I have a VM running CentOS 6. On this Linux box, I run 4 curl download concurrently.
In some case, one of the curl download hangs.
ps shows that curl process is still there. And
netstat shows the connection's RECV_Q is very long:
tcp 878104 0 10.161.238.20:46130 10.162.220.12:80 ESTABLISHED
curl version 7.38.0.
Any idea? Why
curl hangs? If increasing TCP buffer would help?