GoBench stuck

[asafm]

./gobench5 -c=25000 -d="postbig.txt" -k=true -r=1 -u="http://myurl" -tc=10000 -tw=10000 -tr=10000 -ta=300000

postbig = ~0.5mb
Running this is parallel from two computers, resulted in one client terminated after 226 seconds, while the other is stuck. There are ~25k connection on the server side.