Re: Lost tty and 100% cpu

From: "Aldrey Galindo" <aldreygalindo@xxxxxxxxx>
Date: Fri, 11 Jul 2008 23:12:28 -0300

Sorry, was using the command 'trap' that had just arresting. Thanks to all.

Aldrey Galindo

2008/7/9 Aldrey Galindo <aldreygalindo@xxxxxxxxx>:

My OS is a RHEL 5 x86_64. It has an application that receives an
average of about 500 simultaneous connections. The version of SSH is
the 'openssh-4.3p2-24.el5'. When someone enters the application is
'├─sshd(23445)───sshd(23499)───bash(23500)───app.sh(23528)──-app.bin(23558)".
I do not know the reason, the more times the connection is lost tty,
the bash and app.bin 100% cpu. We "simulate" the situation with 'kill
-15 23499', (pid 23499- | \_ sshd: xxx@pts/327 ). Does anyone have
any idea? Suggestions?

Aldrey Galindo

References:
- Lost tty and 100% cpu
  - From: Aldrey Galindo

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Lost tty and 100% cpu
... My OS is a RHEL 5 x86_64. ... average of about 500 simultaneous connections. ... The version of SSH is ... Aldrey Galindo ...
(SSH)
Re: Reboot in output from "last":
... >> limit it to 1-2 simultaneous connections. ... Perusing "man ssh" and ssh_config I see only ... then you could indeed implement some serious throttling (max ... > CPU time, max concurrents, etc). ...
(comp.os.linux.security)