Re: curl-loader crashing network on fedora machine

[Robert I. <cor...@gm...>]

Hi,

On Tue, Apr 1, 2008 at 4:06 PM, MLVJ <ml...@ya...> wrote:
> CURL-LOADER VERSION: 0.44
>
> HP ProLiant DL380
>
> LINUX DISTRIBUTION and KERNEL (uname -r):
> uname -r
> 2.6.15-1.2054_FC5smp
>
> gcc version 4.1.0 20060304 (Red Hat 4.1.0-3)
>
> COMPILATION AND MAKING OPTIONS (if defaults changed):
> $make optimize=1 debug=0
>
> COMMAND-LINE:
>
> ./curl-loader -f nte-conf/bulk.conf
>
> CONFIGURATION-FILE (The most common source of
> problems):
> Place the file inline here:
>
> cat bulk.conf
> ########### GENERAL SECTION
> ################################
>
> BATCH_NAME= bulk
> CLIENTS_NUM_MAX=200 # Same as CLIENTS_NUM
> #CLIENTS_NUM_START=10
> CLIENTS_RAMPUP_INC=5
> INTERFACE =eth0
> NETMASK=16
> IP_ADDR_MIN= 10.59.250.1
> IP_ADDR_MAX= 10.59.250.3
> IP_SHARED_NUM=3
> CYCLES_NUM= -1
> URLS_NUM= 1
>
> ########### URL SECTION
> ####################################
>
> URL=http://10.59.246.45/index.html
> #URL=http://localhost/apache2-default/ACE-INSTALL.html
> #URL=http://localhost/ACE-INSTALL.html
> URL_SHORT_NAME="local-apache"
> REQUEST_TYPE=GET
> TIMER_URL_COMPLETION = 5000
> TIMER_AFTER_URL_SLEEP = 500
>
>
> DESCRIPTION:
> After running the configuration file above, the
> network stops working - can't ping/telnet/ssh/anything
> to or from the machine, on the eth1 management
> interface.
> This makes it very hard to figure out what's going on,
> as the machine is remote to me!
>
> Note that the exact same file, but with ip addresses
> 192.168.1.1 and 192.168.1.3 (as per the example
> bulk.conf) doesn't stop the network.
>
> QUESTION/ SUGGESTION/ PATCH:
> How do we get it working?


Most probably somebody is using the addresses, starting from 10, that
you are trying to use. Reboot your linux (to clean up the secondary addresses
from curl-loader) or delete all secondary and clean the arp caches and ping
to that addresses prior to running curl-loader.

Since you are the second, who reported network problems with curl-loader
(the first was me, when discovered a linux kernel bug, now fixed),
I suspect, that you problems may be also related to your networking card, which
could be its poor or buggy support in your linux distribution.
To resolve it you may wish to install FC-8 or recent Debian.

Yet another option, that your routing somehow gets broken.
Therefore, please, look into your routing table before running curl-loader
and after. Note, that curl-loader does not effect routing tables.
Run traceroute.

Once I have seen a really weird case, where an old switch was auto-synched with
a new server card at 10 Mbps, thus curl-loader has filled the 10 Mbps,
and there was no room
for any other traffic.


All the above options are beyond the area of curl-loader application control.

Best wishes.

>
>
> Sincerely,
> Robert Iakobashvili
> "Light will come from Jerusalem"
> ...........................................................
> http://curl-loader.sourceforge.net
> An open-source web testing and traffic generation.