[lustre-discuss] File locking errors.

[Alexander I Kulyavtsev]

Do you have flock option in fstab for lustre mount or in command you use to mount lustre on client?

Search for flock on lustre wiki
http://wiki.lustre.org/Mounting_a_Lustre_File_System_on_Client_Nodes
or lustre manual
http://doc.lustre.org/lustre_manual.pdf

Here are links where to start learning about lustre:
* http://lustre.org/getting-started-with-lustre/
* http://wiki.lustre.org
* https://wiki.hpdd.intel.com
* jira.hpdd.intel.com<http://jira.hpdd.intel.com>
* http://opensfs.org/lustre/

Alex.

On Feb 15, 2018, at 11:02 AM, Prentice Bisbal <pbisbal at pppl.gov<mailto:pbisbal at pppl.gov>> wrote:

Hi.

I'm an experience HPC system admin, but I know almost nothing about Lustre administration. The system admin who administered our small Lustre filesystem recently retired, and no one has filled that gap yet. A user recently reported they are now getting file-locking errors from a program they've run repeatedly on Lustre in the past. When the run the same program on an NFS filesystem, the error goes away. I've cut-and-pasted the error messages below.

Since I have real experience as a Lustre admin, I turned to google, and it looks like it might be that the file-locking daemon died (if Lustre has a separate file-lock daemon), or somehow file-locking was recently disabled. If that is possible, how do I check this, and restart or re-enable if necessary?  I skimmed the user manual, and could not find anything on either of these issues.

Any and all help will be greatly appreciated.

Some of the error messages:

HDF5-DIAG: Error detected in HDF5 (1.10.0-patch1) MPI-process 9:
  #000: H5F.c line 579 in H5Fopen(): unable to open file
    major: File accessibilty
    minor: Unable to open file
  #001: H5Fint.c line 1168 in H5F_open(): unable to lock the file or initialize file structure
    major: File accessibilty
    minor: Unable to open file
  #002: H5FD.c line 1821 in H5FD_lock(): driver lock request failed
    major: Virtual File Layer
    minor: Can't update object
  #003: H5FDsec2.c line 939 in H5FD_sec2_lock(): unable to flock file, errno = 38, error message = 'Function not implemented'
    major: File accessibilty
    minor: Bad file ID accessed
Error: couldn't open file HDF5-DIAG: Error detected in HDF5 (1.10.0-patch1) MPI-process 13:
  #000: H5F.c line 579 in H5Fopen(): unable to open file
    major: File accessibilty
    minor: Unable to open file
  #001: H5Fint.c line 1168 in H5F_open(): unable to lock the file or initialize file structure
    major: File accessibilty
    minor: Unable to open file
  #002: H5FD.c line 1821 in H5FD_lock(): driver lock request failed
    major: Virtual File Layer
    minor: Can't update object
  #003: H5FDsec2.c line 939 in H5FD_sec2_lock(): unable to flock file, errno = 38, error message = 'Function not implemented'
    major: File accessibilty
    minor: Bad file ID accessed

--
Prentice

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