ICode9
精准搜索请尝试： 精确搜索
首页
编程语言>
数据库
系统相关
互联网
其他分享
Python
Java
JavaScript
android
PHP
首页 > 编程语言> 文章详细

java-无法在AWS EC2上安装的Tomcat 6下读取/写入文件

2019-12-01 08:13:19  阅读：237  来源： 互联网

标签：amazon-web-services amazon-ec2 read-write tomcat java


我有一个在Tomcat 6上运行的webapp,一个类检查目录是否存在,如果不存在则创建它-

// make sure path exists
File f = new File(value);
if (!f.exists()) {
    if (!f.mkdirs()) {
        throw new RuntimeException("Failed creating directory " + value);
    }
}

现在,当在本地计算机上运行时,一切正常,但是在EC2实例上执行时,我在catalina.out看到以下内容-

2012-05-30 06:57:28 main ConfigService [INFO] Directory path not exists, creating /usr/share/tomcat6/webapps/ROOT/WEB-INF/data/temp/currency
2012-05-30 06:57:28 main DefaultListableBeanFactory [INFO] Destroying singletons in org.springframework.beans.factory.support.DefaultListableBeanFactory@1b4c1d7: defining beans [fetchAppRankingJob,fetchCurrencyRatesJob,fetchReviewsJob,sendDailyReportJob,importSalesReportJob,fetchSalesReportJob,processSalesReportsJob,org.springframework.context.annotation.internalConfigurationAnnotationProcessor,org.springframework.context.annotation.internalAutowiredAnnotationProcessor,org.springframework.context.annotation.internalRequiredAnnotationProcessor,org.springframework.context.annotation.internalCommonAnnotationProcessor,org.springframework.aop.config.internalAutoProxyCreator,org.springframework.transaction.annotation.AnnotationTransactionAttributeSource#0,org.springframework.transaction.interceptor.TransactionInterceptor#0,org.springframework.transaction.config.internalTransactionAdvisor,org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping#0,org.springframework.format.support.FormattingConversionServiceFactoryBean#0,org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter#0,org.springframework.web.servlet.handler.MappedInterceptor#0,org.springframework.web.servlet.mvc.method.annotation.ExceptionHandlerExceptionResolver#0,org.springframework.web.servlet.mvc.annotation.ResponseStatusExceptionResolver#0,org.springframework.web.servlet.mvc.support.DefaultHandlerExceptionResolver#0,org.springframework.web.servlet.handler.BeanNameUrlHandlerMapping,org.springframework.web.servlet.mvc.HttpRequestHandlerAdapter,org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter,org.springframework.scheduling.support.ScheduledMethodRunnable#0,org.springframework.scheduling.support.ScheduledMethodRunnable#1,org.springframework.scheduling.support.ScheduledMethodRunnable#2,org.springframework.scheduling.support.ScheduledMethodRunnable#3,org.springframework.scheduling.support.ScheduledMethodRunnable#4,org.springframework.scheduling.config.ScheduledTaskRegistrar#0,appsales-scheduler,org.springframework.context.annotation.ConfigurationClassPostProcessor$ImportAwareBeanPostProcessor#0]; root of factory hierarchy
2012-05-30 06:57:28 main ContextLoader [ERROR] Context initialization failed
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'fetchCurrencyRatesJob' defined in file [/var/lib/tomcat6/webapps/ROOT/WEB-INF/classes/com/appround/collect/currency/FetchCurrencyRatesJob.class]: Instantiation of bean failed; nested exception is org.springframework.beans.BeanInstantiationException: Could not instantiate bean class [com.appround.collect.currency.FetchCurrencyRatesJob]: Constructor threw exception; nested exception is java.lang.RuntimeException: Failed creating directory /usr/share/tomcat6/webapps/ROOT/WEB-INF/data/temp/currency
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateBean(AbstractAutowireCapableBeanFactory.java:997)
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:943)
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:485)
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:456)
        at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:294)
        at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:225)
        at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:291)
        at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:193)
        at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:585)
        at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:913)
        at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:464)
        at org.springframework.web.context.ContextLoader.configureAndRefreshWebApplicationContext(ContextLoader.java:385)
        at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:284)
        at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:111)
        at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4206)
        at org.apache.catalina.core.StandardContext.start(StandardContext.java:4705)
        at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:799)
        at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:779)
        at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:601)
        at org.apache.catalina.startup.HostConfig.deployDirectory(HostConfig.java:1079)
        at org.apache.catalina.startup.HostConfig.deployDirectories(HostConfig.java:1002)
        at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:506)
        at org.apache.catalina.startup.HostConfig.start(HostConfig.java:1317)
        at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:324)
        at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:142)
        at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1065)
        at org.apache.catalina.core.StandardHost.start(StandardHost.java:840)
        at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1057)
        at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:463)
        at org.apache.catalina.core.StandardService.start(StandardService.java:525)
        at org.apache.catalina.core.StandardServer.start(StandardServer.java:754)
        at org.apache.catalina.startup.Catalina.start(Catalina.java:595)
        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.catalina.startup.Bootstrap.start(Bootstrap.java:289)
        at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:414)
Caused by: org.springframework.beans.BeanInstantiationException: Could not instantiate bean class [com.appround.collect.currency.FetchCurrencyRatesJob]: Constructor threw exception; nested exception is java.lang.RuntimeException: Failed creating directory /usr/share/tomcat6/webapps/ROOT/WEB-INF/data/temp/currency
        at org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:162)
        at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:76)
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateBean(AbstractAutowireCapableBeanFactory.java:990)
        ... 37 more
Caused by: java.lang.RuntimeException: Failed creating directory /usr/share/tomcat6/webapps/ROOT/WEB-INF/data/temp/currency
        at com.appround.collect.ConfigService.getPathProperty(ConfigService.java:109)
        at com.appround.collect.currency.FetchCurrencyRatesJob.<init>(FetchCurrencyRatesJob.java:18)
        at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
        at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
        at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
        at java.lang.reflect.Constructor.newInstance(Unknown Source)
        at org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:147)
        ... 39 more

