[Bug 1010] SSH sometimes hangs on exit when multiple forwarded X11 clients are closed
bugzilla-daemon at mindrot.org
bugzilla-daemon at mindrot.org
Wed Apr 6 06:38:48 EST 2005
http://bugzilla.mindrot.org/show_bug.cgi?id=1010
Summary: SSH sometimes hangs on exit when multiple forwarded X11
clients are closed
Product: Portable OpenSSH
Version: 4.0p1
Platform: All
OS/Version: Linux
Status: NEW
Severity: normal
Priority: P2
Component: sshd
AssignedTo: openssh-bugs at mindrot.org
ReportedBy: t8m at centrum.cz
SSH sometimes hangs on exit when multiple forwarded X11 clients are closed.
This is not easy to reproduce however here are the steps which make it to
reproduce almost 100% for me:
1. ssh -Y host
2. xsm ; exit in the ssh session
3. for i in `seq 1 50` ; do (nice -20 xterm &) ; done in the xterm which was
started from xsm
4. after all the xterms are up and running shutdown immediately the xsm
Expected result:
ssh session ended normally
What really happens:
ssh session hangs
After looking at the debug log from the sshd it seems that some of the X11
channels are stuck waiting for output drain however it won't happen as the other
end - the xterm - already exited.
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