Varnish 503 error

[Jean Respen]

Hi all,

I sometimes have the following error in my logs:

12 VCL_return   c hash
   12 VCL_call     c miss fetch
   12 Backend      c 15 default default
   12 FetchError   c http first read error: -1 0 (No error recorded)
   12 Backend      c 11 default default
   12 FetchError   c http first read error: -1 0 (No error recorded)
   12 VCL_call     c error deliver
   12 VCL_call     c deliver deliver
   12 TxProtocol   c HTTP/1.1
   12 TxStatus     c 503
   12 TxResponse   c Service Unavailable
   12 TxHeader     c Server: Varnish

Does anyone know what could happen? It is boring, as it gives a 503
error on around 1 over 5 requests.

Thanks,

Cheers,

-- 
Jean Respen