The JSP specification requires that an attribute name is preceded by whitespace

---

type Exception report

message /pages/header.jsp (line: 53, column: 108) The JSP specification requires that an attribute name is preceded by whitespace

description The server encountered an internal error that prevented it from fulfilling this request.

exception

org.apache.jasper.JasperException: /pages/header.jsp (line: 53, column: 108) The JSP specification requires that an attribute name is preceded by whitespace
	org.apache.jasper.compiler.DefaultErrorHandler.jspError(DefaultErrorHandler.java:42)
	org.apache.jasper.compiler.ErrorDispatcher.dispatch(ErrorDispatcher.java:443)
	org.apache.jasper.compiler.ErrorDispatcher.jspError(ErrorDispatcher.java:89)
	org.apache.jasper.compiler.Parser.parseAttributes(Parser.java:164)
	org.apache.jasper.compiler.Parser.parseAttributes(Parser.java:153)
	org.apache.jasper.compiler.Parser.parseCustomTag(Parser.java:1236)
	org.apache.jasper.compiler.Parser.parseElements(Parser.java:1452)
	org.apache.jasper.compiler.Parser.parse(Parser.java:138)
	org.apache.jasper.compiler.ParserController.doParse(ParserController.java:242)
	org.apache.jasper.compiler.ParserController.parse(ParserController.java:102)
	org.apache.jasper.compiler.Compiler.generateJava(Compiler.java:198)
	org.apache.jasper.compiler.Compiler.compile(Compiler.java:373)
	org.apache.jasper.compiler.Compiler.compile(Compiler.java:353)
	org.apache.jasper.compiler.Compiler.compile(Compiler.java:340)
	org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:646)
	org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:357)
	org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:390)
	org.apache.jasper.servlet.JspServlet.service(JspServlet.java:334)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
	org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter.doFilter(StrutsPrepareAndExecuteFilter.java:96)

 

note The full stack trace of the root cause is available in the Apache Tomcat/7.0.41 logs.

错误提示：The JSP specification requires that an attribute name is preceded by whitespace   这句话是说JSP规范要求一个属性名称前面要有空格；
于是通过提示（line: 53, column: 108）查看页面代码，

发现图中箭头处size属性前面没有空格；
如下图修改（size属性加空格）：

加了空格后异常得到解决。