首页 \ 问答 \ Resque / Redis的套接字权限问题(Socket permission problems with Resque/Redis)

Resque / Redis的套接字权限问题(Socket permission problems with Resque/Redis)

 我试图在Passenger / Apache的简单Sinatra应用程序中使用Resque，但Resque试图访问Redis时会收到权限错误。 这种相同的错误发生在各种方法上，包括Resque.info和Resque.enqueue，并且无论redis-server是否实际运行 
 

 如果我在irb或ruby脚本中编写相同的代码，它运行良好。 
 

 我尝试切换哪些用户正在运行apache / passenger和redis，包括root。 
 

App 31099 stdout: 
App 31082 stderr: 2015-10-01 12:23:52 - Errno::EACCES - Permission denied - connect(2):
App 31082 stderr:       /usr/local/share/gems/gems/redis-3.2.1/lib/redis/connection/ruby.rb:122:in `connect_nonblock'
App 31082 stderr:       /usr/local/share/gems/gems/redis-3.2.1/lib/redis/connection/ruby.rb:122:in `connect_addrinfo'
App 31082 stderr:       /usr/local/share/gems/gems/redis-3.2.1/lib/redis/connection/ruby.rb:162:in `block in connect'
App 31082 stderr:       /usr/local/share/gems/gems/redis-3.2.1/lib/redis/connection/ruby.rb:160:in `each'
App 31082 stderr:       /usr/local/share/gems/gems/redis-3.2.1/lib/redis/connection/ruby.rb:160:in `each_with_index'
App 31082 stderr:       /usr/local/share/gems/gems/redis-3.2.1/lib/redis/connection/ruby.rb:160:in `connect'
App 31082 stderr:       /usr/local/share/gems/gems/redis-3.2.1/lib/redis/connection/ruby.rb:211:in `connect'
App 31082 stderr:       /usr/local/share/gems/gems/redis-3.2.1/lib/redis/client.rb:322:in `establish_connection'
App 31082 stderr:       /usr/local/share/gems/gems/redis-3.2.1/lib/redis/client.rb:94:in `block in connect'
App 31082 stderr:       /usr/local/share/gems/gems/redis-3.2.1/lib/redis/client.rb:279:in `with_reconnect'
App 31082 stderr:       /usr/local/share/gems/gems/redis-3.2.1/lib/redis/client.rb:93:in `connect'
App 31082 stderr:       /usr/local/share/gems/gems/redis-3.2.1/lib/redis/client.rb:350:in `ensure_connected'
App 31082 stderr:       /usr/local/share/gems/gems/redis-3.2.1/lib/redis/client.rb:207:in `block in process'
App 31082 stderr:       /usr/local/share/gems/gems/redis-3.2.1/lib/redis/client.rb:292:in `logging'
App 31082 stderr:       /usr/local/share/gems/gems/redis-3.2.1/lib/redis/client.rb:206:in `process'
App 31082 stderr:       /usr/local/share/gems/gems/redis-3.2.1/lib/redis/client.rb:112:in `call'
App 31082 stderr:       /usr/local/share/gems/gems/redis-3.2.1/lib/redis.rb:1320:in `block in smembers'
App 31082 stderr:       /usr/local/share/gems/gems/redis-3.2.1/lib/redis.rb:37:in `block in synchronize'
App 31082 stderr:       /usr/share/ruby/monitor.rb:211:in `mon_synchronize'
App 31082 stderr:       /usr/local/share/gems/gems/redis-3.2.1/lib/redis.rb:37:in `synchronize'
App 31082 stderr:       /usr/local/share/gems/gems/redis-3.2.1/lib/redis.rb:1319:in `smembers'
App 31082 stderr:       /usr/local/share/gems/gems/redis-namespace-1.5.2/lib/redis/namespace.rb:393:in `call_with_namespace'
App 31082 stderr:       /usr/local/share/gems/gems/redis-namespace-1.5.2/lib/redis/namespace.rb:290:in `method_missing'
App 31082 stderr:       /usr/local/share/gems/gems/resque-1.25.2/lib/resque.rb:259:in `queues'
App 31082 stderr:       /usr/local/share/gems/gems/resque-1.25.2/lib/resque.rb:431:in `info'
App 31082 stderr:       /var/www/html/app.rb:29:in `block in <class:App>'


I'm trying to use Resque in a simple Sinatra app with Passenger/Apache, but get a permission error whenever Resque tries to access Redis. This same error happens with various methods, including Resque.info and Resque.enqueue, and it happens regardless of whether or not redis-server is actually running
 

If I write the same code in irb or a ruby script, it runs fine.
 

I have tried switching which users are running both apache/passenger and redis, including root.
 

