[Paraview-developers] [EXTERNAL] ParaView Windows Socket Issue

[Scott, W Alan]

Windows, correct?  Visual compiler?  Where are you running the server?



From: Utkarsh Ayachit [mailto:utkarsh.ayachit at kitware.com]
Sent: Monday, May 12, 2014 5:54 PM
To: Scott, W Alan
Cc: ParaView Developers
Subject: Re: [EXTERNAL] [Paraview-developers] ParaView Windows Socket Issue

It is true that it seems like it;s failing only on this machine. If you want to test it, just check out git/next and build it as Release or RelWithDebInfo and then run the following test:

ctest -R pvcs.RenderNan

It hangs randomly for me.

Thanks
Utkarsh

On Mon, May 12, 2014 at 5:31 PM, Scott, W Alan <wascott at sandia.gov<mailto:wascott at sandia.gov>> wrote:
Timing?  Could you have hardware that is becoming flaky?  Try on another box?

If you want to send me bits, I could give it a try?

Alan

From: Paraview-developers [mailto:paraview-developers-bounces at paraview.org<mailto:paraview-developers-bounces at paraview.org>] On Behalf Of Utkarsh Ayachit
Sent: Monday, May 12, 2014 3:11 PM
To: ParaView Developers
Subject: [EXTERNAL] [Paraview-developers] ParaView Windows Socket Issue

I am running into a strange issue with sockets on Windows. Here are the symptoms:

+ VS9 (VS2008), 64 bit, Windows 7
+ Fails only with Release or RelWithDebInfo builds (never in Debug)
+ client-server tests fail when receiving large chunks of data (although sometimes it happens for small chunks too)
+ "recv" call fails with error WSAEFAULT (most of the time). I am assured that the corresponding "send" does indeed happen. In other words, not a race condition or some other deadlock.
+ I can overcome the problem by simply doing a memset(buffer, 0, lengthofbuffer) before the "recv" call.

I already tried chunking the recv is 8KB chunks, doesn't help. Has anyone ever seen something like this, or has any ideas that could work?

Thanks
Utkarsh

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