Hi Leni,

Please, send me privately some examples if this keeps showing up.

You should be able to follow the HTTP headers to look for a network/
proxy issue, but it would be hard to do it if you cannot reproduce the
user's circumstances.

Thanks,
Julian.

On Mar 9, 8:23 pm, Zindus Development <[email protected]> wrote:
> Hi Julian -
>
>  > Does the Zindus Thunderbird Addon retry inserts when an error occurs?
>  > This would explain the 404 and the entry been inserted.
>
> The contact is present on the GET that immediately follows the 404 POST.
>   The pattern is repeated a number of times over a period of some
> minutes (a few successful POSTs then one of these successful 404 POSTs)
> so while a network connectivity issue is of course possible, it would be
> a wierd pattern of network failure.  Also, if the 404 was being returned
> from some intervening point in the network, it would still be left to
> explain why the contact is present on the subsequent GET.  I'm not
> trying to press the issue here - am happy to leave it unexplained if you
> are.
>
> Re: operation rate: when an error occurs the addon only retries after
> some (long) time, unless the user manually initiates another sync, which
> is what happened in this case.
>
> By way of a thought around better pinpointing this class of issue in
> future, is there any way of distinguishing a 404 that comes from Google
> vs from some other origin?  eg. some HTTP header?
>
> Leni.
>
> Julian (Google) wrote:
> > Hi Leni,
>
> > I understand it is difficult to look for the problem if it comes from
> > a user's report. It is really odd to get a 404 and have the entry
> > inserted, my best guess is a network connection problem. Did you get
> > more reports on this issue?
>
> > Does the Zindus Thunderbird Addon retry inserts when an error occurs?
> > This would explain the 404 and the entry been inserted.
>
> > By high operation rate, I mean the number of queries/inserts per
> > second. If the number of errors increases with a high load it is
> > advice to do an exponential back-off on retries.
>
> > -Julian
>
> > On Mar 6, 9:17 pm, Zindus Development <[email protected]> wrote:
> >> Julian (Google) wrote:
> >>> Is this problem still happening or was it just a temporary issue?
> >> It's a problem report from a user of the zindus thunderbird addon, so
> >> you can understand why this is a difficult question to answer.
>
> >>> Were you using Batch or did you have a high operation rate?
> >> Not using batch in this case.  If you let me kow what what you mean by
> >> "high" operation rate I'll answer that :-)
>
> >> If you'd care to speculate on what the issue might be I'd be interested.
> >>   To the extent that the API can be used in a way that minimizes
> >> failures, so much the better.
>
> >> Leni.
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