JRuby PermGen 空间不足甚至在 ruby​​ 代码中使用 java 对象

Posted 2023-04-18

【中文标题】JRuby PermGen 空间不足甚至在 ruby​​ 代码中使用 java 对象

【英文标题】：JRuby PermGen out of space even use java objects in ruby code

【发布时间】：2012-06-22 13:36:28

【问题描述】：

说明：

如果我们使用 java 对象 jruby 也可以得到 permgen：

System.out.println("Initialazing..");
//Spring applicaton context
WebApplicationContext wac = (WebApplicationContext) AppContext.getApplicationContext();
// prepare path to internal ruby 
String scriptsPath = wac.getServletContext().getRealPath(RUBY_PATH);
String jrubyHome = wac.getServletContext().getRealPath("WEB-INF" + File.separator +     "jruby");
// Initializing Scripting container
ScriptingContainer container = new ScriptingContainer(isShared ?     LocalContextScope.SINGLETHREAD
            : LocalContextScope.THREADSAFE, LocalVariableBehavior.PERSISTENT);
// Configuring scriptingcontainer to avoid memory leaks
container.setCompileMode(RubyInstanceConfig.CompileMode.OFF);
System.setProperty("org.jruby.embed.compilemode", "OFF");
System.setProperty("jruby.compile.mode", "OFF");
// Setup ruby version
container.setCompatVersion(CompatVersion.RUBY1_9);
// Set jruby home
container.getProvider().getRubyInstanceConfig().setJRubyHome(jrubyHome);
List<String> loadPaths = new ArrayList<String>();
// load path
loadPaths.add(scriptsPath);
container.getProvider().setLoadPaths(loadPaths);
// ruby dispatcher initializing and run in simple mood
String fileName = scriptsPath + File.separator + "dispatcher_fake.rb";
// run scriplet
container.runScriptlet(PathType.ABSOLUTE, fileName);
// terminate container to cleanup memory without any effects
container.terminate();
container=null;

小脚本：

ENV['GEM_PATH'] = File.expand_path('../../jruby/1.9', __FILE__)
ENV['GEM_HOME'] = File.expand_path('../../jruby/1.9', __FILE__)
ENV['BUNDLE_BIN_PATH'] = File.expand_path('../../jruby/1.9/gems/bundler-1.0.18/bin/bundle', __FILE__)

require 'java'

ROOT_DIR = File.dirname(__FILE__)
require File.join(ROOT_DIR, "base", "xsi.rb")

# require java classes
import org.jsoup.Jsoup
import org.jsoup.nodes.Document
import org.jsoup.nodes.Element


module JavaListing
  include_package "com.util.listing"
end

class A
  include JavaListing
  def run
    1000.times do |index|
      puts "iterating #index"
      # java class property
      prop = JavaListing::Property.new
      prop.proNo = 111
      prop.remoteID = "1111"
      prop.ownerID = "1111"
      prop.advertiserID = "1111"
      prop.title = "Atite"
      prop.summary = "Asummury"
      prop.description = "Adescription"
      # prop.images << JavaListing::Image.new("111", "Acaption")
      prop.lat = 12.23
      prop.lng = 13.21
      #prop.address = JavaListing::Address.new("Acity", "Acountry")
      prop.location = "Alocation"
      prop.policy = JavaListing::Policy.new("AcheckinAt", "AcheckoutAt")
      prop.surfaceArea = "Asurfscearea"
      # prop.notes[index] = JavaListing::Note.new("Atitle", "Atext")
      prop.order = "Aorder"
      prop.map = JavaListing::Map.new(true, 14)
      # 
      doc = Jsoup.parse("<root><elements><element>Application Error  #index  </element></elements></root>")
  end
end

如您所见，我们使用了所有 java 对象，但 Perm 仍然会发生内存泄漏问题

如果我们在 Spring 应用程序中创建对象并将 Application Context 传递给 ruby​​ 以便将来获取 bean，这并不能解决此问题

在脚本容器中设置 ApplicationContext context = Spring application context

container.put("$context", context);

红宝石代码

bean = $context.getBean("some_name")
bean.myMethod()

【参考方案1】：

解决方案是使用从当前 JVM 启动的单独 JVM：

Start new JVM