Running UDP test appears to hang

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What steps will reproduce the problem?
1. On Server A  /opt/iperf3 --client 10.10.205.13 --port 55525   --udp --debug
2. On Server B /opt/iperf3 --format k --port 55525 --udp --server -V
3.

What is the expected output? What do you see instead?
ON A:
Connecting to host 10.10.205.13, port 55525

ON B:
Accepted connection from 10.10.24.14, port 37180
      Cookie: e47a1dcd-70b4-44b5-9411-e59ade43f579

What version of the product are you using? On what operating system?
[root@horoscope opt]# /opt/iperf3 -v
iperf version 3.0-BETA4 (2 Aug 2010) 


Please provide any additional information below.
When I remove --udp it works just fine.

Original issue reported on code.google.com by kennethw...@gmail.com on 11 Aug 2010 at 9:42

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What OS did you run this test on?

Original comment by jdugan.e...@gmail.com on 12 Aug 2010 at 4:21

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Linux xxx.xxx.xxx.com 2.6.18-194.3.1.el5PAE #1 SMP Sun May 2 04:42:25 EDT 2010 
i686 i686 i386 GNU/Linux

[root@xxxx ~]# cat /etc/redhat-release 
Red Hat Enterprise Linux Server release 5.5 (Tikanga)

Original comment by kennethw...@gmail.com on 12 Aug 2010 at 5:55

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[deleted comment]

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UDP does not seem to work (TCP works just fine) for the following:

- Ubuntu 9.04 (jaunty):  Linux xxx 2.6.18.8-linode22 #1 SMP Tue Nov 10 16:12:12 
UTC 2009 i686 GNU/Linux
- cygwin : CYGWIN_NT-5.1 xxx 1.7.7(0.230/5/3) 2010-08-31 09:58 i686 Cygwin

This is for iperf version 3.0-BETA4 (2 Aug 2010) .


Following is the command output(s):

-------------- server ------------
     $ ./iperf3 -s -p 1111        
     -----------------------------------------------------------
     Server listening on 1111
     -----------------------------------------------------------
     Accepted connection from 127.0.0.1, port 42747
     The client has unexpectedly closed the connection.
     -----------------------------------------------------------
     Server listening on 1111
     -----------------------------------------------------------

-------------- client ------------
     $ ./iperf3 -c 127.0.0.1 -p 1111 -u        
     Connecting to host 127.0.0.1, port 1111
     error: Unable to read from stream socket: Connection refused

----------------------------------

Original comment by ddus...@gmail.com on 30 Sep 2010 at 7:53

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Original comment by bltier...@es.net on 12 Mar 2013 at 10:29

• Changed state: Fixed