DL_DIR on nfs mount -> lockfile mayhem

DL_DIR on nfs mount -> lockfile mayhem

[Koen Kooi]

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Hi,

One of my coworkers ran out of diskspace again and decided to move his
DL_DIR to the filer and access it over NFS. Now do_fetch just hangs for
nearly everything and we can get it to continue after removing the
lockfiles in DL_DIR manually, but that's not a good solution.

I don't touch NFS with a bargepole, but my coworker insists it's a valid
use-case :) So, is DL_DIR on nfs supported and if so, any clues why it
could break with lockfiles?

This is with bitbake 1.8 from git.

regards,

Koen
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Re: DL_DIR on nfs mount -> lockfile mayhem

[Richard Purdie]

On Wed, 2010-03-03 at 09:29 +0100, Koen Kooi wrote:
> One of my coworkers ran out of diskspace again and decided to move his
> DL_DIR to the filer and access it over NFS. Now do_fetch just hangs for
> nearly everything and we can get it to continue after removing the
> lockfiles in DL_DIR manually, but that's not a good solution.
> 
> I don't touch NFS with a bargepole, but my coworker insists it's a valid
> use-case :) So, is DL_DIR on nfs supported and if so, any clues why it
> could break with lockfiles?
> 
> This is with bitbake 1.8 from git.

I ran bitbake with DL_DIR on nfs for a long time without issue. I
suspect something in their NFS setup is broken, maybe the part lockfile
handling part (lockd?). Do the syslogs say anything interesting?

Cheers,

Richard

Re: DL_DIR on nfs mount -> lockfile mayhem

[Mike Westerhof]

Koen Kooi wrote:
> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
> 
> Hi,
> 
> One of my coworkers ran out of diskspace again and decided to move his
> DL_DIR to the filer and access it over NFS. Now do_fetch just hangs for
> nearly everything and we can get it to continue after removing the
> lockfiles in DL_DIR manually, but that's not a good solution.
> 
> I don't touch NFS with a bargepole, but my coworker insists it's a valid
> use-case :) So, is DL_DIR on nfs supported and if so, any clues why it
> could break with lockfiles?
> 
> This is with bitbake 1.8 from git.

Works great over NFS; I've used it this way for years now.  There should
be messages in syslog or on the console that might provide a clue.

(But lately I've had reasonably good luck by starting _any_
troubleshooting for odd problems like this by looking at selinux first,
or better yet just turn selinux off and see if whatever strange issue
you have doesn't just go away.)

-Mike (mwester)

Re: DL_DIR on nfs mount -> lockfile mayhem

[Graham Gower]

On 3 March 2010 18:59, Koen Kooi <k.kooi@student.utwente.nl> wrote:
> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
>
> Hi,
>
> One of my coworkers ran out of diskspace again and decided to move his
> DL_DIR to the filer and access it over NFS. Now do_fetch just hangs for
> nearly everything and we can get it to continue after removing the
> lockfiles in DL_DIR manually, but that's not a good solution.
>
> I don't touch NFS with a bargepole, but my coworker insists it's a valid
> use-case :) So, is DL_DIR on nfs supported and if so, any clues why it
> could break with lockfiles?
>
> This is with bitbake 1.8 from git.
>
> regards,
>
> Koen
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> Version: GnuPG v1.4.5 (Darwin)
>
> iD8DBQFLjh3kMkyGM64RGpERAqZ0AJ9JlIjYNNApPue9ik+LsH4HBF1ACACfWsEi
> CC1SVf3BR0QtLsMyOakTKA0=
> =lGCK
> -----END PGP SIGNATURE-----
>
>
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What is the nfs server running and what are your mount options? I've
seen odd behaviour with applications using sqlite (e.g. firefox) on
some nfs mounts: http://www.sqlite.org/faq.html#q5

Does the problem go away when the filesystem is mounted -onolock ?

-Graham