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Every 3 seconds implies, to me, that it's trying to reconnect to a
server.<br>
<br>
<div class="moz-cite-prefix">On 03/26/2015 01:12 PM, Jonathan Heese
wrote:<br>
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<div style="font-size:12pt; color:#000000;
background-color:#FFFFFF;
font-family:Calibri,Arial,Helvetica,sans-serif">
<p>Joe,</p>
<p><br>
</p>
<p>Hmmm.... But every 3 seconds for all eternity? Seems a bit
much for a "warning", doesn't it?</p>
<p><br>
</p>
<p>Did you see my last reply? My <span dir="ltr"><font
color="black" face="Calibri,Arial,Helvetica,sans-serif"
size="3"><span
style="font-size:12pt;background-color:white;">nfs-server.vol</span></font></span>
file seems to indicate that RDMA is still in use in some
capacity... Is this normal? If not, how can I reconcile
this?</p>
<p><br>
</p>
<p>Thanks.</p>
<p><br>
</p>
<p>Regards,</p>
<p>Jon Heese<br>
</p>
<p><br>
</p>
<div style="color:rgb(40,40,40)">
<hr tabindex="-1" style="display:inline-block; width:98%">
<div id="divRplyFwdMsg" dir="ltr"><font
style="font-size:11pt" color="#000000" face="Calibri,
sans-serif"><b>From:</b>
<a class="moz-txt-link-abbreviated" href="mailto:gluster-users-bounces@gluster.org">gluster-users-bounces@gluster.org</a>
<a class="moz-txt-link-rfc2396E" href="mailto:gluster-users-bounces@gluster.org"><gluster-users-bounces@gluster.org></a> on behalf of
Joe Julian <a class="moz-txt-link-rfc2396E" href="mailto:joe@julianfamily.org"><joe@julianfamily.org></a><br>
<b>Sent:</b> Thursday, March 26, 2015 4:08 PM<br>
<b>To:</b> <a class="moz-txt-link-abbreviated" href="mailto:gluster-users@gluster.org">gluster-users@gluster.org</a><br>
<b>Subject:</b> Re: [Gluster-users] I/O error on
replicated volume</font>
<div> </div>
</div>
<div>The RDMA warnings are not relevant if you don't use
RDMA. It's simply pointing out that it tried to register
and it couldn't, which would be expected if your system
doesn't support it.<br>
<br>
<div class="moz-cite-prefix">On 03/23/2015 12:29 AM,
Mohammed Rafi K C wrote:<br>
</div>
<blockquote type="cite"><br>
<div class="moz-cite-prefix">On 03/23/2015 11:28 AM,
Jonathan Heese wrote:<br>
</div>
<blockquote type="cite">
<div>On Mar 23, 2015, at 1:20 AM, "Mohammed Rafi K C"
<<a moz-do-not-send="true"
href="mailto:rkavunga@redhat.com">rkavunga@redhat.com</a>>
wrote:<br>
<br>
</div>
<blockquote type="cite">
<div><br>
<div class="moz-cite-prefix">On 03/21/2015 07:49
PM, Jonathan Heese wrote:<br>
</div>
<blockquote type="cite">
<div style="font-size:12pt; color:#000000;
background-color:#FFFFFF;
font-family:Calibri,Arial,Helvetica,sans-serif">
<p>Mohamed,</p>
<p><br>
</p>
<p>I have completed the steps you suggested
(unmount all, stop the volume, set the
config.transport to tcp, start the volume,
mount, etc.), and the behavior has indeed
changed.</p>
<p><br>
</p>
<p>[root@duke ~]# gluster volume info<br>
<br>
Volume Name: gluster_disk<br>
Type: Replicate<br>
Volume ID:
2307a5a8-641e-44f4-8eaf-7cc2b704aafd<br>
Status: Started<br>
Number of Bricks: 1 x 2 = 2<br>
Transport-type: tcp<br>
Bricks:<br>
Brick1: duke-ib:/bricks/brick1<br>
Brick2: duchess-ib:/bricks/brick1<br>
Options Reconfigured:<br>
config.transport: tcp</p>
<p><br>
[root@duke ~]# gluster volume status<br>
Status of volume: gluster_disk<br>
Gluster
process
Port Online Pid<br>
------------------------------------------------------------------------------<br>
Brick
duke-ib:/bricks/brick1
49152 Y 16362<br>
Brick
duchess-ib:/bricks/brick1
49152 Y 14155<br>
NFS Server on
localhost
2049 Y 16374<br>
Self-heal Daemon on
localhost N/A
Y 16381<br>
NFS Server on
duchess-ib
2049 Y 14167<br>
Self-heal Daemon on
duchess-ib N/A
Y 14174<br>
<br>
Task Status of Volume gluster_disk<br>
------------------------------------------------------------------------------<br>
There are no active volume tasks<br>
<br>
</p>
<p>I am no longer seeing the I/O errors during
prolonged periods of write I/O that I was
seeing when the transport was set to rdma.
