Comments on: Openssh pts fun http://www.excentral.org/archives/2006/06/23/openssh-pts-fun Ex*cen"tral(?), a. [Pref. ex + central.] (Bot.) Out of the center. Fri, 23 Jul 2010 18:10:15 +0000 hourly 1 http://wordpress.org/?v=3.0.1 By: Kristi Keith http://www.excentral.org/archives/2006/06/23/openssh-pts-fun/comment-page-1#comment-9482 Kristi Keith Mon, 16 Oct 2006 12:53:46 +0000 http://www.excentral.org/archives/2006/06/23/openssh-pts-fun/#comment-9482 We have been struggling with this bug since we upgraded to 2.6 (RHEL). We've had an open support ticket with Red Hat since March 2006 but have gotten nothing other than last month an admission there was a bug but they didn't know where. We can reproduce the problem, and the only fix is a reboot. We believe it is caused by how pseudo-terminals are released or re-used when a parent process is killed abnormally (clicking the window button instead of 'exit') and then the child is likewise terminated. Although we can reproduce the failure ("tty problem") the behavior is erratic and seems to depend upon which pts are in use when the tty problem is forced. Our 2 or 3 line (depending on the programmer) program is written in Lahey-Fujitsu Fortran F95. ...Kristi We have been struggling with this bug since we upgraded to 2.6 (RHEL). We’ve had an open support ticket with Red Hat since March 2006 but have gotten nothing other than last month an admission there was a bug but they didn’t know where. We can reproduce the problem, and the only fix is a reboot. We believe it is caused by how pseudo-terminals are released or re-used when a parent process is killed abnormally (clicking the window button instead of ‘exit’) and then the child is likewise terminated. Although we can reproduce the failure (“tty problem”) the behavior is erratic and seems to depend upon which pts are in use when the tty problem is forced. Our 2 or 3 line (depending on the programmer) program is written in Lahey-Fujitsu Fortran F95.
…Kristi

]]> By: Matt http://www.excentral.org/archives/2006/06/23/openssh-pts-fun/comment-page-1#comment-9153 Matt Thu, 28 Sep 2006 15:40:03 +0000 http://www.excentral.org/archives/2006/06/23/openssh-pts-fun/#comment-9153 There's a closed bugzilla entry about it, if you could add your info to it we might be able to get it re-opened... I'll track down who I can from this end and see what can be done as well. It's a nasty little bug. :( bz: https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=128154 Matt There’s a closed bugzilla entry about it, if you could add your info to it we might be able to get it re-opened… I’ll track down who I can from this end and see what can be done as well. It’s a nasty little bug. :(

bz: https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=128154

Matt

]]> By: Richard http://www.excentral.org/archives/2006/06/23/openssh-pts-fun/comment-page-1#comment-9116 Richard Mon, 25 Sep 2006 21:19:53 +0000 http://www.excentral.org/archives/2006/06/23/openssh-pts-fun/#comment-9116 Experienced this same problem. The machine had been recently built with the latest RHEL 4ES and updated to the lastest fixes. I had been working on the machine all day with multiple logins and all of a sudden I could no longer establish any new logins and had the same messages in the secure log file you found. I tried your fix of unmount and remount of /dev/pts and its working now. I guess its possible RedHat may have provided new updates with the old bug?? Experienced this same problem. The machine had been recently built with the latest RHEL 4ES and updated to the lastest fixes. I had been working on the machine all day with multiple logins and all of a sudden I could no longer establish any new logins and had the same messages in the secure log file you found. I tried your fix of unmount and remount of /dev/pts and its working now. I guess its possible RedHat may have provided new updates with the old bug??

]]> By: Felix http://www.excentral.org/archives/2006/06/23/openssh-pts-fun/comment-page-1#comment-8381 Felix Fri, 11 Aug 2006 22:06:49 +0000 http://www.excentral.org/archives/2006/06/23/openssh-pts-fun/#comment-8381 I found this while searching for help for the same symptoms. However, rebooting does not fix the problem. Th eproblem showed up on a system which had been running for at least several days, and had not been updated or had any configuration changes that I remember just before it began failed. I had ssh'd in without problems just five minutes before. I found this while searching for help for the same symptoms. However, rebooting does not fix the problem. Th eproblem showed up on a system which had been running for at least several days, and had not been updated or had any configuration changes that I remember just before it began failed. I had ssh’d in without problems just five minutes before.

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