This should most definitely not happen.  I'll look in to it.

On Fri, Jan 28, 2011 at 5:18 AM, Michal Sojka <sojkam1@fel.cvut.cz> wrote:

> Hi Austin,
>
> when I switched to using your custom query parser I started experiencing
> "Unable to get write lock" errors when I run my initial tagging script.
> I thought that this was because I run the script while processing the
> mail in Emacs, but today I realized that this happens even without Emacs
> and that it can be reproduced by a simple command below.
>
> i=0; while notmuch tag +xxx tag:whatever; do i=$((i+1)); echo $i; done
>
> It seems that sometimes the unlocking of the Xapian database happens
> somewhat lazily and when the subsequent command starts I get:
>
> A Xapian exception occurred opening database: Unable to get write lock on
> /home/wsh/mail/.notmuch/xapian: already locked
>
> This happens almost regularly after a few iterations of the loop even if
> the query doesn't match anything.
>
> Do you have an idea what may cause this?
>
> Can you reproduce this on your system?
>
> The version I use can be obtained from
>
>  git://rtime.felk.cvut.cz/notmuch.git custom-query-pasrser
>
> Thanks
> -Michal
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