However, I am seeing this message on both
nodes every 3 seconds (almost exactly):</p>
<p><br>
</p>
<p>==> /var/log/glusterfs/nfs.log <==<br>
[2015-03-21 14:17:40.379719] W
[rdma.c:1076:gf_rdma_cm_event_handler]
0-gluster_disk-client-1: cma event
RDMA_CM_EVENT_REJECTED, error 8
(me:10.10.10.1:1023 peer:10.10.10.2:49152)<br>
</p>
<p><br>
</p>
<p>Is this something to worry about? </p>
</div>
</blockquote>
If you are not using nfs to export the volumes,
there is nothing to worry. <br>
</div>
</blockquote>
<div><br>
</div>
I'm using the native glusterfs FUSE component to mount
the volume locally on both servers -- I assume that
you're referring to the standard NFS protocol stuff,
which I'm not using here.
<div><br>
</div>
<div>Incidentally, I would like to keep my logs from
filling up with junk if possible. Is there
something I can do to get rid of these (useless?)
error messages?<br>
</div>
</blockquote>
<br>
If i understand correctly, you are getting this enormous
log message from nfs log only, all other logs and
everything are fine now, right ? If that is the case,
and you are not at all using nfs for exporting the
volume, as a workaround you can disable nfs for your
volume or cluster. (gluster v set nfs.disable on). This
will turnoff your gluster nfs server, and you will no
longer get those log messages.<br>
<br>
<br>
<blockquote type="cite">
<div>
<div>
<blockquote type="cite">
<div>
<blockquote type="cite">
<div style="font-size:12pt; color:#000000;
background-color:#FFFFFF;
font-family:Calibri,Arial,Helvetica,sans-serif">
<p>Any idea why there are rdma pieces in
play when I've set my transport to tcp?</p>
</div>
</blockquote>
<br>
there should not be any piece of rdma,if
possible, can you paste the volfile for nfs
server. You can find the volfile in
/var/lib/glusterd/nfs/nfs-server.vol or
/usr/local/var/lib/glusterd/nfs/nfs-server.vol<br>
</div>
</blockquote>
<div><br>
</div>
<div>I will get this for you when I can. Thanks.</div>
</div>
</div>
</blockquote>
<br>
If you can make it, that will be great help to
understand the problem.<br>
<br>
<br>
Rafi KC<br>
<br>
<blockquote type="cite">
<div>
<div>
<div><br>
</div>
<div>Regards,</div>
<div>Jon Heese</div>
<br>
<blockquote type="cite">
<div>Rafi KC<br>
<blockquote type="cite">
<div style="font-size:12pt; color:#000000;
background-color:#FFFFFF;
font-family:Calibri,Arial,Helvetica,sans-serif">
<p>The actual I/O appears to be handled
properly and I've seen no further errors
in the testing I've done so far.</p>
<p><br>
</p>
<p>Thanks.<br>
</p>
<p><br>
</p>
<p>Regards,</p>
<p>Jon Heese</p>
<p><br>
</p>
<div dir="auto"
style="color:rgb(40,40,40)">
<hr tabindex="-1"
style="display:inline-block;
width:98%">
<div id="divRplyFwdMsg" dir="ltr"><font
style="font-size:11pt"
