[darcs-users] can't get repository lock

Dan Pascu dan at ag-projects.com
Thu Apr 22 13:13:22 UTC 2010

I forgot to mention that I just upgraded darcs on that machine from  
1.0.9 to 2.4.0. With 1.0.9 I've never seen this and it was running for  
months synchronizing those repositories via cron.

What changed in all this was the darcs version on the machine doing  
the pull (from 1.0.9 to 2.4.0) and the source repositories that were  
upgraded from the darcs-1 format to the hashed format.

I will upgrade the destination repositories to the hashed format as  
well and I'll report back if that changed anything.

On 22 Apr 2010, at 15:43, Dan Pascu wrote:

> In the same context I mentioned before (a cron job running darcs  
> pull -aq for about 8 repositories every 30 minutes) I see this  
> message sometimes:
> Waiting for lock /home/repositories/callcontrol/_darcs/lock
> Couldn't get lock /home/repositories/callcontrol/_darcs/lock
> The repository name may vary, but it's a subset of the 8  
> repositories (I've seen 2-3 of them regularly while the others I  
> never seen giving this error).
> Any idea what could be causing this?
> I should mention that none is doing any write operations in those  
> repositories except the cron job that does pull regularly. Otherwise  
> the repositories are used by trac-darcs in a read-only mode (show  
> patches, files, ...). Is it possible that a read-only operation that  
> trac-darcs uses to inspect the repo may lock it so a pull is not  
> possible at that moment?
> --
> Dan
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