On 20-Nov-08, at 3:57 PM, Nathan Rixham wrote:
Rene Fournier wrote:
On 20-Nov-08, at 12:44 PM, Daniel P. Brown wrote:
On Thu, Nov 20, 2008 at 2:41 PM, Rene Fournier
<m5@xxxxxxxxxxxxxxxx> wrote:
There is no firewall between any of the servers -- they are all
on the same
LAN.
I read when you said that, but I must not have explained myself
well enough before. Sorry.
Linux, by default, has firewalls installed with the OS. It
doesn't matter whether you're on a LAN, WAN, or all by your
lonesome.
That's a good point, but I don't believe it can explain the
failures, since even though one process repeatedly fails at an HTTP
request to Server A, several other processes on the same box are
successfully executing HTTP requests (file_get_contents()).
It seems to me that I'm periodically maxing-out a certain per-
process resource limit. For example, number of open files or
something similar... (Assuming file_get_contents() counts as
that)... After 10-60 seconds, previous open files/connections for
that particular process close, allowing it to again open HTTP
requests to Server A. I
I guess my next question is, what resource does file_get_contents()
use upon execution?
...Rene
is it an https(ssl) address you're calling, and more specifically
IIS servers? if so they don't close the connection properly meaning
the connections will be left open until they time out andthus cause
you're problem.
Nope, it's just http, port 80, and not to IIS. To be clear, PHP
scripts/processes on Server A (Mac OS X Server 10.4.11, PHP 5.2.4) are
issuing these http requests (file_get_contents) to Servers B (Centos
5.2) and itself (Server A).
The failures occur on attempts to Server B and A (itself), but only in
one process at a time. (Server A is running several identical scripts/
processes -- even while one fails for a while, the others work -- that
is, Servers B and A respond fine.)
...Rene
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