[OpenAFS] getcwd() error for RHEL 7.4 kernel
Jason Edgecombe
jwedgeco@uncc.edu
Wed, 15 Nov 2017 13:22:41 -0500
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=E2=80=8BI'm seeing this on some CentOS 7.4 systems that don't have AFS ins=
talled
at all. It tends to happen in SMB network folders.=E2=80=8B
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Jason Edgecombe | Linux Administrator
UNC Charlotte | The William States Lee College of Engineering
9201 University City Blvd. | Charlotte, NC 28223-0001
Phone: 704-687-1943
jwedgeco@uncc.edu | http://engr.uncc.edu | Facebook
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704-687-1943. Thank you.
On Wed, Nov 15, 2017 at 1:02 PM, Matt Vander Werf <mvanderw@nd.edu> wrote:
> Hello,
>
> Are there any updates or progress on a potential fix for this issue?
> Anything we can do to help figure things out?
>
> We are running into more and more users encountering the issue on systems
> we have updated, forcing us to have to downgrade the kernel on them yet a=
s
> well (including the system we were able to reproduce it on and test with
> before). Is there any other information we might provide before we do tha=
t?
>
> Thank you.
>
> --
> Matt Vander Werf
> HPC System Administrator
> University of Notre Dame
> Center for Research Computing - Union Station
> 506 W. South Street
> <https://maps.google.com/?q=3D506+W.+South+Street+South+Bend,+IN+46601&en=
try=3Dgmail&source=3Dg>
> South Bend, IN 46601
> <https://maps.google.com/?q=3D506+W.+South+Street+South+Bend,+IN+46601&en=
try=3Dgmail&source=3Dg>
> Phone: (574) 631-0692
>
> On Wed, Nov 1, 2017 at 1:19 PM, Matt Vander Werf <mvanderw@nd.edu> wrote:
>
>> Thanks for the update!
>>
>> Let us know if there's anything else you need from us. We're happy to
>> test out any potential fixes, if you'd like more testing done.
>>
>> Thanks.
>>
>> --
>> Matt Vander Werf
>> HPC System Administrator
>> University of Notre Dame
>> Center for Research Computing - Union Station
>> 506 W. South Street
>> <https://maps.google.com/?q=3D506+W.+South+Street+South+Bend,+IN+46601&e=
ntry=3Dgmail&source=3Dg>
>> South Bend, IN 46601
>> <https://maps.google.com/?q=3D506+W.+South+Street+South+Bend,+IN+46601&e=
ntry=3Dgmail&source=3Dg>
>> Phone: (574) 631-0692
>>
>> On Mon, Oct 30, 2017 at 11:15 AM, Mark Vitale <mvitale@sinenomine.net>
>> wrote:
>>
>>> Matt,
>>>
>>> > On Oct 28, 2017, at 9:38 AM, Matt Vander Werf <mvanderw@nd.edu> wrote=
:
>>> >
>>> > Attached is the output from running the command 'lsof /afs' after
>>> running both 'echo 2 > /proc/sys/vm/drop_caches' and 'fs flushall' on t=
he
>>> system we're testing with the updated kernel. Is this what you were loo=
king
>>> for? Let me know if you were wanting something different at all.
>>> Thank you for the lsof output, it=E2=80=99s helpful.
>>>
>>> >
>>> > We do still have users actively using AFS on the system in question
>>> (who are not having any issues, as far as we know).
>>> >
>>> > Did the straces I provided help at all? Or did they not give any
>>> useful details?
>>> The straces provided confirmation of the getcwd() ENOENT symptom.
>>>
>>> > Let me know if there=E2=80=99s anything else we can try or any other =
info we
>>> can provide.
>>> I am now able to reproduce the problem at will on my test system, so I
>>> don=E2=80=99t expect I will need anything more from you for now. Thank=
you for all
>>> you provided, and we will keep you informed if there is any progress.
>>>
>>> Regards,
>>> =E2=80=94-
>>> Mark Vitale
>>> OpenAFS release team
>>>
>>
>>
>
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<div dir=3D"ltr"><div class=3D"gmail_default" style=3D"font-family:arial,he=
lvetica,sans-serif">=E2=80=8BI'm seeing this on some CentOS 7.4 systems=
that don't have AFS installed at all. It tends to happen in SMB networ=
k folders.=E2=80=8B</div></div><div class=3D"gmail_extra"><br clear=3D"all"=
><div><div class=3D"gmail_signature" data-smartmail=3D"gmail_signature"><di=
v dir=3D"ltr">-------------------------------------------------------------=
--------------<br>
Jason Edgecombe | Linux Administrator<br>
UNC Charlotte | The William States Lee College of Engineering<br>
9201 University City Blvd. | Charlotte, NC 28223-0001<br>
Phone: <a href=3D"tel:704-687-1943" value=3D"+17046871943" target=3D"_blank=
"><span>704</span>-<span>687</span>-<span>1943</span></a><br>
<a href=3D"mailto:jwedgeco@uncc.edu" target=3D"_blank">jwedgeco@uncc.edu</a=
> | <a href=3D"http://engr.uncc.edu" target=3D"_blank">http://engr.uncc.edu=
</a> | =C2=A0Facebook<br>
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<br>
If you are not the intended recipient of this transmission or a person=20
responsible for delivering it to the intended recipient, any disclosure,
copying, distribution, or other use of any of the information in this=20
transmission is strictly prohibited. If you have received this=20
transmission in error, please notify me immediately by reply e-mail or=20
by telephone at<br>
