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From "Shawn Heisey (JIRA)" <>
Subject [jira] [Commented] (IVY-1388) *.lck files created by "artifact-lock" lock strategy are not cleaned up if ivy quits abruptly
Date Sun, 26 Oct 2014 20:04:33 GMT


Shawn Heisey commented on IVY-1388:

Since I don't actually know how to integrate ivy with ant, I don't know how to use the lock
strategy info you gave me.  I can start a discussion on dev@lucene.a.o.

I believe that this behavior should be considered a bug.  If something catastrophic had happened,
like a kernel panic or losing power, then I could understand the lock file being left behind
... but it's happening as a result of ctrl-c.  I would have expected the shutdown hook (fix
for this issue) to have dealt with that problem, but apparently the fix wasn't complete enough.

I have already filed IVY-1489 for the continuing problems I've observed.

> *.lck files created by "artifact-lock" lock strategy are not cleaned up if ivy quits
> ---------------------------------------------------------------------------------------------
>                 Key: IVY-1388
>                 URL:
>             Project: Ivy
>          Issue Type: Bug
>    Affects Versions: 2.2.0, 2.3.0-RC1, trunk
>            Reporter: Wei Chen
>            Assignee: Nicolas Lalevée
>             Fix For: 2.3.0
>         Attachments:, patch1.patch
>   Original Estimate: 0.5m
>  Remaining Estimate: 0.5m
> We have a few build processes running in parallel, all of which share the same ivy cache.
In order not to run into any parallel downloading problems, we enabled artifact-lock lock
strategy. An annoying problem with the artifact-lock strategy is that the *.lck files which
are created as a lock are not cleaned up if the build exits abruptly. For example, while ivy
is downloading a big jar, if you Ctrl-C to quit that build process. Those lock files will
remain in the metadatas folder. The same happens too if ivy encounters some error and fails
the build.
> Those uncleaned lock files will cause problem when you start the build again. The build
process will hang while ivy waiting those "locks" to be released, which will never happen
automatically. So eventually the build will fail with an ivy error "impossible to acquire
lock for xxxyyyzzzz". What makes it worse is that ivy doesn't fail-fast on the default 2 miuntes
lock timeout, it seems trying it a few times. In worst scenarios, we have seen the build hangs
for 12 minutes and then timeout'd and failed.
> We believe this can be fixed by setting deleteOnExit() for the
class. We have implemented the fix and it works well.
> Patch is provided, could anyone quickly apply this one line change?

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