使用多租户 org.apache.catalina.startup.HostConfig.deployWAR 在 tomcat 中部署战争时出错文件部署期间出错答案

【问题标题】：Error to deploy war in tomcat with multitenant org.apache.catalina.startup.HostConfig.deployWAR Error during file deployment使用多租户 org.apache.catalina.startup.HostConfig.deployWAR 在 tomcat 中部署战争时出错文件部署期间出错
【发布时间】：2021-01-18 06:44:02
【问题描述】：

对不起，我的英语不好，

我有以下代码，使用 spring boot 2.4 制作。与 Spring 工具一起用作 Ide Eclipse。允许您从文件夹中获取三个名为 db1.properties db2.properties 等的文档。

        @Configuration
    public class MultitenantConfiguration {
        
        @Autowired
        private DataSourceProperties properties;
        
        @Bean
        @ConfigurationProperties(prefix="spring.datasource")
        public DataSource dataSource() {
            File[] files = Paths.get("src/main/resources/tenants").toFile().listFiles();
            Map<Object,Object> resolvedDataSources = new HashMap<>();
            
            for(File propertyFile : files) {
                Properties tenantProperties = new Properties();
                DataSourceBuilder dataSourceBuilder = DataSourceBuilder.create(this.getClass().getClassLoader());
                try {
                    tenantProperties.load(new FileInputStream(propertyFile));
                    
                    String tenantId = tenantProperties.getProperty("name");
                    
                    dataSourceBuilder.driverClassName(properties.getDriverClassName())
                    .url(tenantProperties.getProperty("datasource.url"))
                    .username(tenantProperties.getProperty("datasource.username"))
                    .password(tenantProperties.getProperty("datasource.password"));
                    
                    if(properties.getType() != null) {
                        dataSourceBuilder.type(properties.getType());
                    }
                    
                    resolvedDataSources.put(tenantId, dataSourceBuilder.build());
                    
                }catch (IOException e) {
                    e.printStackTrace();
    
                    return null;
                }
            
            }
            
            MultitenantDataSource dataSource = new MultitenantDataSource();
            dataSource.setDefaultTargetDataSource(defaultDataSource());
            dataSource.setTargetDataSources(resolvedDataSources);
            
            dataSource.afterPropertiesSet();
    
            return dataSource;
        }
        
        private DataSource defaultDataSource() {
            DataSourceBuilder dataSourceBuilder = DataSourceBuilder.create(this.getClass().getClassLoader())
                    .driverClassName(properties.getDriverClassName())
                    .url(properties.getUrl())
                    .username(properties.getUsername())
                    .password(properties.getPassword());
    
            if(properties.getType() != null) {
                dataSourceBuilder.type(properties.getType());
            }
    
