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Re: "pbuf_flush: time elapsed" problem

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  • Subject: Re: "pbuf_flush: time elapsed" problem
  • Date: Wed, 19 Oct 2005 09:11:25 -0600
Justin,

I figured it was something like that.

I need to think a bit.  I'll get back to you as soon as I can.

Regards,
Steve Emmerson

------- Original Message

Date:    Wed, 19 Oct 2005 09:16:45 -0400
From:    Justin Cooke <address@hidden>To:      Steve Emmerson <steve@uni
          data.ucar.edu>
cc:      Paula Freeman <address@hidden>,
         Brent Gordon <address@hidden>, address@hidden
Subject: Re: "pbuf_flush: time elapsed" problem

Steve...a few clarifications,

>
> On Oct 18, 2005, at 5:06 PM, Steve Emmerson wrote:
>>
>> I assume that when you say "our NEXRAD2 feed" that you mean the 
>> UPSTREAM
>> LDM process that's sending NEXRAD2 data-products.  Please tell me if
>> this assumption is incorrect.
>

Actually I was wrong in my earlier email, we are talking about the 
downstream ldm that is placing NEXRAD2 into our product queue.  The 
process that is getting data from the upstream LDM server is what is 
hanging.

> The LDM system that feeds us is restarted twice a day, that's why 
> there is a connection failure ~14:15.  At 14:54 I sent the 1228948 
> process a USR2 to go into verbose mode, once data stopped being 
> received by the upstream LDM we attached truss.
>
> Again, this only seems to happen when the upstream ldm is in verbose 
> mode.  This process ran for 5 days in silent mode with no problems but 
> stopped after 3 hours once it was put into verbose.

Here when I refer to the "upstream ldm" I should have been saying 
"downstream ldm", I was confused on the terminology of what processes 
are considered upstream or downstream.  Since we do not send products 
to any other machine through LDM I considered all processes to be 
upstream since that is where they are receiving data from.  I didn't 
consider the processes actually putting products into the queue on our 
machine to be downstream.  But they actually are.

Hopefully this is clear...

Justin

------- End of Original Message