htmlunit out of memoery error:java heap space
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内容图文
程序 WebClient webClient = new WebClient(BrowserVersion.CHROME);
webClient.getOptions().setJavaScriptEnabled(false);
webClient.getOptions().setCssEnabled(false);
HtmlPage page;
try {
page = webClient.getPage("http://www.taolife.com.cn/");
System.out.print(page.asText());
} catch (FailingHttpStatusCodeException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (MalformedURLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
bug：
1Exception in thread "main" java.lang.OutOfMemoryError: Java heap space at java.lang.Class.getDeclaredFields0(Native Method) at java.lang.Class.privateGetDeclaredFields(Class.java:2583) at java.lang.Class.getField0(Class.java:2975) at java.lang.Class.getField(Class.java:1701) at com.gargoylesoftware.htmlunit.javascript.JavaScriptEngine.configureConstants(JavaScriptEngine.java:612) at com.gargoylesoftware.htmlunit.javascript.JavaScriptEngine.init(JavaScriptEngine.java:271) at com.gargoylesoftware.htmlunit.javascript.JavaScriptEngine.access$000(JavaScriptEngine.java:105) at com.gargoylesoftware.htmlunit.javascript.JavaScriptEngine$1.run(JavaScriptEngine.java:173) at net.sourceforge.htmlunit.corejs.javascript.Context.call(Context.java:628) at net.sourceforge.htmlunit.corejs.javascript.ContextFactory.call(ContextFactory.java:513) at com.gargoylesoftware.htmlunit.javascript.JavaScriptEngine.initialize(JavaScriptEngine.java:184) at com.gargoylesoftware.htmlunit.WebClient.initialize(WebClient.java:1008) at com.gargoylesoftware.htmlunit.WebWindowImpl.setEnclosedPage(WebWindowImpl.java:135) at com.gargoylesoftware.htmlunit.html.FrameWindow.setEnclosedPage(FrameWindow.java:105) at com.gargoylesoftware.htmlunit.html.HTMLParser.parse(HTMLParser.java:221) at com.gargoylesoftware.htmlunit.html.HTMLParser.parseHtml(HTMLParser.java:199) at com.gargoylesoftware.htmlunit.DefaultPageCreator.createHtmlPage(DefaultPageCreator.java:272) at com.gargoylesoftware.htmlunit.DefaultPageCreator.createPage(DefaultPageCreator.java:160) at com.gargoylesoftware.htmlunit.WebClient.loadWebResponseInto(WebClient.java:476) at com.gargoylesoftware.htmlunit.WebClient.getPage(WebClient.java:350) at com.gargoylesoftware.htmlunit.html.BaseFrameElement.loadInnerPageIfPossible(BaseFrameElement.java:184) at com.gargoylesoftware.htmlunit.html.BaseFrameElement.loadInnerPage(BaseFrameElement.java:122) at com.gargoylesoftware.htmlunit.html.HtmlPage.loadFrames(HtmlPage.java:1945) at com.gargoylesoftware.htmlunit.html.HtmlPage.initialize(HtmlPage.java:227) at com.gargoylesoftware.htmlunit.WebClient.loadWebResponseInto(WebClient.java:483) at com.gargoylesoftware.htmlunit.WebClient.getPage(WebClient.java:350) at com.gargoylesoftware.htmlunit.html.BaseFrameElement.loadInnerPageIfPossible(BaseFrameElement.java:184) at com.gargoylesoftware.htmlunit.html.BaseFrameElement.loadInnerPage(BaseFrameElement.java:122) at com.gargoylesoftware.htmlunit.html.HtmlPage.loadFrames(HtmlPage.java:1945) at com.gargoylesoftware.htmlunit.html.HtmlPage.initialize(HtmlPage.java:227) at com.gargoylesoftware.htmlunit.WebClient.loadWebResponseInto(WebClient.java:483) at com.gargoylesoftware.htmlunit.WebClient.getPage(WebClient.java:350)
修改运行参数：-Xms1024m -Xmx1024m，依旧报错。
修改
webClient.getOptions().setJavaScriptEnabled(false);
程序正常运行；
分析：
估计htmunit采用的javascript解析器存在问题，陷入死循环耗尽内存；
因项目时间问题，暂时采集true方案，回头用内存监控工具 jconsole或者eclipse memoery analyzer找出是哪个模块出问题。
原文：http://my.oschina.net/u/856051/blog/502775
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