color="#000000" face="Calibri,
sans-serif"><b>From:</b>
<a moz-do-not-send="true"
class="moz-txt-link-abbreviated"
href="mailto:gluster-users-bounces@gluster.org">
gluster-users-bounces@gluster.org</a>
<a moz-do-not-send="true"
class="moz-txt-link-rfc2396E"
href="mailto:gluster-users-bounces@gluster.org">
<gluster-users-bounces@gluster.org></a> on behalf of Jonathan
Heese <a moz-do-not-send="true"
class="moz-txt-link-rfc2396E"
href="mailto:jheese@inetu.net">
<jheese@inetu.net></a><br>
<b>Sent:</b> Friday, March 20, 2015
7:04 AM<br>
<b>To:</b> Mohammed Rafi K C<br>
<b>Cc:</b> gluster-users<br>
<b>Subject:</b> Re: [Gluster-users]
I/O error on replicated volume</font>
<div> </div>
</div>
<div>
<div>Mohammed,</div>
<div><br>
</div>
<div>Thanks very much for the reply.
I will try that and report back.<br>
<br>
Regards,
<div>Jon Heese</div>
</div>
<div><br>
On Mar 20, 2015, at 3:26 AM,
"Mohammed Rafi K C" <<a
moz-do-not-send="true"
href="mailto:rkavunga@redhat.com">rkavunga@redhat.com</a>>
wrote:<br>
<br>
</div>
<blockquote type="cite">
<div><br>
<div class="moz-cite-prefix">On
03/19/2015 10:16 PM, Jonathan
Heese wrote:<br>
</div>
<blockquote type="cite">
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<p class="MsoNormal"><a
moz-do-not-send="true"
name="_MailEndCompose"><span
style="color:#1F497D">Hello
all,</span></a></p>
<p class="MsoNormal"><span
style="color:#1F497D"> </span></p>
<p class="MsoNormal"><span
style="color:#1F497D">Does
anyone else have any
further suggestions for
troubleshooting this?</span></p>
<p class="MsoNormal"><span
style="color:#1F497D"> </span></p>
<p class="MsoNormal"><span
style="color:#1F497D">To
sum up: I have a 2 node 2
brick replicated volume,
which holds a handful of
iSCSI image files which
are mounted and served up
by tgtd (CentOS 6) to a
handful of devices on a
dedicated iSCSI network.
The most important iSCSI
clients (initiators) are
four VMware ESXi 5.5 hosts
that use the iSCSI volumes
as backing for their
datastores for virtual
machine storage.</span></p>
<p class="MsoNormal"><span
style="color:#1F497D"> </span></p>
<p class="MsoNormal"><span
style="color:#1F497D">After
a few minutes of sustained
writing to the volume, I
am seeing a massive flood
(over 1500 per second at
times) of this error in
/var/log/glusterfs/mnt-gluster-disk.log:</span></p>
<p class="MsoNormal"><span
style="color:#1F497D">[2015-03-16
02:24:07.582801] W
[fuse-bridge.c:2242:fuse_writev_cbk]
0-glusterfs-fuse: 635358:
WRITE => -1
(Input/output error)</span></p>
<p class="MsoNormal"><span
style="color:#1F497D"> </span></p>
<p class="MsoNormal"><span
style="color:#1F497D">When
this happens, the ESXi box
fails its write operation
and returns an error to
the effect of “Unable to
write data to datastore”.
