[Dxspider-support] Cluster Lock-Up

[Ian J Maude]

Dirk Koopman wrote:
> Danilo Brelih wrote:
>   
>> Anthony (N2KI) pravi:
>>
>>     
>>> Unfortuneately this is an intermittant problem. The only good lead is that
>>> it happens at the same time (2351Z) when it does.
>>>       
>> We crashed tonight same time seems same problem !
>>
>> http://s50clx.infrax.si:41115/statistika/msg.html
>>
>> DX Spider Cluster version 1.54 (build 0.164) on Linux
>> Copyright (c) 1998-2007 Dirk Koopman G1TLH
>> S50U de S50CLX  9-Oct-2007 1225Z 2.3522  dxspider >
>>
>>     
>
> I am embarrassed to say that there appears to be a long standing error 
> in the PC9x sentence deduping code that caused a enormous loop last 
> night. This caused a huge spike in the amount of traffic. Something that 
> I have not seen before, somewhat surprisingly.
>
> As some of you may know, I am using the number of seconds in a day as a 
> deduping mechanism. This means that at midnight, the number rolls over 
> from 86399 -> 0. Last night we had a loop because we were getting PC92, 
> from an (italian) station whose clock was / is wildly out, PC92 C 
> records with a time of 85967 and an A record of 518. Now the time 
> checking that was being done only worked for clocks that were nearer UTC 
> than this station.
>
> I believe that I have fixed this so I don't rely on other nodes being 
> syncronised to UTC (although you should really all be).
>
> This means, sadly, and rather embarrassingly, I have ask people to 
> upgrade again. However I would wait until tomorrow (or at least 02:00Z) 
> to see whether, this time, I really have fixed it...
>
> Mea culpa
>
> Dirk
>
> PS Please just upgrade using CVS or CVSlatest.zip/tgz silently. You 
> don't need to tell the list that you have done it. I will know (or at 
> least I can find out by looking at the PC92s you send) anyway.
>
>
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>
>
>   
Forget that, it now seems OK, weird!

Ian

-- 
Ian J Maude G0VGS
SysOp GB7MBC DX Cluster
Member of RSGB, GQRP
K2 #4044 | K3 #?