.java:25）[undertow-core-1.0.15.Final.jar:1.0.15.Final]
位于io.undertow.servlet.handlers.security.SSLInformationAssociationHandler.handleRequest（SSLInformationAssociationHandler.java:113）[undertow-servlet-1.0.15.Final.jar:1.0.15.Final]
位于io.undertow.servlet.handlers.security.ServletAuthenticationCallHandler.HandlerRequest（ServletAuthenticationCallHandler.java:56）[undertow-servlet-1.0.15.Final.jar:1.0.15.Final]
在io.undertow.server.handlers.PredicateHandler.handleRequest（PredicateHandler.java:25）[undertow-core-1.0.15.Final.jar:1.0.15.Final]
位于io.undertow.security.handlers.AbstractSecretentityHandler.HandlerRequest（AbstractSecretentityHandler.java:45）[undertow-core-1.0.15.Final.jar:1.0.15.Final]
位于io.undertow.servlet.handlers.security.ServletSecretentityConstraintHandler.HandlerRequest（ServletSecretentityConstraintHandler.java:61）[undertow-servlet-1.0.15.Final.jar:1.0.15.Final]
在io.undertow.security.handlers.AuthenticationMechanismsHandler.HandlerRequest（AuthenticationMechanismsHandler.java:58）[undertow-core-1.0.15.Final.jar:1.0.15.Final]
位于io.undertow.servlet.handlers.security.CachedAuthenticatedSessionHandler.HandlerRequest（CachedAuthenticatedSessionHandler.java:70）[undertow-servlet-1.0.15.Final.jar:1.0.15.Final]
在io.undertow.security.handlers.NotificationReceiverHandler.HandlerRequest（NotificationReceiverHandler.java:50）[undertow-core-1.0.15.Final.jar:1.0.15.Final]
在io.undertow.security.handlers.SecurityInitialHandler.HandlerRequest（SecurityInitialHandler.java:76）[undertow-core-1.0.15.Final.jar:1.0.15.Final]
在io.undertow.server.handlers.PredicateHandler.handleRequest（PredicateHandler.java:25）[undertow-core-1.0.15.Final.jar:1.0.15.Final]
位于org.wildfly.extension.undertow.security.jacc.jaccontextidhandler.handleRequest（jaccontextidhandler.java:61）
在io.undertow.server.handlers.PredicateHandler.handleRequest（PredicateHandler.java:25）[undertow-core-1.0.15.Final.jar:1.0.15.Final]
在io.undertow.server.handlers.PredicateHandler.handleRequest（PredicateHandler.java:25）[undertow-core-1.0.15.Final.jar:1.0.15.Final]
位于io.undertow.servlet.handlers.ServletiInitialHandler.handleFirstRequest（ServletialHandler.java:240）[undertow-servlet-1.0.15.Final.jar:1.0.15.Final]
在io.undertow.servlet.handlers.ServletiInitialHandler.dispatchRequest（ServletialHandler.java:227）[undertow-servlet-1.0.15.Final.jar:1.0.15.Final]
在io.undertow.servlet.handlers.ServletInitialHandler.access$000（ServletInitialHandler.java:73）[undertow-servlet-1.0.15.Final.jar:1.0.15.Final]
在io.undertow.servlet.handlers.ServletialHandler$1.HandlerRequest（ServletialHandler.java:146）[undertow-servlet-1.0.15.Final.jar:1.0.15.Final]
在io.undertow.server.Connectors.executeRootHandler（Connectors.java:177）[undertow-core-1.0.15.Final.jar:1.0.15.Final]
在io.undertow.server.HttpServerExchange$1.run（HttpServerExchange.java:727）[undertow-core-1.0.15.Final.jar:1.0.15.Final]
位于java.util.concurrent.ThreadPoolExecutor.runWorker（ThreadPoolExecutor.java:1149）[rt.jar:1.8.0_181]
位于java.util.concurrent.ThreadPoolExecutor$Worker.run（ThreadPoolExecutor.java:624）[rt.jar:1.8.0_181]
在java.lang.Thread.run（Thread.java:748）[rt.jar:1.8.0_181]
原因：java.lang.IllegalAccessError:试图从类javax.mail.Session访问类javax.mail.Session$1
在javax.mail.Session.loadProviders（Session.java