的StackOverflowError在String.toLowerCase

Question

它看起來像一個過長的字符串造成如下因素的異常：

Caused by: java.lang.StackOverflowError 
    at java.lang.String.toLowerCase(String.java:2496) 
    at com.gargoylesoftware.htmlunit.html.NamedAttrNodeMapImpl.fixName(DomElement.java:489) 
    at com.gargoylesoftware.htmlunit.html.NamedAttrNodeMapImpl.get(DomElement.java:602) 
    at com.gargoylesoftware.htmlunit.html.DomElement.getAttribute(DomElement.java:215) 
    at com.gargoylesoftware.htmlunit.javascript.host.css.CSSStyleDeclaration.getStyleMap(CSSStyleDeclaration.java:634) 
    at com.gargoylesoftware.htmlunit.javascript.host.css.ComputedCSSStyleDeclaration.getStyleMap(ComputedCSSStyleDeclaration.java:243) 
    at com.gargoylesoftware.htmlunit.javascript.host.css.CSSStyleDeclaration.getStyleAttribute(CSSStyleDeclaration.java:472) 
    at com.gargoylesoftware.htmlunit.javascript.host.css.ComputedCSSStyleDeclaration.getStyleAttribute(ComputedCSSStyleDeclaration.java:162) 
    at com.gargoylesoftware.htmlunit.javascript.host.css.CSSStyleDeclaration.jsxGet_position(CSSStyleDeclaration.java:4008) 
    at com.gargoylesoftware.htmlunit.javascript.host.css.ComputedCSSStyleDeclaration.jsxGet_position(ComputedCSSStyleDeclaration.java:1304) 
    at com.gargoylesoftware.htmlunit.javascript.host.css.ComputedCSSStyleDeclaration.getPositionWithInheritance(ComputedCSSStyleDeclaration.java:1883) 
    at com.gargoylesoftware.htmlunit.javascript.host.css.ComputedCSSStyleDeclaration.getTop(ComputedCSSStyleDeclaration.java:1737) 
    at com.gargoylesoftware.htmlunit.javascript.host.css.ComputedCSSStyleDeclaration.getTop(ComputedCSSStyleDeclaration.java:1769) 
    at com.gargoylesoftware.htmlunit.javascript.host.css.ComputedCSSStyleDeclaration.getTop(ComputedCSSStyleDeclaration.java:1769) 
    at com.gargoylesoftware.htmlunit.javascript.host.css.ComputedCSSStyleDeclaration.getTop(ComputedCSSStyleDeclaration.java:1769) 
    at com.gargoylesoftware.htmlunit.javascript.host.css.ComputedCSSStyleDeclaration.getTop(ComputedCSSStyleDeclaration.java:1769) 
    at com.gargoylesoftware.htmlunit.javascript.host.css.ComputedCSSStyleDeclaration.getTop(ComputedCSSStyleDeclaration.java:1769) 

我猜​​循環導致此問題。

什麼是字符串的物理限制？ 我可以限制​​的環路檢測器嗎？

Answer 1

是否已有一個bug這個開放？ http://sourceforge.net/p/htmlunit/bugs/1233/

Answer 2

原因是代碼中存在遞歸調用。請檢查。

在JVM的瞭解更深層次來解釋這個問題：Java虛擬機規範已經排除例外的兩種情況對於Java堆棧：

1. Java堆棧允許全自動擴大，當它不能申請足夠的內存時它會拋出 OOM(OutOfMemory)錯誤。
   
2. Java堆棧與堆棧幀構成，並且每一個Java 方法推框架，它會拋出StackOverflowError噹噹前線程的堆棧 深度比JVM的允許大。

也許幫助你:)