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[LDM #RTA-128892]: Interpretation of "INFO sending" and "error.c:err_log:236"

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  • Subject: [LDM #RTA-128892]: Interpretation of "INFO sending" and "error.c:err_log:236"
  • Date: Thu, 29 Aug 2019 11:31:52 -0600
Gregg,

> Thanks for the information.
> 
> While I was searching the archives last night I noticed a number of INFO
> sending entries in other emails with NO error messages.
> 
> So what causes the error message?

It's not an error message. It simply indicates what data-product is about to be 
sent.

> I ask because there is some limited bandwidth issues between the upstream
> LDM and downstream LDM within the local LAN (e.g. < 1 Mbps, when the
> network is 1 Gbps, there are some switches and firewalls between the two
> LDM systems).  So the upstream LDM has lots of data being inserted into the
> queue, but the downstream LDM doesn't receive it all.  Thus, I was thinking
> the error in the log file was something to do about a failure in deliverysimpl
> on the system being described, as the systems in the email archives didn't
> always have the error message.

If the connection from the sender to the receiver is sufficiently slow, then 
the latency of the data-products will slowly increase until it is greater than 
the maximum latency parameter in the LDM registry. At that point, the received 
data-products will simply be discarded rather than being inserted into the 
product-queue.

The connection can be slow because of insufficient bandwidth or because 
something between the sender and receiver is discarding packets (e.g., a 
firewall, traffic throttling system, or intrusion prevention system).

Regards,
Steve Emmerson

Ticket Details
===================
Ticket ID: RTA-128892
Department: Support LDM
Priority: Normal
Status: Closed
===================
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