ping result not returned for some unreachable hosts

from ping3 import ping
res = ping('10.128.20.30')
print(res)

The code hang there for a very long time and never returns, even I set timeout and count to 2. But when I try shell command ping it can return results:

[root@host~]# ping -c 2 10.128.20.30
PING 10.228.94.234 (10.128.20.30) 56(84) bytes of data.

--- 10.128.20.30 ping statistics ---
2 packets transmitted, 0 received, 100% packet loss, time 40ms

[kyan001]

Hi all,

I think I just fixed this problem. This bug is not related to platform, and I finally reproduced it. This bug occurs when there are a lot of packets passed to your network interface in a short time and in the meantime the pinging destination address timeouts.

Thanks a lot for your helps. Please try the new version (>= 2.4.4) and tell me if this bug is fixed.

[dorty3541]

Hi @Rocking80

As I run some tests on my PC, I cannot reproduce that “long hang with no returns”. If you can send the test code with your OS/version info that would be helpful. Also, you can try to run the same code with ping3.DEBUG = True, to see if there any useful output exists.

Since different platforms do different implementations of networks, and I cannot cover all of them. That’s why your feedback is important to me. Thanks.

Hi,kyan001 I have the same issue,e.g:

[root@host-192-168-23-115 mysqld]# python3
Python 3.7.1 (default, Dec 20 2018, 13:50:48)
[GCC 4.8.5 20150623 (Red Hat 4.8.5-4)] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> from ping3 import ping
>>> res=ping('192.168.79.221')
^F^Z
[1]+  已停止               python3
您在 /var/spool/mail/root 中有邮件
[root@host-192-168-23-115 mysqld]# ping -c 2 192.168.79.221
PING 192.168.79.221 (192.168.79.221) 56(84) bytes of data.

--- 192.168.79.221 ping statistics ---
2 packets transmitted, 0 received, 100% packet loss, time 1000ms

[root@host-192-168-23-115 mysqld]#

OS:CentOS Linux release 7.2.1511 (Core) 3.10.0-327.el7.x86_64 Python:3.7.1