我更喜欢写到/ home / ec2-user / collect / data,尝试写到我的webapp目录,因为它应该对WEB-INF文件夹具有写权限.

我尝试授予文件权限写入/读取到/usr/share/tomcat6/conf/catalina.policy的文件夹-

grant {
    permission java.io.FilePermission "/home/ec2-user/collect/data", "read, write";
    permission java.io.FilePermission "/home/ec2-user/collect/data/*", "read, write";
}

仍然没有运气.

有什么线索吗？

谢谢！

解决方法:

由于您提到了ec2-user,因此我假设您正在使用Amazon Linux.

在尝试创建新文件夹的父文件夹/usr/share / tomcat6 / webapps /上设置了哪些权限？通常,运行Tomcat的用户(也称为tomcat)在那里没有写权限,除非您使用chmod u w对其进行了明确设置.

此外,除非您授予用户该目录的权限,否则tomcat用户不允许写入其他用户的家(在您的情况下为/ home / ec2-user /).您的示例在此处有点令人困惑,因为您提到尝试写入webapps文件夹,但在策略文件中指定了ec2-user的主目录.

通常,如果要创建临时数据文件,建议使用File.createTempFile(..)创建它们,它们会自动放置在标准临时文件夹中.如果您想自己为数据文件创建一个专用文件夹,则/ var / tmp /可能更适合,因为它是临时文件的标准unix位置(/ tmp /可能在重新启动后清除,因此请不要放置任何永久文件.文件在那里).

标签：amazon-web-services,amazon-ec2,read-write,tomcat,java
来源： https://codeday.me/bug/20191201/2079547.html

本站声明： 1. iCode9 技术分享网（下文简称本站）提供的所有内容，仅供技术学习、探讨和分享；
2. 关于本站的所有留言、评论、转载及引用，纯属内容发起人的个人观点，与本站观点和立场无关；
3. 关于本站的所有言论和文字，纯属内容发起人的个人观点，与本站观点和立场无关；
4. 本站文章均是网友提供，不完全保证技术分享内容的完整性、准确性、时效性、风险性和版权归属；如您发现该文章侵犯了您的权益，可联系我们第一时间进行删除；
5. 本站为非盈利性的个人网站，所有内容不会用来进行牟利，也不会利用任何形式的广告来间接获益，纯粹是为了广大技术爱好者提供技术内容和技术思想的分享性交流网站。

关于我们 | 联系我们 | 留言反馈

专注分享技术，共同学习，共同进步。侵权联系[81616952@qq.com]

Copyright (C)ICode9.com, All Rights Reserved.

ICode9版权所有