<a href=3D"tel:704-687-1943" value=3D"+17046871943" target=3D"_blank"><span=
>704</span>-<span>687</span>-<span>1943</span></a>.=C2=A0 Thank you.</div><=
/div></div>
<br><div class=3D"gmail_quote">On Wed, Nov 15, 2017 at 1:02 PM, Matt Vander=
Werf <span dir=3D"ltr"><<a href=3D"mailto:mvanderw@nd.edu" target=3D"_b=
lank">mvanderw@nd.edu</a>></span> wrote:<br><blockquote class=3D"gmail_q=
uote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1e=
x"><div dir=3D"ltr"><div><div>Hello,<br><br></div>Are there any updates or =
progress on a potential fix for this issue? Anything we can do to help figu=
re things out?<br></div><div><br></div><div>We are running into more and mo=
re users encountering the issue on systems we have updated, forcing us to h=
ave to downgrade the kernel on them yet as well (including the system we we=
re able to reproduce it on and test with before). Is there any other inform=
ation we might provide before we do that?<br></div><div><br></div>Thank you=
.<br><div><div class=3D"gmail_extra"><span class=3D""><br clear=3D"all"><di=
v><div class=3D"m_-925149083075608360m_-179848824641958541gmail_signature" =
data-smartmail=3D"gmail_signature"><div dir=3D"ltr"><div>--<br></div><div>M=
att Vander Werf<br>HPC System Administrator<br>University of Notre Dame<br>=
Center for Research Computing - Union Station<br><a href=3D"https://maps.go=
ogle.com/?q=3D506+W.+South+Street+South+Bend,+IN+46601&entry=3Dgmail&am=
p;source=3Dg">506 W. South Street</a><br><a href=3D"https://maps.google.com=
/?q=3D506+W.+South+Street+South+Bend,+IN+46601&entry=3Dgmail&source=
=3Dg">South Bend, IN 46601</a><br></div>Phone: <a href=3D"tel:(574)%20631-0=
692" value=3D"+15746310692" target=3D"_blank">(574) 631-0692</a></div></div=
></div>
<br></span><div><div class=3D"h5"><div class=3D"gmail_quote">On Wed, Nov 1,=
2017 at 1:19 PM, Matt Vander Werf <span dir=3D"ltr"><<a href=3D"mailto:=
mvanderw@nd.edu" target=3D"_blank">mvanderw@nd.edu</a>></span> wrote:<br=
><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1=
px #ccc solid;padding-left:1ex"><div dir=3D"ltr"><div><div>Thanks for the u=
pdate!<br><br></div>Let us know if there's anything else you need from =
us. We're happy to test out any potential fixes, if you'd like more=
testing done.<br></div><div><br></div>Thanks.<br></div><div class=3D"gmail=
_extra"><span><br clear=3D"all"><div><div class=3D"m_-925149083075608360m_-=
179848824641958541m_-5787757725593875639gmail_signature" data-smartmail=3D"=
gmail_signature"><div dir=3D"ltr"><div>--<br></div><div>Matt Vander Werf<br=
>HPC System Administrator<br>University of Notre Dame<br>Center for Researc=
h Computing - Union Station<br><a href=3D"https://maps.google.com/?q=3D506+=
W.+South+Street+South+Bend,+IN+46601&entry=3Dgmail&source=3Dg">506 =
W. South Street</a><br><a href=3D"https://maps.google.com/?q=3D506+W.+South=
+Street+South+Bend,+IN+46601&entry=3Dgmail&source=3Dg">South Bend, =
IN 46601</a><br></div>Phone: <a href=3D"tel:(574)%20631-0692" value=3D"+157=
46310692" target=3D"_blank">(574) 631-0692</a></div></div></div>
<br></span><div><div class=3D"m_-925149083075608360m_-179848824641958541h5"=
><div class=3D"gmail_quote">On Mon, Oct 30, 2017 at 11:15 AM, Mark Vitale <=
span dir=3D"ltr"><<a href=3D"mailto:mvitale@sinenomine.net" target=3D"_b=
lank">mvitale@sinenomine.net</a>></span> wrote:<br><blockquote class=3D"=
gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-=
left:1ex">Matt,<br>
<span><br>
> On Oct 28, 2017, at 9:38 AM, Matt Vander Werf <<a href=3D"mailto:mv=
anderw@nd.edu" target=3D"_blank">mvanderw@nd.edu</a>> wrote:<br>
><br>
> Attached is the output from running the command 'lsof /afs' af=
ter running both 'echo 2 > /proc/sys/vm/drop_caches' and 'fs=
flushall' on the system we're testing with the updated kernel. Is =
this what you were looking for? Let me know if you were wanting something d=
ifferent at all.<br>
</span>Thank you for the lsof output, it=E2=80=99s helpful.<br>
<span><br>
><br>
> We do still have users actively using AFS on the system in question (w=
ho are not having any issues, as far as we know).<br>
><br>
> Did the straces I provided help at all? Or did they not give any usefu=
l details?<br>
</span>The straces provided confirmation of the getcwd() ENOENT symptom.<br=
>
<span><br>
> Let me know if there=E2=80=99s anything else we can try or any other i=
nfo we can provide.<br>
</span>I am now able to reproduce the problem at will on my test system, so=
I don=E2=80=99t expect I will need anything more from you for now.=C2=A0 T=
hank you for all you provided, and we will keep you informed if there is an=
y progress.<br>
<br>
Regards,<br>
=E2=80=94-<br>
<div class=3D"m_-925149083075608360m_-179848824641958541m_-5787757725593875=
639HOEnZb"><div class=3D"m_-925149083075608360m_-179848824641958541m_-57877=
57725593875639h5">Mark Vitale<br>
OpenAFS release team</div></div></blockquote></div><br></div></div></div>
</blockquote></div><br></div></div></div></div></div>
</blockquote></div><br></div>
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