如何解决EAP 7.3: java.lang.ClassNotFoundException: # 授权给 Apache Software Foundation (ASF) 一个或多个 - 仅在独立模式下
我们有一个 web 应用程序 (war) 在域模式下成功部署到 JBoss EAP 7.3（使用默认配置文件），但是在独立模式下部署（基于默认的 standalone.xml 配置）它失败了：
14:47:40,342 ERROR [org.jboss.msc.service.fail] (ServerService Thread Pool -- 88) MSC000001: Failed to start service jboss.deployment.unit."app.war".undertow-deployment: org.jboss.msc.service.StartException in service jboss.deployment.unit."app.war".undertow-deployment: java.lang.RuntimeException: javax.el.ELException: Provider # Licensed to the Apache Software Foundation (ASF) under one or more not found
at org.wildfly.extension.undertow.deployment.UndertowDeploymentService$1.run(UndertowDeploymentService.java:81)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at org.jboss.threads.ContextClassLoaderSavingRunnable.run(ContextClassLoaderSavingRunnable.java:35)
at org.jboss.threads.EnhancedQueueExecutor.safeRun(EnhancedQueueExecutor.java:1982)
at org.jboss.threads.EnhancedQueueExecutor$ThreadBody.doRunTask(EnhancedQueueExecutor.java:1486)
at org.jboss.threads.EnhancedQueueExecutor$ThreadBody.run(EnhancedQueueExecutor.java:1377)
at java.lang.Thread.run(Thread.java:748)
at org.jboss.threads.JBossthread.run(JBossthread.java:485)
Caused by: java.lang.RuntimeException: javax.el.ELException: Provider # Licensed to the Apache Software Foundation (ASF) under one or more not found
at io.undertow.servlet.core.DeploymentManagerImpl.deploy(DeploymentManagerImpl.java:254)
at org.wildfly.extension.undertow.deployment.UndertowDeploymentService.startContext(UndertowDeploymentService.java:96)
at org.wildfly.extension.undertow.deployment.UndertowDeploymentService$1.run(UndertowDeploymentService.java:78)
... 8 more
Caused by: javax.el.ELException: Provider # Licensed to the Apache Software Foundation (ASF) under one or more not found
at javax.el.FactoryFinder.newInstance(FactoryFinder.java:64)
at javax.el.FactoryFinder.find(FactoryFinder.java:103)
at javax.el.ExpressionFactory.newInstance(ExpressionFactory.java:140)
at javax.el.ELUtil.getExpressionFactory(ELUtil.java:185)
at javax.el.ELManager.getExpressionFactory(ELManager.java:38)
at org.apache.jasper.runtime.JspApplicationContextImpl.<init>(JspApplicationContextImpl.java:49)
at org.apache.jasper.runtime.JspApplicationContextImpl.getInstance(JspApplicationContextImpl.java:78)
at org.apache.jasper.runtime.JspFactoryImpl.getJspApplicationContext(JspFactoryImpl.java:218)
at org.wildfly.extension.undertow.deployment.JspInitializationListener.contextinitialized(JspInitializationListener.java:51)
at io.undertow.servlet.core.ApplicationListeners.contextinitialized(ApplicationListeners.java:187)
at io.undertow.servlet.core.DeploymentManagerImpl$1.call(DeploymentManagerImpl.java:217)
at io.undertow.servlet.core.DeploymentManagerImpl$1.call(DeploymentManagerImpl.java:186)
at io.undertow.servlet.core.ServletRequestContextThreadSetupAction$1.call(ServletRequestContextThreadSetupAction.java:42)
at io.undertow.servlet.core.ContextClassLoaderSetupAction$1.call(ContextClassLoaderSetupAction.java:43)
at org.wildfly.extension.undertow.security.SecurityContextThreadSetupAction.lambda$create$0(SecurityContextThreadSetupAction.java:105)
at org.wildfly.extension.undertow.deployment.UndertowDeploymentInfoService$UndertowThreadSetupAction.lambda$create$0(UndertowDeploymentInfoService.java:1504)
at org.wildfly.extension.undertow.deployment.UndertowDeploymentInfoService$UndertowThreadSetupAction.lambda$create$0(UndertowDeploymentInfoService.java:1504)
at org.wildfly.extension.undertow.deployment.UndertowDeploymentInfoService$UndertowThreadSetupAction.lambda$create$0(UndertowDeploymentInfoService.java:1504)
at org.wildfly.extension.undertow.deployment.UndertowDeploymentInfoService$UndertowThreadSetupAction.lambda$create$0(UndertowDeploymentInfoService.java:1504)
at io.undertow.servlet.core.DeploymentManagerImpl.deploy(DeploymentManagerImpl.java:252)
... 10 more
Caused by: java.lang.classNotFoundException: # Licensed to the Apache Software Foundation (ASF) under one or more from [Module "deployment.app.war" from Service Module Loader]
at org.jboss.modules.ModuleClassLoader.findClass(ModuleClassLoader.java:255)
at org.jboss.modules.ConcurrentClassLoader.performloadClassUnchecked(ConcurrentClassLoader.java:410)
at org.jboss.modules.ConcurrentClassLoader.performloadClass(ConcurrentClassLoader.java:398)
at org.jboss.modules.ConcurrentClassLoader.loadClass(ConcurrentClassLoader.java:116)
at javax.el.FactoryFinder.newInstance(FactoryFinder.java:48)
... 29 more
14:47:40,351 ERROR [org.jboss.as.controller.management-operation] (Controller Boot Thread) WFLYCTL0013: Operation ("deploy") Failed - address: ([("deployment" => "app.war")]) - failure description: {"WFLYCTL0080: Failed services" => {"jboss.deployment.unit.\"app.war\".undertow-deployment" => "java.lang.RuntimeException: javax.el.ELException: Provider # Licensed to the Apache Software Foundation (ASF) under one or more not found
Caused by: java.lang.RuntimeException: javax.el.ELException: Provider # Licensed to the Apache Software Foundation (ASF) under one or more not found
Caused by: javax.el.ELException: Provider # Licensed to the Apache Software Foundation (ASF) under one or more not found
Caused by: java.lang.classNotFoundException: # Licensed to the Apache Software Foundation (ASF) under one or more from [Module \"deployment.app.war\" from Service Module Loader]"}}
战争和应用程序配置在这两种情况下是相同的。
JBoss 配置在两种情况下都尽可能接近。在域模式下，它基于默认配置文件，基本上只添加了一些资源。在独立模式下，它基于默认的 standalone.xml 并添加了相同的资源集。因此，从这个角度来看，我找不到行为差异的任何原因。
到目前为止，我们已经将其跟踪到 tomcat-embed-el-9.0.39.jar，由于某些 3rd 方依赖性，它包含在我们的战争中。此 jar 包含具有以下内容的 meta-inf/services/javax.el.ExpressionFactory：
# Licensed to the Apache Software Foundation (ASF) under one or more
# contributor license agreements. See the NOTICE file distributed with
# this work for additional information regarding copyright ownership.
# The ASF licenses this file to You under the Apache License,Version 2.0
# (the "License"); you may not use this file except in compliance with
# the License. You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing,software
# distributed under the License is distributed on an "AS IS" BASIS,# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
org.apache.el.ExpressionFactoryImpl
问题显然是第一行作为实际条目（例如类名）被读取和处理，即使它只是一个注释。 因此，它类似于影响 EAP 6 的以下旧问题： https://access.redhat.com/solutions/1270603（需要红帽登录）。
注意：我们在 JBoss EAP 7.3.0 和 7.3.6 上对此进行了测试，结果相同。
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