            return dataSourceBuilder.build();
        }
    
    }

当我编译我的项目时，我没有错误。但是当我在 tomcat 中部署它时，它会显示以下内容

21 19:22:18.728 INFORMACIÓN [http-nio-8090-exec-62] org.apache.catalina.startup.HostConfig.deployWAR Despliegue del archivo [C:\Program Files\Apache Software Foundation\Tomcat 9.0\webapps\redlinev12v2-2.war] de la aplicación web
15-Jan-2021 19:22:26.087 INFORMACIÓN [http-nio-8090-exec-62] org.apache.jasper.servlet.TldScanner.scanJars Al menos un JAR, que se ha explorado buscando TLDs, aún no contenía TLDs. Activar historial de depuración para este historiador para una completa lista de los JARs que fueron explorados y de los que nos se halló TLDs. Saltarse JARs no necesarios durante la exploración puede dar lugar a una mejora de tiempo significativa en el arranque y compilación de JSP .
15-Jan-2021 19:22:30.588 GRAVE [http-nio-8090-exec-62] org.apache.catalina.startup.HostConfig.deployWAR Error durante el despliegue del archivo [C:\Program Files\Apache Software Foundation\Tomcat 9.0\webapps\redlinev12v2-2.war] de la aplicación web
    java.lang.IllegalStateException: Error starting child
        at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:720)
        at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:690)
        at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:706)
        at org.apache.catalina.startup.HostConfig.deployWAR(HostConfig.java:978)
        at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:493)
        at org.apache.catalina.startup.HostConfig.check(HostConfig.java:1642)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
        at java.lang.reflect.Method.invoke(Unknown Source)
        at org.apache.tomcat.util.modeler.BaseModelMBean.invoke(BaseModelMBean.java:288)
        at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.invoke(Unknown Source)
        at com.sun.jmx.mbeanserver.JmxMBeanServer.invoke(Unknown Source)
        at org.apache.catalina.manager.ManagerServlet.check(ManagerServlet.java:1596)
        at org.apache.catalina.manager.HTMLManagerServlet.upload(HTMLManagerServlet.java:294)
        at org.apache.catalina.manager.HTMLManagerServlet.doPost(HTMLManagerServlet.java:212)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:652)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:733)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
        at org.apache.catalina.filters.CsrfPreventionFilter.doFilter(CsrfPreventionFilter.java:211)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
        at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
        at org.apache.catalina.filters.HttpHeaderSecurityFilter.doFilter(HttpHeaderSecurityFilter.java:126)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
        at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:202)
        at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:97)
        at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:667)
        at org.apache.catalina.valves.RequestFilterValve.process(RequestFilterValve.java:348)
        at org.apache.catalina.valves.RemoteAddrValve.invoke(RemoteAddrValve.java:53)
        at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:143)
        at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92)
        at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:690)
        at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:78)
        at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343)
        at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:374)
        at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65)
        at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:888)
        at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1597)
        at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
        at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
        at java.lang.Thread.run(Unknown Source)
    Caused by: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost].StandardContext[/redlinev12v2-2]]
        at org.apache.catalina.util.LifecycleBase.handleSubClassException(LifecycleBase.java:440)
        at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:198)
        at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:717)
        ... 47 more
    Caused by: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'org.springframework.boot.autoconfigure.orm.jpa.HibernateJpaConfiguration': Unsatisfied dependency expressed through constructor parameter 0; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'dataSource' defined in class path resource [com/softdelsur/redlinev12/MultitenantConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [javax.sql.DataSource]: Factory method 'dataSource' threw exception; nested exception is java.lang.NullPointerException
        at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:800)
        at org.springframework.beans.factory.support.ConstructorResolver.autowireConstructor(ConstructorResolver.java:229)
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.autowireConstructor(AbstractAutowireCapableBeanFactory.java:1356)
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1206)
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:571)
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:531)
        at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:335)
        at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:234)
        at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:333)
        at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:208)
        at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:410)
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1336)
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1179)
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:571)
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:531)
        at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:335)
        at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:234)
        at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:333)
        at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:208)
        at org.springframework.context.support.AbstractApplicationContext.getBean(AbstractApplicationContext.java:1159)
        at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:913)
        at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:588)
        at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:144)
        at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:767)
        at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:759)
        at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:426)
        at org.springframework.boot.SpringApplication.run(SpringApplication.java:326)
        at org.springframework.boot.web.servlet.support.SpringBootServletInitializer.run(SpringBootServletInitializer.java:173)
        at org.springframework.boot.web.servlet.support.SpringBootServletInitializer.createRootApplicationContext(SpringBootServletInitializer.java:153)
        at org.springframework.boot.web.servlet.support.SpringBootServletInitializer.onStartup(SpringBootServletInitializer.java:95)
        at org.springframework.web.SpringServletContainerInitializer.onStartup(SpringServletContainerInitializer.java:174)
        at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5166)
        at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)
        ... 48 more
    Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'dataSource' defined in class path resource [com/softdelsur/redlinev12/MultitenantConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [javax.sql.DataSource]: Factory method 'dataSource' threw exception; nested exception is java.lang.NullPointerException
        at org.springframework.beans.factory.support.ConstructorResolver.instantiate(ConstructorResolver.java:658)
        at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:486)
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1336)
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1179)
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:571)
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:531)
        at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:335)
        at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:234)
        at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:333)
        at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:208)
        at org.springframework.beans.factory.config.DependencyDescriptor.resolveCandidate(DependencyDescriptor.java:276)
        at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1367)
        at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1287)
        at org.springframework.beans.factory.support.ConstructorResolver.resolveAutowiredArgument(ConstructorResolver.java:887)
        at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:791)
        ... 80 more
    Caused by: org.springframework.beans.BeanInstantiationException: Failed to instantiate [javax.sql.DataSource]: Factory method 'dataSource' threw exception; nested exception is java.lang.NullPointerException
        at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:185)
        at org.springframework.beans.factory.support.ConstructorResolver.instantiate(ConstructorResolver.java:653)
        ... 94 more
    Caused by: java.lang.NullPointerException
        at com.softdelsur.redlinev12.MultitenantConfiguration.dataSource(MultitenantConfiguration.java:34)
        at com.softdelsur.redlinev12.MultitenantConfiguration$$EnhancerBySpringCGLIB$$d986e6f.CGLIB$dataSource$0(<generated>)
        at com.softdelsur.redlinev12.MultitenantConfiguration$$EnhancerBySpringCGLIB$$d986e6f$$FastClassBySpringCGLIB$$266f86a6.invoke(<generated>)
        at org.springframework.cglib.proxy.MethodProxy.invokeSuper(MethodProxy.java:244)
        at org.springframework.context.annotation.ConfigurationClassEnhancer$BeanMethodInterceptor.intercept(ConfigurationClassEnhancer.java:331)
        at com.softdelsur.redlinev12.MultitenantConfiguration$$EnhancerBySpringCGLIB$$d986e6f.dataSource(<generated>)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
        at java.lang.reflect.Method.invoke(Unknown Source)
        at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:154)
        ... 95 more
15-Jan-2021 19:22:30.590 INFORMACIÓN [http-nio-8090-exec-62] org.apache.catalina.startup.HostConfig.deployWAR Deployment of web application archive [C:\Program Files\Apache Software Foundation\Tomcat 9.0\webapps\redlinev12v2-2.war] has finished in [11.862] ms

