The invalid flag is apparently coming from the intel fortran compiler,
gfortran does not exhibits this in my test. I will the bug in both places.
Thanks.
On 03/17/17 11:43, Joe Julian wrote:
> Would have responded on IRC, but you were already gone.
>
> This is a twofold bug. One, your application should not be using the
> invalid flag, "SEEK_CUR^@^@^@^@^@^@^@^@^@^@^@^@^@". Second, you should
> file this as a bug report for gluster. It should probably fail EINVAL
> that lseek early.
>
>
> On 03/17/17 07:56, Patrice Linel wrote:
>> Hi all,
>>
>> When running a program on a distribute volume with sharding, sometimes
>> the files get created with an extra line of special characters ^@^@^@ at
>> the end. This happen under load with multiple nodes access the same
>> folders with job creating files and reading them very shortly on another
>> node (>0.5 sec later).
>> I did an strace and the major difference is an Inappropriate ioctl
>> followed by an lseek like below.
>>
>>
>> When running the same workload on a panfs filesystem , the strace is the
>> same but no extra line get created at the end.
>>
>>
>> Thanks for any advice on further debugging or resolution on this.
>>
>> Patrice.
>>
>>
>> ioctl(1, SNDCTL_TMR_TIMEBASE or SNDRV_TIMER_IOCTL_NEXT_DEVICE or TCGETS,
>> {B38400 opost isig icanon echo ...}) = 0
>> fstat(1, {st_mode=S_IFCHR|0620, st_rdev=makedev(136, 32), ...}) = 0
>> readlink("/proc/self/fd/1", "/dev/pts/32", 4095) = 11
>> stat("/dev/pts/32", {st_mode=S_IFCHR|0620, st_rdev=makedev(136, 32),
>> ...}) = 0
>> ioctl(1, SNDCTL_TMR_TIMEBASE or SNDRV_TIMER_IOCTL_NEXT_DEVICE or TCGETS,
>> {B38400 opost isig icanon echo ...}) = 0
>> fstat(1, {st_mode=S_IFCHR|0620, st_rdev=makedev(136, 32), ...}) = 0
>> ioctl(1, SNDCTL_TMR_TIMEBASE or SNDRV_TIMER_IOCTL_NEXT_DEVICE or TCGETS,
>> {B38400 opost isig icanon echo ...}) = 0
>> write(1, " Done reading parameter file for"..., 57) = 57
>>
>>
>> VS
>>
>> ioctl(1, SNDCTL_TMR_TIMEBASE or SNDRV_TIMER_IOCTL_NEXT_DEVICE or TCGETS,
>> 0x7fffffff6410) = -1 ENOTTY (Inappropriate ioctl for device)
>> ioctl(1, SNDCTL_TMR_TIMEBASE or SNDRV_TIMER_IOCTL_NEXT_DEVICE or TCGETS,
>> 0x7fffffffa630) = -1 ENOTTY (Inappropriate ioctl for device)
>> fstat(1, {st_mode=S_IFREG|0664, st_size=22753, ...}) = 0
>> ioctl(1, SNDCTL_TMR_TIMEBASE or SNDRV_TIMER_IOCTL_NEXT_DEVICE or TCGETS,
>> 0x7fffffffa630) = -1 ENOTTY (Inappropriate ioctl for device)
>> write(1, " Done reading parameter file for"..., 57 Done reading
>> parameter file for chromosome 7
>> ) = 57
>> lseek(1, 0, SEEK_CUR^@^@^@^@^@^@^@^@^@^@^@^@^@)
>>
>>
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