[zeromq-dev] 0MQ multicast message lost?

[Steven McCoy]

On 8 October 2010 20:40, <ntupel at googlemail.com> wrote:

> Trace: NCF retry #322 attempt 1/50.
> Trace: NCF retry #323 attempt 1/50.
> ...
> Trace: NCF retry #359 attempt 1/50.
> Trace: NCF retry #360 attempt 1/50.
> Trace: NCF retry #472 is delayed 0.200000 seconds.
>

Basically the receiver is waiting for a NAK confirmation from the sender and
trying again, indicating double data loss.


> Assertion failed: false (poller_base.cpp:64)
> Aborted
>
>
Missing timer, or rather failure trying to cancel a cancelled timer, not
sure how this can occur.  File a bug on github, a stack trace would be
pretty handy.


>
> For completeness this is logged on sender side:
>
>
> Trace: Failed to push retransmit request for #322
> Trace: Recv again on not-full
> Trace: Recv again on not-full
> Trace: Failed to push retransmit request for #472
>

Source is dropping NAKs as the sequences are outside of the transmit window.
 Usual ways forward are increasing the transmit window size or decreasing
the transmission rate.

-- 
Steve-o
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