I don’t see anything else
in the supporting logs to
explain the root cause of
the i/o errors.</span></p>
<p class="MsoNormal"><span
style="color:#1F497D"> </span></p>
<p class="MsoNormal"><span
style="color:#1F497D">Any
and all suggestions are
appreciated. Thanks.</span></p>
<p class="MsoNormal"><span
style="color:#1F497D"> </span></p>
</div>
</blockquote>
<br>
From the mount logs, i assume that
your volume transport type is
rdma. There are some known issues
for rdma in 3.5.3, and the patch
for to address those issues are
already send to upstream [1]. From
the logs, I'm not sure and it is
hard to tell you whether this
problem is something related to
rdma transport or not. To make
sure that the tcp transport is
works well in this scenario, if
possible can you try to reproduce
the same using tcp type volumes.
You can change the transport type
of volume by doing the following
step ( not recommended in normal
use case).<br>
<br>
1) unmount every client<br>
2) stop the volume<br>
3) run gluster volume set volname
config.transport tcp<br>
4) start the volume again<br>
5) mount the clients<br>
<br>
[1] : <a moz-do-not-send="true"
class="moz-txt-link-freetext"
href="http://goo.gl/2PTL61">http://goo.gl/2PTL61</a><br>
<br>
Regards<br>
Rafi KC<br>
<br>
<blockquote type="cite">
<div class="WordSection1">
<div>
<p class="MsoNormal"
style=""><i><span
style="font-size:16.0pt;
font-family:"Georgia",serif;
color:#0F5789">Jon
Heese</span></i><span
style=""><br>
</span><i><span
style="color:#333333">Systems
Engineer</span></i><span
style=""><br>
</span><b><span
style="color:#333333">INetU
Managed Hosting</span></b><span
style=""><br>
</span><span
style="color:#333333">P:
610.266.7441 x 261</span><span
style=""><br>
</span><span
style="color:#333333">F:
610.266.7434</span><span
style=""><br>
</span><a
moz-do-not-send="true"
href="https://www.inetu.net/"><span
style="color:blue">www.inetu.net</span></a><span
style=""></span></p>
<p class="MsoNormal"><i><span
style="font-size:8.0pt;
color:#333333">** This
message contains
confidential
information, which
also may be
privileged, and is
intended only for the
person(s) addressed
above. Any
unauthorized use,
distribution, copying
or disclosure of
confidential and/or
privileged information
is strictly
prohibited. If you
have received this
communication in
error, please erase
all copies of the
message and its
attachments and notify
the sender immediately
via reply e-mail. **</span></i><span
style="color:#1F497D"></span></p>
</div>
<p class="MsoNormal"><span
style="color:#1F497D"> </span></p>
<div>
<div style="border:none;
border-top:solid #E1E1E1
1.0pt; padding:3.0pt 0in
0in 0in">
<p class="MsoNormal"><b><span
style="color:windowtext">From:</span></b><span style="color:windowtext">
Jonathan Heese
<br>
<b>Sent:</b> Tuesday,
March 17, 2015 12:36
PM<br>
<b>To:</b>
'Ravishankar N'; <a
moz-do-not-send="true"
class="moz-txt-link-abbreviated" href="mailto:gluster-users@gluster.org">
gluster-users@gluster.org</a><br>
<b>Subject:</b> RE:
[Gluster-users] I/O
error on replicated
volume</span></p>
</div>
</div>
<p class="MsoNormal"> </p>
<p class="MsoNormal"><span
