* [Help] Strange Linux server no response problem, fixed by hitting ENTER at console!
@ 2004-07-21 8:51 Charles
2004-07-21 13:47 ` Chris DiTrani
0 siblings, 1 reply; 3+ messages in thread
From: Charles @ 2004-07-21 8:51 UTC (permalink / raw)
To: linux-admin
Dear all,
Recently one of our servers randomly stop responding, but it does not hang.
When the problem happens, all the network services stop responding, but
the server is still running. Then many processes are queued up and cause the
avg no. of process running sky to over 100 in 10min! If I was connecting an
ssh to the server, it just stop response but the connection is still there.
ping also has response.
The most strange thing is, when I press an ENTER key at the console, the
problem solved instantly and everything back to normal. Even my ssh connection
will have response again.
Our server's config:
Hardware: Dual P3-700Mhz, 640M RAM, 2 x 10G IDE HDD running Software RAID-1
OS: RedHat Linux 8.0
kernel: kernel-2.4.18-14smp
Special config:
- freeswan-1.99_x509_0.9.15_2.4.18_14 installed
Do you know what happens and kindly give me any suggestions? Thanks!
Best Regards,
Charles
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^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [Help] Strange Linux server no response problem, fixed by hitting ENTER at console!
@ 2004-07-21 13:41 George Iosif
0 siblings, 0 replies; 3+ messages in thread
From: George Iosif @ 2004-07-21 13:41 UTC (permalink / raw)
To: charles; +Cc: linux-admin
Hi Charles,
Try stoping the APMD service and see if it solves your problem.
George Iosif
>>> "Charles" <charles@aib.net> 07/21/04 11:51 AM >>>
Dear all,
Recently one of our servers randomly stop responding, but it does not
hang.
When the problem happens, all the network services stop responding, but
the server is still running. Then many processes are queued up and cause
the
avg no. of process running sky to over 100 in 10min! If I was connecting
an
ssh to the server, it just stop response but the connection is still
there.
ping also has response.
The most strange thing is, when I press an ENTER key at the console, the
problem solved instantly and everything back to normal. Even my ssh
connection
will have response again.
Our server's config:
Hardware: Dual P3-700Mhz, 640M RAM, 2 x 10G IDE HDD running Software
RAID-1
OS: RedHat Linux 8.0
kernel: kernel-2.4.18-14smp
Special config:
- freeswan-1.99_x509_0.9.15_2.4.18_14 installed
Do you know what happens and kindly give me any suggestions? Thanks!
Best Regards,
Charles
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* Re: [Help] Strange Linux server no response problem, fixed by hitting ENTER at console!
2004-07-21 8:51 [Help] Strange Linux server no response problem, fixed by hitting ENTER at console! Charles
@ 2004-07-21 13:47 ` Chris DiTrani
0 siblings, 0 replies; 3+ messages in thread
From: Chris DiTrani @ 2004-07-21 13:47 UTC (permalink / raw)
To: Charles; +Cc: linux-admin
On Wed, 2004-07-21 at 04:51, Charles wrote:
> Dear all,
>
> Recently one of our servers randomly stop responding, but it does not hang.
>
> When the problem happens, all the network services stop responding, but
> the server is still running. Then many processes are queued up and cause the
> avg no. of process running sky to over 100 in 10min! If I was connecting an
> ssh to the server, it just stop response but the connection is still there.
> ping also has response.
>
> The most strange thing is, when I press an ENTER key at the console, the
> problem solved instantly and everything back to normal. Even my ssh connection
> will have response again.
If this is a server/BIOS/kernel/module combo that has been running
without this problem for a while, my guess is you have have failing
hardware. Feels like an interrupt problem (kernel/module can't clear an
interrupt, keyboard interrupt kicks things along??). What cpu usage
like?
You might try rebuilding/installing the kernel/modules (good excuse to
upgrade to latest 2.4), and if the problem persists I'd pin it on the
hardware. Could be a bus device or something on the mainboard.
This might be enough of a brain-teaser that you could post it on the
kernel list and not get ridiculed.
CD
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2004-07-21 8:51 [Help] Strange Linux server no response problem, fixed by hitting ENTER at console! Charles
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2004-07-21 13:41 George Iosif
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