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February 2009 - Posts

setting managed breakpoints in windbg

Windbg is a native debugger and you can use it to set a breakpoint on a virtual address. Any managed code running within the process wouldn’t have a virtual address associated with it until it is JIT compiled. Thus setting a breakpoint on a managed function Read More...
Posted Friday, February 27, 2009 12:28 AM by Sudeep Gopalakrishnan | 0 Comments
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catching a memory dump on system.outofmemoryexception

Issues related to high memory utilization on an IIS application server are common. With .NET there is a little misconception that the Garbage Collector (GC) will clean up objects and therefore the process can never run out of memory. This isn’t true. Read More...
Posted Thursday, February 26, 2009 11:28 AM by Sudeep Gopalakrishnan | 0 Comments
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CAPTURING AND ANALYZING AN ETW TRACE (event TRACING FOR WINDOWS)

Continuing my conversations on using tools, today I want to explain how to capture an ETW trace and parse it. Event tracing for Windows (ETW) is a very powerful, tracing mechanism built into the Windows operating system that allows you to view messages Read More...
Posted Wednesday, February 25, 2009 10:12 PM by Sudeep Gopalakrishnan | 7 Comments
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IIS Compression failure - compression_disabled Status

Recently, we ran into a problem where static or dynamic compression would not work on a few websites, specially SharePoint sites, but works on other sites. I always use our software tools and take a data driven approach for troubleshooting any kind of Read More...
Posted Monday, February 23, 2009 11:03 PM by Sudeep Gopalakrishnan | 0 Comments
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Creating a custom accelerator for internet explorer 8

Internet Explorer 8 is expected to be available in the near future. It packs a whole lot of features . I downloaded the latest RC1 build from the Microsoft site and did some testing. This version packs in a whole lot of browser extensibility features Read More...
Posted Sunday, February 22, 2009 8:53 PM by Sudeep Gopalakrishnan | 2 Comments
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debugging memory problems – a beginner’s view

Unlike native debugging, you don’t need symbols for debugging managed code. SOS.dll can also be used with WinDBG and Visual Studio debugger. Simply use the intermediate window in Visual Studio to load SOS.dll and then you can use the commands provided Read More...
Posted Sunday, February 22, 2009 1:55 AM by Sudeep Gopalakrishnan | 0 Comments
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Debugging sSL handshake failure using network monitor – a scenario

In one of my earlier post I explained how to use Microsoft Network Monitor to debug a networking problem. Network trace tools aren’t very useful in debugging problems when the channel is secured (HTTPS) and you need to view the data to make your conclusions. Read More...
Posted Monday, February 16, 2009 1:30 AM by Sudeep Gopalakrishnan | 3 Comments
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Windows 2008 AND IISRESET.EXE

IISreset.exe is a magical command that resolves many problems! Err… well, yeah that command restarts all IIS related processes and thus essentially running it cleans up all the “mess”. So is there anything special about IISReset.exe in Windows 2008? Yes Read More...
Posted Saturday, February 14, 2009 10:30 PM by Sudeep Gopalakrishnan | 0 Comments
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Using Microsoft network monitor to track down networking problems

There are a lot of software tools provided by Microsoft and written by other companies that really make the job of a support engineer easy. Without software tools, it is extremely difficult to track down software problems. Mark Russinovich is famous for Read More...
Posted Tuesday, February 10, 2009 3:48 AM by Sudeep Gopalakrishnan | 0 Comments
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Capturing simultaneous network traces from client & server machine

In this blog post, I want to provide you with instructions on capturing simultaneous network traffic captures from a client system and from the web server. The captures will assist you in debugging networking related problems. Download Microsoft Network Read More...
Posted Tuesday, February 10, 2009 1:37 AM by Sudeep Gopalakrishnan | 0 Comments
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installing & configuring debugging tools for windows

There are umpteen blogs out there that discuss various debugging techniques. So what is so different about this one? Nothing really. It’s just something that I am adding as a reference for myself and for any soul out there that is starting out with debugging. Read More...
Posted Monday, February 09, 2009 2:32 AM by Sudeep Gopalakrishnan | 0 Comments
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IIS 7.0 - HTTP 502.2 - Bad Gateway

Recently I got a couple of support cases where customers who migrated their CGI applications over to IIS 7.0 on Windows Server 2008 ran into the following error: ERROR: HTTP Error 502.2 - Bad Gateway The specified CGI application misbehaved by not returning Read More...
Posted Sunday, February 08, 2009 3:31 AM by Sudeep Gopalakrishnan | 0 Comments
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Attachment(s): SampleCode.txt

IIS 7 and Kernel mode authentication

IIS 7.0 available with Windows Server 2008 is the new Application server platform from Microsoft. Just like its predecessor, it introduces various enhancements. One of the enhancements available is that authentication is now performed in kernel mode by Read More...
Posted Sunday, February 08, 2009 2:38 AM by Sudeep Gopalakrishnan | 2 Comments
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Events using delegates (c#) – An additional example

A former colleague wrote an excellent blog post about using Events with Delegates, in C#. He is one of the smartest people I know and very active in the community, with a deep understanding of a dozen technologies with never ending passion for technology. Read More...
Posted Saturday, February 07, 2009 10:26 PM by Sudeep Gopalakrishnan | 0 Comments
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