style="color:#1F497D">Ravi,</span></p>
<p class="MsoNormal"><span
style="color:#1F497D"> </span></p>
<p class="MsoNormal"><span
style="color:#1F497D">The
last lines in the mount
log before the massive
vomit of I/O errors are
from 22 minutes prior, and
seem innocuous to me:</span></p>
<p class="MsoNormal"><span
style="color:#1F497D"> </span></p>
<p class="MsoNormal"><span
style="color:#1F497D">[2015-03-16
01:37:07.126340] E
[client-handshake.c:1760:client_query_portmap_cbk]
0-gluster_disk-client-0:
failed to get the port
number for remote
subvolume. Please run
'gluster volume status' on
server to see if brick
process is running.</span></p>
<p class="MsoNormal"><span
style="color:#1F497D">[2015-03-16
01:37:07.126587] W
[rdma.c:4273:gf_rdma_disconnect]
(-->/usr/lib64/libgfrpc.so.0(rpc_clnt_notify+0x13f)
[0x7fd9c557bccf]
(-->/usr/lib64/libgfrpc.so.0(rpc_clnt_handle_reply+0xa5)
[0x7fd9c557a995]
(-->/usr/lib64/glusterfs/3.5.3/xlator/protocol/client.so(client_query_portmap_cbk+0x1ea)
[0x7fd9c0d8fb9a])))
0-gluster_disk-client-0:
disconnect called
(peer:10.10.10.1:24008)</span></p>
<p class="MsoNormal"><span
style="color:#1F497D">[2015-03-16
01:37:07.126687] E
[client-handshake.c:1760:client_query_portmap_cbk]
0-gluster_disk-client-1:
failed to get the port
number for remote
subvolume. Please run
'gluster volume status' on
server to see if brick
process is running.</span></p>
<p class="MsoNormal"><span
style="color:#1F497D">[2015-03-16
01:37:07.126737] W
[rdma.c:4273:gf_rdma_disconnect]
(-->/usr/lib64/libgfrpc.so.0(rpc_clnt_notify+0x13f)
[0x7fd9c557bccf]
(-->/usr/lib64/libgfrpc.so.0(rpc_clnt_handle_reply+0xa5)
[0x7fd9c557a995]
(-->/usr/lib64/glusterfs/3.5.3/xlator/protocol/client.so(client_query_portmap_cbk+0x1ea)
[0x7fd9c0d8fb9a])))
0-gluster_disk-client-1:
disconnect called
(peer:10.10.10.2:24008)</span></p>
<p class="MsoNormal"><span
style="color:#1F497D">[2015-03-16
01:37:10.730165] I
[rpc-clnt.c:1729:rpc_clnt_reconfig]
0-gluster_disk-client-0:
changing port to 49152
(from 0)</span></p>
<p class="MsoNormal"><span
style="color:#1F497D">[2015-03-16
01:37:10.730276] W
[rdma.c:4273:gf_rdma_disconnect]
(-->/usr/lib64/libgfrpc.so.0(rpc_clnt_notify+0x13f)
[0x7fd9c557bccf]
(-->/usr/lib64/libgfrpc.so.0(rpc_clnt_handle_reply+0xa5)
[0x7fd9c557a995]
(-->/usr/lib64/glusterfs/3.5.3/xlator/protocol/client.so(client_query_portmap_cbk+0x1ea)
[0x7fd9c0d8fb9a])))
0-gluster_disk-client-0:
disconnect called
(peer:10.10.10.1:24008)</span></p>
<p class="MsoNormal"><span
style="color:#1F497D">[2015-03-16
01:37:10.739500] I
[rpc-clnt.c:1729:rpc_clnt_reconfig]
0-gluster_disk-client-1:
changing port to 49152
(from 0)</span></p>
<p class="MsoNormal"><span
style="color:#1F497D">[2015-03-16
01:37:10.739560] W
[rdma.c:4273:gf_rdma_disconnect]
(-->/usr/lib64/libgfrpc.so.0(rpc_clnt_notify+0x13f)
[0x7fd9c557bccf]
(-->/usr/lib64/libgfrpc.so.0(rpc_clnt_handle_reply+0xa5)
[0x7fd9c557a995]
(-->/usr/lib64/glusterfs/3.5.3/xlator/protocol/client.so(client_query_portmap_cbk+0x1ea)
[0x7fd9c0d8fb9a])))
0-gluster_disk-client-1:
disconnect called
(peer:10.10.10.2:24008)</span></p>
<p class="MsoNormal"><span
style="color:#1F497D">[2015-03-16
01:37:10.741883] I
