[Dxspider-support] Cluster freezing up after short while

[Aurelio - PC5A]

Hello,

DXSpider PI5EHV-8 is "freezing up".
If I start the cluster either automatically or by hand 
(~/perl/cluster.pl) the data flow freezes after 20-30 minutes. Connects 
are no longer possible and no data is written to the debug file.
When starting the cluster all the start-up lines look normal, nothing 
that says not OK or fail.
Also the last lines of the debug file don't give me any clue:

<- I PI4TUE-8 PC41^N4ABN^3^28 1 N 81 48 W^H28^~
<- I PI4TUE-8 PC92^W1NR-9^43234^K^5W1NR-9:5455:0.115^1^0^H94^
<- I PI4TUE-8 PC61^14076.0^RW9YE^14-Sep-2012^1200Z^TNX J65 GL 
73!^BI7MCK^4M5DX^120.85.140.148^H27^~
-> D DL5DSM DX de BI7MCK:    14076.0  RW9YE        TNX J65 GL 
73!                 1200Z%07%07
-> D DM0MW DX de BI7MCK:    14076.0  RW9YE        TNX J65 GL 
73!                 1200Z OL62%07%07
-> D 9A0CSI DX de BI7MCK:    14076.0  RW9YE        TNX J65 GL 
73!                 1200Z OL62%07%07
-> D PA1BR DX de BI7MCK:    14076.0  RW9YE        TNX J65 GL 
73!                 1200Z OL62%07%07
-> D DJ1VT DX de BI7MCK:    14076.0  RW9YE        TNX J65 GL 
73!                 1200Z%07%07
-> D SP6YRE-9 DX de BI7MCK:    14076.0  RW9YE        TNX J65 GL 
73!                 1200Z OL62%07%07
-> D DL3PN-2 DX de BI7MCK:    14076.0  RW9YE        TNX J65 GL 
73!                 1200Z%07%07
-> D ON4LN DX de BI7MCK:    14076.0  RW9YE        TNX J65 GL 
73!                 1200Z%07%07
-> D HA1ZY DX de BI7MCK:    14076.0  RW9YE        TNX J65 GL 
73!                 1200Z OL62%07%07
-> D ON4BAV DX de BI7MCK:    14076.0  RW9YE        TNX J65 GL 
73!                 1200Z%07%07
-> D HS0ZER DX de BI7MCK:    14076.0  RW9YE        TNX J65 GL 
73!                 1200Z OL62%07%07
<- I PI4TUE-8 PC61^14002.2^HA100CGCDH^14-Sep-2012^1200Z^qsl via 
HA0MO^HA0LP-10^F5LEN-7^213.251.189.208^H1^~

During the freeze the load is quite high (load average: 0.91, 0.94, 
0.71, usually all three are close to 0)

Anyone any idea's what this is about or what I can try to check?

73
-- Aurelio