Solved

InternetReadFile 100% cpu usage

Posted on 2007-03-28
6
514 Views
Last Modified: 2010-05-18
Hi,

im using InternetReadFile win api function on this url : http://fotball.aftenposten.no/tv/article77811.ece
from some reason the last chunk im trying to read is stuck and cause 100% cpu utilization and doesn't seems to end, i did some google, and found out this kb from Microsoft: http://support.microsoft.com/kb/263754
 i tried what was recommended there and it didn't work, does anyone has new idea about it ?

Thanks,
Amit



0
Comment
Question by:Relegence
  • 2
  • 2
  • 2
6 Comments
 
LVL 11

Expert Comment

by:DeepuAbrahamK
ID: 18807144
It's c learly written, 'The problem is caused by a bug in the InternetReadFile API. Under some conditions, InternetReadFile fails to detect a connection closure and still tries to read data from the socket. '

RESOLUTION
----------------
Because this problem only occurs when chunked encoding is used, you can disable chunked encoding to solve the problem. Because chunked encoding is not used with HTTP 1.0, you can work around this problem by using HTTP
1.0
To do so you must:
1. Specify HTTP/1.0 in the HttpOpenRequest API.
2. In Internet Explorer, from the Tools menu, click Internet Options, and then select the Advanced tab. Clear the Use HTTP 1.1 and Use HTTP 1.1 through proxy connections check boxes.

Did you try this?
Best Regards,
DeepuAbrahamK
0
 

Author Comment

by:Relegence
ID: 18807165
of course i tried that,  :-)
0
 
LVL 11

Expert Comment

by:DeepuAbrahamK
ID: 18807167
Read this also, if you are not able to specify the http version by using HttpOpenRequest().
http://support.microsoft.com/kb/258425/EN-US/
Best Regards,
DeepuAbrahamK
0
Is Your Active Directory as Secure as You Think?

More than 75% of all records are compromised because of the loss or theft of a privileged credential. Experts have been exploring Active Directory infrastructure to identify key threats and establish best practices for keeping data safe. Attend this month’s webinar to learn more.

 
LVL 39

Accepted Solution

by:
itsmeandnobodyelse earned 500 total points
ID: 18807180
I would assume it's another bug if the above doesn't help (you restarted the machine after changing to HTTP 1.1 Proxy?). Maybe a newer IE would solve the issue.

As a last resort you may put the call in a separate thread and set it to low priority. Then establish a watchdog which checks CPU and kills the thread if it runs into the infinite loop.

Regards, Alex
0
 

Author Comment

by:Relegence
ID: 18807619
Guys, thanks you all for your quick responses,
i already tried  the "watchdog" option itsmeandnobodyelse suggested , this approach imposes another problem because there is not safe way to kill threads without causing memory leaks, i think the solution is here : http://www.codeproject.com/internet/asyncwininet.asp?df=100&forumid=1409&exp=0&select=975072

Amit

0
 
LVL 39

Expert Comment

by:itsmeandnobodyelse
ID: 18808720
Amit, you shouldn't give C grade without further feedback. If you found the solution yourself you could tell the moderator and get points back. Or if you think that one or more comments have helped give a B grade which was appropriate. A C grade is appropriate if you asked for more help but didn't get it. Or if it was a really poor help such as "Help yourself and look at your sources".

I personally prefer to get no points rather than a C grade.

Regards, Alex
0

Featured Post

Is Your Active Directory as Secure as You Think?

More than 75% of all records are compromised because of the loss or theft of a privileged credential. Experts have been exploring Active Directory infrastructure to identify key threats and establish best practices for keeping data safe. Attend this month’s webinar to learn more.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

  Included as part of the C++ Standard Template Library (STL) is a collection of generic containers. Each of these containers serves a different purpose and has different pros and cons. It is often difficult to decide which container to use and …
Introduction This article is a continuation of the C/C++ Visual Studio Express debugger series. Part 1 provided a quick start guide in using the debugger. Part 2 focused on additional topics in breakpoints. As your assignments become a little more …
The viewer will learn how to pass data into a function in C++. This is one step further in using functions. Instead of only printing text onto the console, the function will be able to perform calculations with argumentents given by the user.
The viewer will be introduced to the member functions push_back and pop_back of the vector class. The video will teach the difference between the two as well as how to use each one along with its functionality.

910 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

16 Experts available now in Live!

Get 1:1 Help Now