[client-handshake.c:1677:select_server_supported_programs]
0-gluster_disk-client-0:
Using Program GlusterFS
3.3, Num (1298437),
Version (330)</span></p>
<p class="MsoNormal"><span
style="color:#1F497D">[2015-03-16
01:37:10.744524] I
[client-handshake.c:1462:client_setvolume_cbk]
0-gluster_disk-client-0:
Connected to
10.10.10.1:49152, attached
to remote volume
'/bricks/brick1'.</span></p>
<p class="MsoNormal"><span
style="color:#1F497D">[2015-03-16
01:37:10.744537] I
[client-handshake.c:1474:client_setvolume_cbk]
0-gluster_disk-client-0:
Server and Client
lk-version numbers are not
same, reopening the fds</span></p>
<p class="MsoNormal"><span
style="color:#1F497D">[2015-03-16
01:37:10.744566] I
[afr-common.c:4267:afr_notify]
0-gluster_disk-replicate-0:
Subvolume
'gluster_disk-client-0'
came back up; going
online.</span></p>
<p class="MsoNormal"><span
style="color:#1F497D">[2015-03-16
01:37:10.744627] I
[client-handshake.c:450:client_set_lk_version_cbk]
0-gluster_disk-client-0:
Server lk version = 1</span></p>
<p class="MsoNormal"><span
style="color:#1F497D">[2015-03-16
01:37:10.753037] I
[client-handshake.c:1677:select_server_supported_programs]
0-gluster_disk-client-1:
Using Program GlusterFS
3.3, Num (1298437),
Version (330)</span></p>
<p class="MsoNormal"><span
style="color:#1F497D">[2015-03-16
01:37:10.755657] I
[client-handshake.c:1462:client_setvolume_cbk]
0-gluster_disk-client-1:
Connected to
10.10.10.2:49152, attached
to remote volume
'/bricks/brick1'.</span></p>
<p class="MsoNormal"><span
style="color:#1F497D">[2015-03-16
01:37:10.755676] I
[client-handshake.c:1474:client_setvolume_cbk]
0-gluster_disk-client-1:
Server and Client
lk-version numbers are not
same, reopening the fds</span></p>
<p class="MsoNormal"><span
style="color:#1F497D">[2015-03-16
01:37:10.761945] I
[fuse-bridge.c:5016:fuse_graph_setup]
0-fuse: switched to graph
0</span></p>
<p class="MsoNormal"><span
style="color:#1F497D">[2015-03-16
01:37:10.762144] I
[client-handshake.c:450:client_set_lk_version_cbk]
0-gluster_disk-client-1:
Server lk version = 1</span></p>
<p class="MsoNormal"><span
style="color:#1F497D">[<b>2015-03-16
01:37:10.762279</b>] I
[fuse-bridge.c:3953:fuse_init]
0-glusterfs-fuse: FUSE
inited with protocol
versions: glusterfs 7.22
kernel 7.14</span></p>
<p class="MsoNormal"><span
style="color:#1F497D">[<b>2015-03-16
01:59:26.098670</b>] W
[fuse-bridge.c:2242:fuse_writev_cbk]
0-glusterfs-fuse: 292084:
WRITE => -1
(Input/output error)</span></p>
<p class="MsoNormal"><span
style="color:#1F497D">…</span></p>
<p class="MsoNormal"><span
style="color:#1F497D"> </span></p>
<p class="MsoNormal"><span
style="color:#1F497D">I’ve
seen no indication of
split-brain on any files
at any point in this (ever
since downdating from
3.6.2 to 3.5.3, which is
when this particular issue
started):</span></p>
<p class="MsoNormal"><span
style="color:#1F497D">[root@duke
gfapi-module-for-linux-target-driver-]#
gluster v heal
gluster_disk info</span></p>
<p class="MsoNormal"><span
style="color:#1F497D">Brick
duke.jonheese.local:/bricks/brick1/</span></p>
<p class="MsoNormal"><span
style="color:#1F497D">Number
of entries: 0</span></p>
