Questions about JSP programming 2007-01-15 - By Zack Grafton
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Xuekun Hu wrote:
> Zack, thanks for replying.
>
>> Xuekun,
>>
>> The reason why you are probably getting a file size thats one byte
>> larger than expected is that the JSP processor doesn't remove any
>> whitespace after it includes the other pages content. For example, <%@
>> include page="request.getParameter("f") %> is going to be executed and
>> the input from the other file is going to be started on the next line.
>> This means there is probably and extra newline character at the
>> beginning of the file. There is a way to strip the whitespace with a
>> tomcat configuration directive. I'll look this up for you soon.
>
> Do you mean the "trimSpaces" directive? Yes, it works. :-)
>
>> The second error I would need more details on, is it inserting anything
>> into any of the logs during the times when its not working? My guess
>> would almost be that the machine is running out of memory because it is
>> storing the contents of the file in memory. That's just a guess though.
>
> At first, TOMCAT will not report anything out, however testing with a
> long time, TOMCAT finally report out error
> "java.lang.OutOfMemoryError  : Java heap space", then TOMCAT die.
>
> Thx, Xuekun
>
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>
Xuekun,
Glad I was able to help in some little way. I thought I was on the
right track with the memory issue. I'm not exactly sure what is going
on with <%@ include file="request.getParameter("f") %> but I have a
feeling its the way the include directive reads in the file. I hope you
find a way around the memory issue, but you could always try forcing the
garbage collector to run after the page is displayed.
Zack
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