On Fri, 31 Aug 2007, Steven Lazarus wrote:
We recently upgraded to the latest version of ldm and are now having
trouble receiving data from one of our feeds (suominet data). Below is a
Aug 30 01:20:37 cumulus suomildm1.cosmic.ucar.edu[898] NOTE: nullproc_6
failure to suomildm1.cosmic.ucar.edu; RPC: Timed out Aug 30 01:24:07
cumulus suomildm1.cosmic.ucar.edu[898] ERROR: Disconnecting due to LDM
failure; Couldn't connect to LDM on suomildm1.cosmic.ucar.edu using
either port 388 or portmapper; : RPC: Remote system error - Connection
timed out Aug 31 01:20:57 cumulus suomildm1.cosmic.ucar.edu[898] ERROR:
Disconnecting due to LDM failure; nullproc_6 failure to
suomildm1.cosmic.ucar.edu; RPC: Unable to receive; errno = Connection
reset by peer ___________
Not sure what is going on. We made sure that the port (388) is open
(cleared the firewall). Apparently the data were sporadically flowing
when our ldm was using an unretricted port # - now nothing is flowing!
The upstream provider notes that their ldmd.log file shows steady RPC
unable to receive messages, and starting up messages that are logged
before the error and exit messages from the last connection.
This sounds like their iptables or firewall is turned on at full blast.
And if they just did an OS upgrade, there's a good chance, by default, the
firewall is turned on and blocks everything except mail (when I installed
Fedora Linux 7, that was certainly the case). A firewall problem may have
gotten you some data before, but the new LDM and OS probably don't
tolerate that.
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Gilbert Sebenste ********
(My opinions only!) ******
Staff Meteorologist, Northern Illinois University ****
E-mail: sebenste@xxxxxxxxxxxxxxxxxxxxx ***
web: http://weather.admin.niu.edu **
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