[lustre-discuss] File locking errors.

Prentice Bisbal pbisbal at pppl.gov
Thu Feb 15 12:05:58 PST 2018


No. Several others have asked me the same thing, so that seems like it 
might be the issue. The only problem with that solution is that the user 
claimed his program worked just fine up until a couple of weeks ago, so 
if that is the issue, I'll still be scratching my head trying to figure 
out how/what changed


Prentice

On 02/15/2018 12:31 PM, Alexander I Kulyavtsev wrote:
> 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://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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>

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