[Bug 349919] Re: ssh client sometimes hangs
Just upgraded to 9.10 - Karmic. Agree with Thierry Carrez that bug is not reproducible on Karmic (3000 iterations of the while :; do ssh localhost date; done loop without a hang (8.10 and 9.04 would always hang in 100 iterations). -- ssh client sometimes hangs https://bugs.launchpad.net/bugs/349919 You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to openssh in ubuntu. -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
[Bug 349919] Re: ssh client sometimes hangs
Can't reproduce on karmic. Please reopen if the bug is still present for you in that release. ** Changed in: openssh (Ubuntu) Importance: Undecided = Low ** Changed in: openssh (Ubuntu) Status: New = Fix Released -- ssh client sometimes hangs https://bugs.launchpad.net/bugs/349919 You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to openssh in ubuntu. -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
[Bug 349919] Re: ssh client sometimes hangs
I can confirm the bug in Karmic when logging in from a Jaunty one. Steps: 1)ssh -X karmicmachine 2)gnome-system-monitor 3)wait for gnome-system-monitor to show up and close it 4)ps (you will see 'dbus-launch' apart from 'bash' and 'ps') 5)exit 6)ssh hangs :( The problem seem to be related to dbus-launch somehow, because when i kill it before typing 'exit', ssh logs out without troubles. -- ssh client sometimes hangs https://bugs.launchpad.net/bugs/349919 You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to openssh in ubuntu. -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
[Bug 349919] Re: ssh client sometimes hangs
On jaunty 9.04, i386 I experience the same bug. Sometimes, when logging out the remote shell, ssh freezes locally after saying logout. In such cases I have to use Ctrl-C. The bug seem happen more often when tunneling graphics, than when not using this ability. The bug is not critical, however, because Ctrl-C has allways helped. -- ssh client sometimes hangs https://bugs.launchpad.net/bugs/349919 You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to openssh in ubuntu. -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
[Bug 349919] Re: ssh client sometimes hangs
Just upgraded to 9.04 (Jaunty Jackalope). No change in behaviour. The while : do ssh localhost date done loop still hangs periodically (and can often be unjammed by running another ssh somesystem ... in another terminal window. -- ssh client sometimes hangs https://bugs.launchpad.net/bugs/349919 You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to openssh in ubuntu. -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
[Bug 349919] Re: ssh client sometimes hangs
** Description changed:
$ lsb_release -rd
Description: Ubuntu 8.10
Release: 8.10
$ apt-cache policy openssh-client
openssh-client:
Installed: 1:5.1p1-3ubuntu1
Candidate: 1:5.1p1-3ubuntu1
Version table:
*** 1:5.1p1-3ubuntu1 0
500 http://us.archive.ubuntu.com intrepid/main Packages
100 /var/lib/dpkg/status
I have .ssh key files that I generated years ago. I copied them to
~/.ssh on my ubuntu system. Most of the time when I use ssh to run a
command on another system it works fine. Once in 50 times ssh hangs
locally.
This is not a network problem ... same issue happens with localhost.
E.g. if I run:
$ while :
do ssh localhost date
done
It will print the date a few dozen times, then the loop hangs (^C
interrupts it).
I tried using strace to see what was happening. The ssh process was hung
reading from a socket.
Looking back through the strace, the socket was connected to some local
keyring thing.
Here are some relevent lines from strace output:
socket(PF_FILE, SOCK_STREAM, 0) = 4
fcntl(4, F_SETFD, FD_CLOEXEC) = 0
connect(4, {sa_family=AF_FILE, path=/tmp/keyring-fed2nU/ssh}, 110) = 0
write(4, \0\0\0\1, 4) = 4
write(4, \v, 1) = 1
read(4, \0\0\2h, 4) = 4
read(4, \f\0\0\0\2\0\0\0\225\0\0\0\7ssh-rsa\0\0\0\1#\0\0\0\201..., 616) =
616
write(3, $K \250\310\200\247\266-\25\257\212f\226h\234\f\275a\310..., 64) =
64
select(4, [3], NULL, NULL, NULL)= 1 (in [3])
read(3, \34t\351\267\262/\362\315\33\r\3019\301\361dX\264\276\377..., 8192)
= 80
futex(0x7f956651f2e0, 0x81 /* FUTEX_??? */, 2147483647) = 0
futex(0x7f956651f160, 0x81 /* FUTEX_??? */, 2147483647) = 0
futex(0x7f9567385450, 0x81 /* FUTEX_??? */, 2147483647) = 0
futex(0x7f9567159590, 0x81 /* FUTEX_??? */, 2147483647) = 0
futex(0x7f95671599d0, 0x81 /* FUTEX_??? */, 2147483647) = 0
open(/dev/urandom, O_RDONLY) = 5
fstat(5, {st_mode=S_IFCHR|0666, st_rdev=makedev(1, 9), ...}) = 0
read(5, \21\207y;\216\357\361\37\310\230\300\211GYpr\236a\235\t..., 20) = 20
close(5)= 0
write(3, \314\331h\3711\274\2...@\201\201vg\ro\230\273d\2778X2..., 240) =
240
select(4, [3], NULL, NULL, NULL)= 1 (in [3])
read(3, \234?r\352\30(\373T\277!bm\224W\30P\247\270\313\234\341..., 8192) =
192
brk(0x7f95690d9000) = 0x7f95690d9000
brk(0x7f95690d8000) = 0x7f95690d8000
write(4, \0\0\1\207, 4) = 4
write(4, \r\0\0\0\225\0\0\0\7ssh-rsa\0\0\0\1#\0\0\0\201\0\300\r..., 391) =
391
read(4, 0x7fff703fa880, 4) = ? ERESTARTSYS (To be restarted)
--- SIGINT (Interrupt) @ 0 (0) ---
+++ killed by SIGINT +++
+
+
+ A hung ssh process is often revived when some other outging ssh request
+ is initiated. Quite often the snoozy process wakes up and runs normally.
+ But sometimes it wakes up and reports a failed connection.
--
ssh client sometimes hangs
https://bugs.launchpad.net/bugs/349919
You received this bug notification because you are a member of Ubuntu
Server Team, which is subscribed to openssh in ubuntu.
--
Ubuntu-server-bugs mailing list
Ubuntu-server-bugs@lists.ubuntu.com
Modify settings or unsubscribe at:
https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
