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HTTP server internal errors when sending trickle

HTTP server internal errors when sending trickle

Questions and Answers : Unix/Linux : HTTP server internal errors when sending trickle
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Andris Pavenis

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Message 31314 - Posted: 9 Nov 2007, 8:16:06 UTC

I\'m often (not 100% time) getting error messages like

2007-11-09 09:37:56 [climateprediction.net] Sending scheduler request: To send trickle-up message
2007-11-09 09:37:56 [climateprediction.net] (not requesting new work or reporting completed tasks)
hadsm3fub_e065_005907913 - PH 3 TS 0223201 A - 01/11/2063 00:30 - H:M:S=0186:04:44 AVG= 0.90 DLT= 1.00
hadsm3fub_0523_005908484 - PH 1 TS 0173377 A - 13/12/1820 00:30 - H:M:S=0046:44:41 AVG= 0.97 DLT= 0.92
2007-11-09 09:38:52 [climateprediction.net] Scheduler request failed: HTTP internal server error
2007-11-09 09:38:52 [climateprediction.net] Deferring communication for 15 min 22 sec
2007-11-09 09:38:52 [climateprediction.net] Reason: scheduler request failed

when CPDN tries to send trickle. If it would be 100% time, then I would perhaps suspect firewall on my side. Sending trickle however often goes without errors.

Sample of output of tcpdump of failed trickle sending
is at http://ap1.pp.fi/tmp/cpdn-tcpdump.dat.bz2.

It happens also bit to often to suspect CPDN server (unless they are heavily overloaded). CPDN Server status page also does not show any problems


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Message 31315 - Posted: 9 Nov 2007, 8:40:20 UTC


What is your networking setup like? (home PC, work PC, university PC, on broadband, dialup, wireless, ...? Does it use a proxy server?)

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Andris Pavenis

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Message 31334 - Posted: 12 Nov 2007, 16:03:38 UTC - in response to Message 31315.  


What is your networking setup like? (home PC, work PC, university PC, on broadband, dialup, wireless, ...? Does it use a proxy server?)


Home PC, ADSL (currently 4M/512K), WLAN, no proxy server in use. I had this problem with Fedora 7. I updated to released Fedora 8 (had to do a fresh install as upgrade did not work) and exactly now I\'m seeing the same problem again.

This problem happens much more often with HadCM3 trickles rather rather than HadSM3 ones (HadSM3 ones usually succeed on HadCM3 usually only after retries).

Computer ID 750202, HadCM3 work unit ID 6081946.



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Message 31336 - Posted: 12 Nov 2007, 16:59:14 UTC
Last modified: 12 Nov 2007, 17:03:25 UTC


Normally I\'d think it was something to do with the client-side (proxy server, bad firewall, etc), but a couple of other people have noticed these in the last few days. This might indicate that the problem is happening intermittently at CPDN.

Not sure what to suggest yet (we\'re discussing this elsewhere).

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Questions and Answers : Unix/Linux : HTTP server internal errors when sending trickle

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