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Hi,my server version is Ubuntu 18.04.3 LTS. When I use ping command, all
the sessions will be closed and returned socket error 10053. However,it
is normal when I ping the valid address likes: ping -c 4
bugs.launchpad.net. But when I ping other address which would return
"Destination Host Unreachable", all the distal session in putty or
another shell would be colsed with "Connection closed by foreign host".
Other commands like netcat have the same error.
I checked the syslog without no returned error after using ping for this
strange phenomenon, through syslog included some related information:
syslog.1:Oct 22 21:15:16 dell systemd-timesyncd[1298]: Synchronized to time
server 91.189.89.199:123 (ntp.ubuntu.com).
syslog.1:Oct 22 21:17:35 dell systemd-timesyncd[1298]: Timed out waiting for
reply from 91.189.89.199:123 (ntp.ubuntu.com).
or
messages:Oct 22 23:14:53 dell blueman.desktop[3974]:
ERROR:dbus.proxies:Introspect error on org.bluez:/:
dbus.exceptions.DBusException: org.freedesktop.DBus.Error.TimedOut: Failed to
activate service 'org.bluez': timed out (service_start_timeout=25000ms)
messages:Oct 22 23:14:53 dell blueman.desktop[3974]:
ERROR:dbus.proxies:Introspect error on org.bluez:/org/bluez:
dbus.exceptions.DBusException: org.freedesktop.DBus.Error.TimedOut: Failed to
activate service 'org.bluez': timed out (service_start_timeout=25000ms)
messages:Oct 22 23:14:53 dell blueman.desktop[3974]:
ERROR:dbus.proxies:Introspect error on org.bluez:/:
dbus.exceptions.DBusException: org.freedesktop.DBus.Error.TimedOut: Failed to
activate service 'org.bluez': timed out (service_start_timeout=25000ms)
I guess some daemon programs may peform their function via ping or other
ways. User sessions always be closed immediately and connection refusion
time usually takes no more than 1 min, and it won't kill running jobs in
closed session.
Especially, this phenomenon never happens in apt-get and conda or wget
command.
I have no idea what lead to this strange phenomenon. Please give me
advice.
Thanks!
** Affects: iputils (Ubuntu)
Importance: Undecided
Status: New
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Xubuntu ping command leading to all of sessions closed
https://bugs.launchpad.net/bugs/1849416
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