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I am measuring the UDP throughput between two Docker containers that are connected by Docker's native overlay network. I already used iperf but also want to measure the throughput with nuttcp. But when I am starting the server instance and then start the client instance, the server instance crashes with the following error message: Segmentation fault (core dumped). This is how I started the server:

nuttcp -S -u --nofork

and this is how I started the client:

nuttcp -u -T 115 10.0.0.3

The server instance crashes directly after starting up the client. I used the same commands to run nuttcp outside of Docker without any problems.

Here is some additional informations about the versions I am using:

# inside the container:
$ uname -a
Linux 310d92462ac0 3.19.0-58-generic #64~14.04.1-Ubuntu SMP Fri Mar 18 19:05:43 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux
$ nuttcp -V
nuttcp-6.1.2

# outside the container:
$ uname -a
Linux libAMS 3.19.0-58-generic #64~14.04.1-Ubuntu SMP Fri Mar 18 19:05:43 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux
$ docker -v
Docker version 1.10.3, build 20f81dd

Does anyone have an idea how to solve this?

arne.z
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1 Answers1

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The bug is in the Version: 6.1.2 of nuttcp For more information and fix read this link https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=745051

My suggestion is to use a new version. 

mkdir nuttcp
cd nuttcp/
wget http://nuttcp.net/nuttcp/beta/nuttcp-7.3.3.c

If you don’t have gcc

sudo apt-get install build-essential manpages-dev

compile program and run

cc nuttcp-7.3.3.c -o nuttcp-7
./nuttcp-7 –V
nuttcp-7.3.3
stambata
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  • Thank you for your answer! I just solved the problem by downloading the [binary](http://nuttcp.net/nuttcp/nuttcp-7.3.3/nuttcp-7.3.3.x86_64) of the 7.3.3 version directly. So I didn't have to compile anything. – arne.z Apr 17 '16 at 21:19