Unable to start new processes
klarsen1 at gmail.com
Tue Aug 24 11:09:23 UTC 2010
On 08/23/2010 09:31 PM, Chris MacDonald wrote:
> Hello all,
> You'll have to bear with me here; these are remote machines I don't
> have physical access to, but a co-worker does so I'll be relaying most
> requests for info or commands to be run through him when I can't
> access them remotely.
> I have fully-updated 10.04 installed on 12 different machines, all
> Intel D945GCLF2's with 1GB of RAM and Micron eUSB 4GB flash drives
> formatted ext3. After installing I would periodically run in to
> problems where the devices would stop allowing me to SSH in.
> From my machine the problem manifests itself as an inability to
> request much in the way of data from the remote machine, for instance,
> when I SSH in (ssh -v) it opens a connection, attempts to negotiate a
> session (I get a response from the remote machine), but then promptly
> closes the connection remotely before I get prompted for a password.
> Likewise for the running instance of Tomcat, I'll connect to the http
> port, it will accept my connection, but before I get anything back it
> closes the connection on me. I can ping the remote machine, it shows
> ports as open, I just can't seem to get any data.
> From what I understand on the remote side of things, you can no longer
> get any useful information from the machine. Every command the user
> types in returns immediately to a new bash prompt and as a result,
> issuing the 'reboot' command does nothing, as if it can no longer
> start any new processes. This is making troubleshooting *extremely*
> difficult as I can't figure out a way to get anything from the machine
> while it's on. From what I can tell though, processes that are already
> running remain running, for instance if I get someone to power-cycle
> the machine, I can log in and initiate a VPN connection back to my
> local machine, this remains active even if I can no longer SSH in to
> the remote machine. Another example, snmp traps continue to be sent
> periodically from the remote machine to my desktop (contain the system
> uptime and sensor data from a serial-connected device).
> The problem manifests itself periodically, I can't seem to establish a
> pattern to it, but it happens to all of them eventually. If I don't
> get someone to power-cycle the downed units, inside of two or three
> days the majority (if not all) are unresponsive. I really have no idea
> what the problem is here, nor how I might go about troubleshooting it
> so I'm open to suggestions as to how to proceed.
> Thanks in advance,
It appears you have a problem with ssh. Please give details on
how you have set up ssh. You should have zero problems using Tomcat on
the remote machine.
Karl F. Larsen, AKA K5DI
Key ID = 3951B48D
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