脚本宝典收集整理的这篇文章主要介绍了一个奇怪的问题：tomcat 栈溢出 StackOverflowError错误，脚本宝典觉得挺不错的，现在分享给大家，也给大家做个参考。
一个栈溢出错误：
ava.lang.StackOverflowError at org.apache.catalina.core.ApplicationHttPRequest$AttributenamesEnumerator.findNext(ApplicationHttpRequest.java:996) at org.apache.catalina.core.ApplicationHttpRequest$AttributeNamesEnumerator.findNext(ApplicationHttpRequest.java:996) at org.apache.catalina.core.ApplicationHttpRequest$AttributeNamesEnumerator.hasMoreElements(ApplicationHttpRequest.java:971) at >>>>>>>>>>>>>>>>>>> 中间省略几百行同样的内容 <<<<<<<<<<<<<<<<<<<<<<< org.apache.catalina.core.ApplicationHttpRequest$AttributeNamesEnumerator.findNext(ApplicationHttpRequest.java:996) at org.apache.catalina.core.ApplicationHttpRequest$AttributeNamesEnumerator.hasMoreElements(ApplicationHttpRequest.java:971) at org.apache.catalina.core.ApplicationHttpRequest$AttributeNamesEnumerator.findNext(ApplicationHttpRequest.java:996) at org.apache.catalina.core.ApplicationHttpRequest$AttributeNamesEnumerator.hasMoreElements(ApplicationHttpRequest.java:971) at org.apache.catalina.core.ApplicationHttpRequest$AttributeNamesEnumerator.findNext(ApplicationHttpRequest.java:996) at org.apache.catalina.core.ApplicationHttpRequest$AttributeNamesEnumerator.hasMoreElements(ApplicationHttpRequest.java:971) at org.apache.catalina.core.ApplicationHttpRequest$AttributeNamesEnumerator.findNext(ApplicationHttpRequest.java:996) at org.apache.catalina.core.ApplicationHttpRequest$AttributeNamesEnumerator.hasMoreElements(ApplicationHttpRequest.java:971) at org.apache.catalina.core.ApplicationHttpRequest$AttributeNamesEnumerator.findNext(ApplicationHttpRequest.java:996) at org.apache.catalina.core.ApplicationHttpRequest$AttributeNamesEnumerator.hasMoreElements(ApplicationHttpRequest.java:971) at org.apache.catalina.core.ApplicationHttpRequest$AttributeNamesEnumerator.findNext(ApplicationHttpRequest.java:996) at org.apache.catalina.core.ApplicationHttpRequest$AttributeNamesEnumerator.hasMoreElements(ApplicationHttpRequest.java:971) at org.apache.catalina.core.ApplicationHttpRequest$AttributeNamesEnumerator.findNext(ApplicationHttpRequest.java:996) at org.apache.catalina.core.ApplicationHttpRequest$AttributeNamesEnumerator.hasMoreElements(ApplicationHttpRequest.java:971) at org.apache.catalina.core.ApplicationHttpRequest$AttributeNamesEnumerator.findNext(ApplicationHttpRequest.java:996) at org.apache.catalina.core.ApplicationHttpRequest$AttributeNamesEnumerator.hasMoreElements(ApplicationHttpRequest.java:971) at org.apache.catalina.core.ApplicationHttpRequest$AttributeNamesEnumerator.findNext(ApplicationHttpRequest.java:996) at org.apache.catalina.core.ApplicationHttpRequest$AttributeNamesEnumerator.hasMoreElements(ApplicationHttpRequest.java:971) at org.apache.catalina.core.ApplicationHttpRequest$AttributeNamesEnumerator.findNext(ApplicationHttpRequest.java:996) at org.apache.catalina.core.ApplicationHttpRequest$AttributeNamesEnumerator.hasMoreElements(ApplicationHttpRequest.java:971) at org.apache.catalina.core.ApplicationHttpRequest$AttributeNamesEnumerator.findNext(ApplicationHttpRequest.java:996) at org.apache.catalina.core.ApplicationHttpRequest$AttributeNamesEnumerator.hasMoreElements(ApplicationHttpRequest.java:971) at org.apache.catalina.core.ApplicationHttpRequest$AttributeNamesEnumerator.findNext(ApplicationHttpRequest.java:996) at org.apache.catalina.core.ApplicationHttpRequest$AttributeNamesEnumerator.hasMoreElements(ApplicationHttpRequest.java:971) at org.apache.catalina.core.ApplicationHttpRequest$AttributeNamesEnumerator.findNext(ApplicationHttpRequest.java:996) at