如果我评论 Bean 运行良好，我不知道如何继续前进，我试图在另一个路径中找到文件，但我以同样的方式继续。我希望你的帮助

【问题讨论】：

堆栈跟踪显示 NullPointerException 发生在 MultitenantConfiguration.java 的 ~43~ 行（编辑：哎呀，34）。那是哪条线？
第 34 行，但是是的，您需要告诉我们那是哪一行。
看起来此代码假定租户配置文件位于 src/main/resources/tenants... 下的文件系统上，而在部署应用程序时情况并非如此。
不要假设它们在文件系统上，也许您可以使用PathMatchingResourcePatternResolver 或stackoverflow.com/questions/3923129/… 中提到的其他技术之一来加载它们
@dnault 第 34 行逐个文件获取并允许我读取 (File propertyFile : files) 的内容。这遵循您关于使用 PathMatchingResourcePatternResolver 的建议，我将很快发表评论

标签： java spring-boot maven tomcat8 multi-tenant

【解决方案1】：

通过改变查找配置文件的方式解决了问题

Map<Object,Object> resolvedDataSources = new HashMap<>();
        PathMatchingResourcePatternResolver resourceLoader = new PathMatchingResourcePatternResolver();
        try {
            Resource[] resources = resourceLoader.getResources("/tenants/*.properties");
            for (Resource resource : resources) {
                try{
                System.out.println("Este es el recurso: "+resource);
                Properties tenantProperties = new Properties();
                DataSourceBuilder dataSourceBuilder = DataSourceBuilder.create(this.getClass().getClassLoader());
                File templateFile = resource.getFile();
                
                tenantProperties.load(new FileInputStream(templateFile));
                String tenantId = tenantProperties.getProperty("name");
                
                dataSourceBuilder.driverClassName(properties.getDriverClassName())
                .url(tenantProperties.getProperty("datasource.url"))
                .username(tenantProperties.getProperty("datasource.username"))
                .password(tenantProperties.getProperty("datasource.password"));
                
                if(properties.getType() != null) {
                    dataSourceBuilder.type(properties.getType());
                }
                
                resolvedDataSources.put(tenantId, dataSourceBuilder.build());
                }catch (IOException e) {
                    System.out.println("Fallo al abrir los archivos de db");
                    e.printStackTrace();

                    return null;
                }
            }
            
        } catch (IOException e) {
            System.out.println("Archivo de configuración no encontrado");
            e.printStackTrace();
        }

使用 PathMatchingResourcePatternResolver 注释 @dnault

【讨论】：