App 31099 stdout: 
App 31082 stderr: 2015-10-01 12:23:52 - Errno::EACCES - Permission denied - connect(2):
App 31082 stderr:       /usr/local/share/gems/gems/redis-3.2.1/lib/redis/connection/ruby.rb:122:in `connect_nonblock'
App 31082 stderr:       /usr/local/share/gems/gems/redis-3.2.1/lib/redis/connection/ruby.rb:122:in `connect_addrinfo'
App 31082 stderr:       /usr/local/share/gems/gems/redis-3.2.1/lib/redis/connection/ruby.rb:162:in `block in connect'
App 31082 stderr:       /usr/local/share/gems/gems/redis-3.2.1/lib/redis/connection/ruby.rb:160:in `each'
App 31082 stderr:       /usr/local/share/gems/gems/redis-3.2.1/lib/redis/connection/ruby.rb:160:in `each_with_index'
App 31082 stderr:       /usr/local/share/gems/gems/redis-3.2.1/lib/redis/connection/ruby.rb:160:in `connect'
App 31082 stderr:       /usr/local/share/gems/gems/redis-3.2.1/lib/redis/connection/ruby.rb:211:in `connect'
App 31082 stderr:       /usr/local/share/gems/gems/redis-3.2.1/lib/redis/client.rb:322:in `establish_connection'
App 31082 stderr:       /usr/local/share/gems/gems/redis-3.2.1/lib/redis/client.rb:94:in `block in connect'
App 31082 stderr:       /usr/local/share/gems/gems/redis-3.2.1/lib/redis/client.rb:279:in `with_reconnect'
App 31082 stderr:       /usr/local/share/gems/gems/redis-3.2.1/lib/redis/client.rb:93:in `connect'
App 31082 stderr:       /usr/local/share/gems/gems/redis-3.2.1/lib/redis/client.rb:350:in `ensure_connected'
App 31082 stderr:       /usr/local/share/gems/gems/redis-3.2.1/lib/redis/client.rb:207:in `block in process'
App 31082 stderr:       /usr/local/share/gems/gems/redis-3.2.1/lib/redis/client.rb:292:in `logging'
App 31082 stderr:       /usr/local/share/gems/gems/redis-3.2.1/lib/redis/client.rb:206:in `process'
App 31082 stderr:       /usr/local/share/gems/gems/redis-3.2.1/lib/redis/client.rb:112:in `call'
App 31082 stderr:       /usr/local/share/gems/gems/redis-3.2.1/lib/redis.rb:1320:in `block in smembers'
App 31082 stderr:       /usr/local/share/gems/gems/redis-3.2.1/lib/redis.rb:37:in `block in synchronize'
App 31082 stderr:       /usr/share/ruby/monitor.rb:211:in `mon_synchronize'
App 31082 stderr:       /usr/local/share/gems/gems/redis-3.2.1/lib/redis.rb:37:in `synchronize'
App 31082 stderr:       /usr/local/share/gems/gems/redis-3.2.1/lib/redis.rb:1319:in `smembers'
App 31082 stderr:       /usr/local/share/gems/gems/redis-namespace-1.5.2/lib/redis/namespace.rb:393:in `call_with_namespace'
App 31082 stderr:       /usr/local/share/gems/gems/redis-namespace-1.5.2/lib/redis/namespace.rb:290:in `method_missing'
App 31082 stderr:       /usr/local/share/gems/gems/resque-1.25.2/lib/resque.rb:259:in `queues'
App 31082 stderr:       /usr/local/share/gems/gems/resque-1.25.2/lib/resque.rb:431:in `info'
App 31082 stderr:       /var/www/html/app.rb:29:in `block in <class:App>'


原文：https://stackoverflow.com/questions/32894832
更新时间：2021-12-25 18:12

最满意答案

 这似乎是Schematron任务中的一个错误。 即使任务本身位于子类加载器上，Ant任务加载Saxon XSLT处理器的方式也需要Saxon在系统类路径上。 
 

 乍一看，ValidatorFactory中的这段代码看起来足够明智： 
 

private TransformerFactory _factory = TransformerFactoryImpl.newInstance();

 

 （其中TransformerFactoryImpl是Saxon的TransformerFactory实现），但实际上TransformerFactoryImpl没有定义它自己的newInstance()方法，因此这是来自TransformerFactory的继承的newInstance ，它将根据javax.xml.transform.TransformerFactory的值查找合适的工厂javax.xml.transform.TransformerFactory系统属性。 Ant任务确实设置了这个系统属性 ： 
 

System.setProperty("javax.xml.transform.TransformerFactory",
      "net.sf.saxon.TransformerFactoryImpl");

 

 但TransformerFactory.newInstance()将在系统类加载器上查找此类，而不一定在加载schematron任务的类加载器上。 
 

 解决方法是将ValidatorFactory行120更改为简单 
 

private TransformerFactory _factory = new TransformerFactoryImpl();

 

 这将绕过所有的动态查找并直接实例化正确的类。 有了这个修复程序 
 

<taskdef name="schematron" 
 classname="com.schematron.ant.SchematronTask"
 classpath="lib/ant-schematron.jar:lib/saxon9he.jar"/>

 

 会正常工作。 
 

 我建议你向开发人员报告错误，但该项目看起来并不是特别活跃，所以你可能只需要建立自己的本地分支。 

This appears to be a bug in the Schematron task. The way the Ant task loads the Saxon XSLT processor would require Saxon to be on the system classpath even if the task itself is on a subsidiary classloader.
 

At first glance this code in ValidatorFactory looks sensible enough:
 

private TransformerFactory _factory = TransformerFactoryImpl.newInstance();

 

(where TransformerFactoryImpl is Saxon's implementation of TransformerFactory), but in fact TransformerFactoryImpl doesn't define a newInstance() method of its own so this is the inherited newInstance from TransformerFactory, which will look up an appropriate factory based on the value of the javax.xml.transform.TransformerFactory system property. The Ant task does set this system property:
 

System.setProperty("javax.xml.transform.TransformerFactory",
      "net.sf.saxon.TransformerFactoryImpl");

 

but TransformerFactory.newInstance() will look for this class on the system classloader, not necessarily on the classloader that loaded the schematron task.
 

The fix would be to change ValidatorFactory line 120 to simply
 

private TransformerFactory _factory = new TransformerFactoryImpl();

 

which would bypass all the dynamic lookup and instantiate the correct class directly. With this fix in place
 

<taskdef name="schematron" 
 classname="com.schematron.ant.SchematronTask"
 classpath="lib/ant-schematron.jar:lib/saxon9he.jar"/>

 

would work correctly.
 

I'd suggest you report the bug to the developers, but the project doesn't look particularly active so you may just have to build your own local fork instead...

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