[Bugs] [Bug 1751722] Gluster fuse mount crashed during truncate

bugzilla at redhat.com bugzilla at redhat.com
Fri Sep 20 17:04:05 UTC 2019


Nir Soffer <nsoffer at redhat.com> changed:

           What    |Removed                     |Added
              Flags|                            |needinfo?(kdhananj at redhat.c
                   |                            |om)

--- Comment #14 from Nir Soffer <nsoffer at redhat.com> ---
Krutika, this makes sense, and explaining the randomness of the failure.

Can you confirm that using a unique file for every host will avoids this

I'm thinking about this flow:

1. Generate random filename e.g ".prob-cacb3ecf-9445-4638-aa00-af0ae99dc09e"
2. Open the prob file with O_WRONLY |O_DIRECT | O_CREAT | O_SYNC | O_EXCL |
3. Delete the file
4. Use the open fd to detect block size

So the probe file can be accessed only from single host, and we never
truncate it.

Do you see issue with gluster in particular when using shard translator?

Does gluster support O_TMPFILE? this will simplify steps 1-3 to:

    fd = open("/mount/path", O_TMPFILE | O_WRONLY | O_EXCL | O_DIRECT);

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