org.apache.catalina.core.ApplicationHttpRequest$AttributeNamesEnumerator.hasMoreElements(ApplicationHttpRequest.java:971) at org.apache.catalina.core.ApplicationHttpRequest$AttributeNamesEnumerator.findNext(ApplicationHttpRequest.java:996) at org.apache.catalina.core.ApplicationHttpRequest$AttributeNamesEnumerator.hasMoreElements(ApplicationHttpRequest.java:971) at org.apache.catalina.core.ApplicationHttpRequest$AttributeNamesEnumerator.findNext(ApplicationHttpRequest.java:996) at org.apache.catalina.core.ApplicationHttpRequest$AttributeNamesEnumerator.hasMoreElements(ApplicationHttpRequest.java:971) at org.apache.catalina.core.ApplicationHttpRequest$AttributeNamesEnumerator.findNext(ApplicationHttpRequest.java:996) at org.apache.catalina.core.ApplicationHttpRequest$AttributeNamesEnumerator.hasMoreElements(ApplicationHttpRequest.java:971) at org.apache.catalina.core.ApplicationHttpRequest$AttributeNamesEnumerator.findNext(ApplicationHttpRequest.java:996) at org.apache.catalina.core.ApplicationHttpRequest$AttributeNamesEnumerator.hasMoreElements(ApplicationHttpRequest.java:971) at org.apache.catalina.core.ApplicationHttpRequest$AttributeNamesEnumerator.findNext(ApplicationHttpRequest.java:996) at org.apache.catalina.core.ApplicationHttpRequest$AttributeNamesEnumerator.hasMoreElements(ApplicationHttpRequest.java:971) at org.springframework.web.servlet.DispatcherServlet.DOService(DispatcherServlet.java:873) at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:967) at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:869) at javax.servlet.http.HttpServlet.service(HttpServlet.java:661) at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:843) at javax.servlet.http.HttpServlet.service(HttpServlet.java:742) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) at org.apache.LOGging.log4j.web.Log4jServletFilter.doFilter(Log4jServletFilter.java:64) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:728)tomcat版本是8.5.38版本，spring是4.2.6.RELEASE，出错的代码也找到了：
DispatcherServlet：
protected void doService(HttpServletRequest request, HttpServletResponse response) throws Exception { if (logger.isDebugEnabled()) { String resumed = WebAsyncUtils.getAsyncManager(request).hasConcurrentResult() ? " resumed" : ""; logger.debug("DispatcherServlet with name '" + getServletName() + "'" + resumed + " processing " + request.getMethod() + " request for [" + getRequestUri(request) + "]"); } // Keep a snapshot of the request attributes in case of an include, // to be able to restore the original attributes after the include. Map<String, Object> attributesSnapshot = null; if (WebUtils.isIncludeRequest(request)) { attributesSnapshot = new HashMap<String, Object>(); Enumeration<?> attrNames = request.getAttributeNames(); while (attrNames.hasMoreElements()) { //这个地方死循环了 String attrName = (String) attrNames.nextElement(); if (this.cleanupAfterInclude || attrName.startsWith("org.springframework.web.servlet")) { attributesSnapshot.put(attrName, request.getAttribute(attrName)); } } } ..... } ApplicationHttpRequest中的内部类AttributeNamesEnumerator：
@override public boolean hasMoreElements() { return ((pos != last) || (next != null) || ((next = findNext()) != null)); } protected String findNext() { String result = null; while ((result == null) && (parentEnumeration.hasMoreElements())) { String current = parentEnumeration.nextElement(); if (!isSpecial(current)) { result = current; } } return result; }从错误日志上来看，先调用hasMoreElements，再调用findNext， 以此为循环，直到栈溢出。
不知道怎么回事，只找到一篇tomcat的issue，有知道的指点一些。
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