碰到这样一个问题，访问普通的jsp程序，居然导致Java服务器 Crash 死掉：

#

# An unexpected error has been detected by HotSpot Virtual Machine:

#

#  EXCEPTION_PRIV_INSTRUCTION (0xc0000096) at pc=0x00b024b1, pid=692, tid=5476

#

# Java VM: Java HotSpot(TM) Client VM (1.5.0_04-b05 mixed mode)

# Problematic frame:

# j  jsp_servlet._web_45_inf._pages._be._change.__be_modify_info_start._jspService (Ljavax/servlet/http/HttpServletRequest;Ljavax/servlet/http/HttpServletResponse;)V+1026

#

---------------  T H R E A D  ---------------

Current thread (0x54892008):  JavaThread "[ACTIVE] ExecuteThread: '2' for queue: 'weblogic.kernel.Default (self-tuning)'" daemon [_thread_in_Java, id=5476]

siginfo: ExceptionCode=0xc0000096

Registers:

EAX=0xffffffff, EBX=0x00000071, ECX=0x00038490, EDX=0x00000000

ESP=0x558be594, EBP=0x558be5e4, ESI=0x4cd46ad6, EDI=0x558beb44

EIP=0x00b024b1, EFLAGS=0x00010216

Top of Stack: (sp=0x558be594)

0x558be594:   558beb44 4cd46ad6 558be5e4 558be5b4

0x558be5a4:   00000071 00000279 4cd58fa8 00000000

0x558be5b4:   00b024ab 6d7f5358 08a20c58 08a20c58

0x558be5c4:   03dacf30 558be5c8 4cd46852 558beb44

0x558be5d4:   4cd6e328 00000000 4cd58fa8 558beb3c

0x558be5e4:   558beb64 00b02923 00000000 00000000

0x558be5f4:   00000000 00000000 00000000 00000000

0x558be604:   00000000 00000000 00000000 00000000 

Instructions: (pc=0x00b024b1)

0x00b024a1:   68 58 53 7f 6d e8 00 00 00 00 60 e8 15 7b bb 6c

0x00b024b1:   f4 90 90 00 00 00 00 00 00 00 00 00 00 00 00 80 

Stack: [0x55880000,0x558c0000),  sp=0x558be594,  free space=249k

Native frames: (J=compiled Java code, j=interpreted, Vv=VM code, C=native code)

j  jsp_servlet._web_45_inf._pages._be._change.__be_modify_info_start._jspService (Ljavax/servlet/http/HttpServletRequest;Ljavax/servlet/http/HttpServletResponse;)V+1026

j  weblogic.servlet.jsp.JspBase.service(Ljavax/servlet/ServletRequest;Ljavax/servlet/ServletResponse;)V+9

j  weblogic.servlet.internal.StubSecurityHelper$ServletServiceAction.run()Ljava/lang/Object;+43

原来是该jsp文件太大，因为编译后的_jspService 方法 jsp_servlet._web_45_inf._pages._be._change.__be_modify_info_start._jspService 超过了Java语言规定的方法最大64k 大小。

you can extract those tables into another JSP and be included via <jsp:include />. This will cut away the binary size of that table within the service method. Do not use <% @ include %>, which still compiled the jsps into service method.

comment away 

<jsp-param>
<param-name>jspServlet</param-name>
<param-value>weblogic.servlet.WlwJSPServlet</param-value>
</jsp-param>

in weblogic.xml

to use back default jspc jsp compiler. Default jspc jsp compiler is more tolerance to errors and you can even use "keepgenerated" <param> tag to generate java source, which is very useful to re-factor out tables.

Strive to put code/logics into java method or <%! %> region, this cut down the size of service() method.

http://futuretask.blogspot.com/2005/01/java-tip-5-avoid-64kb-method-limit-on.html

http://java.sun.com/docs/books/jvms/second_edition/html/ClassFile.doc.html#88659

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IT瘾于2012年7月17日 下午03时40分10秒发布 #