Opened 9 years ago
Last modified 9 years ago
#8937 new Bugs
boost::asio::ip::tcp 5000ms stall
| Reported by: | Owned by: | chris_kohlhoff | |
|---|---|---|---|
| Milestone: | To Be Determined | Component: | asio |
| Version: | Boost 1.54.0 | Severity: | Problem |
| Keywords: | Cc: |
Description
Under certain circumstances, the boost::asio::ip::tcp module exhibits a, with a bit of patience, reproducible behavior of every now and then stalling for quite exactly 5000ms.
On May 02, 2011, a discussion about this was started by Torben Wiggerich on the Boost Mailing List: http://boost.2283326.n4.nabble.com/asio-Randomly-having-problems-reading-from-the-socket-td3490016.html
On May 09, 2011, a traffic dump was requested by Cliff Green.
I ran into the problem some time later and posted a traffic dump on Apr 02, 2012. No one has replied since.
Today, I tested whether the issue still persists with
Boost 1.49.0 Boost 1.53.0 Boost 1.54.0
and it still occurs with all of them.
For the CPU I used an Intel Core2 Duo P7350 @ 2.0 GHz, because this bug is only reproducible in a reasonable time frame (under 1 hour) on a sufficiently slow computer. Back then I used an Athlon X2 4400+. An i7 will be too fast to show this behavior reliably, or in a reasonable amount of time, or maybe even ever.
The operating system used was Windows 7 x64 SP1.
The compiler used was Visual Studio 2008 SP1 x86 + all updates from Windows Update.
I attached a Repro Case based on the code posted by Torben in the Thread. With this, on the Core2Duo I used, the behavior was repeatedly observable in under an hour of Server + Client running.
Attachments (1)
Change History (2)
by , 9 years ago
| Attachment: | Boost5000msReproCase.zip added |
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I have also seen the same problem in my own testing where there is a pause of exactly 5 seconds where no more TCP traffic is received by a tcp socket. I am not sure if the delay is on the sending or receiving side. The problem seems more likely to occur when sending larger amounts of data (~400k) in a single async_write call.
In my testing I was using Boost 1.48.0. The problem only occurs for me in Windows 7 (compiled with MSVC 2010) and not in Ubuntu 12.04 (compiled with gcc 4.6.3).