Re: Help with reading strace

On 3/22/06, Andy Green <andy@xxxxxxxxxxx> wrote:
Dan Track wrote:
On 3/22/06, Andy Green <andy@xxxxxxxxxxx> wrote:
Dan Track wrote:

Any idea what is going on? I've tried to figure it out, but I'm not
that great an expert. Again the problem occurred at the space below in
the tcpdump.
Sorry I can't see anything funny about it like repeated ACK packets. It
seems that 10.10.8.24 decides not to send anything new for 5 seconds
from what I can make out, but I admit going crosseyed trying to look at it.

-Andy


Hi

Thanks for the update. Is there any other types of test that I could
run, or utilities I could use to debug this?

I think the first move is to get more idea of the direction of the
problem... for example your strace shows the timeout for the poll()
action is set to 5 seconds, which is a bit suspicious. Do you see
problems in any other protocols or applications on the network?

Check for general network malaise by floodpinging, eg

# ping -f 10.10.8.24

You should see a single flickering . only.


Hi Andy,

So far that problem is only present when connecting to port 1521 on
the remote server (neptune). Not to any other port, the strange thing
is that every other server is fine when connecting to 1521, its just
this one.

When pinging the server (10.10.8.24) I get lots of dots ( about 30)
appear on the screen. I've never used the flood option before so I'm
not sure what to expect. Any ideas?

Thanks
Dan

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