<p class="MsoNormal"><span
style="color:#1F497D"> </span></p>
<p class="MsoNormal"><span
style="color:#1F497D">Brick
duchess.jonheese.local:/bricks/brick1/</span></p>
<p class="MsoNormal"><span
style="color:#1F497D">Number
of entries: 0</span></p>
<p class="MsoNormal"><span
style="color:#1F497D"> </span></p>
<p class="MsoNormal"><span
style="color:#1F497D">Thanks.</span></p>
<p class="MsoNormal"><span
style="color:#1F497D"> </span></p>
<div>
<p class="MsoNormal"
style=""><i><span
style="font-size:16.0pt;
font-family:"Georgia",serif;
color:#0F5789">Jon
Heese</span></i><span
style=""><br>
</span><i><span
style="color:#333333">Systems
Engineer</span></i><span
style=""><br>
</span><b><span
style="color:#333333">INetU
Managed Hosting</span></b><span
style=""><br>
</span><span
style="color:#333333">P:
610.266.7441 x 261</span><span
style=""><br>
</span><span
style="color:#333333">F:
610.266.7434</span><span
style=""><br>
</span><a
moz-do-not-send="true"
href="https://www.inetu.net/"><span
style="color:blue">www.inetu.net</span></a><span
style=""></span></p>
<p class="MsoNormal"><i><span
style="font-size:8.0pt;
color:#333333">** This
message contains
confidential
information, which
also may be
privileged, and is
intended only for the
person(s) addressed
above. Any
unauthorized use,
distribution, copying
or disclosure of
confidential and/or
privileged information
is strictly
prohibited. If you
have received this
communication in
error, please erase
all copies of the
message and its
attachments and notify
the sender immediately
via reply e-mail. **</span></i><span
style="color:#1F497D"></span></p>
</div>
<p class="MsoNormal"><span
style="color:#1F497D"> </span></p>
<div>
<div style="border:none;
border-top:solid #E1E1E1
1.0pt; padding:3.0pt 0in
0in 0in">
<p class="MsoNormal"><b><span
style="color:windowtext">From:</span></b><span style="color:windowtext">
Ravishankar N [</span><a
moz-do-not-send="true"
href="mailto:ravishankar@redhat.com">mailto:ravishankar@redhat.com</a><span
style="color:windowtext">]
<br>
<b>Sent:</b> Tuesday,
March 17, 2015 12:35
AM<br>
<b>To:</b> Jonathan
Heese; </span><a
moz-do-not-send="true"
href="mailto:gluster-users@gluster.org">gluster-users@gluster.org</a><span
style="color:windowtext"><br>
<b>Subject:</b> Re:
[Gluster-users] I/O
error on replicated
volume</span></p>
</div>
</div>
<p class="MsoNormal"> </p>
<p class="MsoNormal"><span
style="font-size:12.0pt"> </span></p>
<div>
<p class="MsoNormal">On
03/17/2015 02:14 AM,
Jonathan Heese wrote:</p>
</div>
<blockquote
style="margin-top:5.0pt;
margin-bottom:5.0pt">
<div>
<div>
<p class="MsoNormal"
style="background:white"><span
style="font-size:12.0pt">Hello,<br>
<br>
So I resolved my
previous issue with
split-brains and the
lack of self-healing
by dropping my
installed glusterfs*
packages from 3.6.2
to 3.5.3, but now
I've picked up a new
issue, which
actually makes
normal use of the
volume practically
impossible.<br>
<br>
A little background
for those not
already paying close
attention:<br>
I have a 2 node 2
brick replicating
volume whose purpose
in life is to hold
iSCSI target files,
primarily for use to
provide datastores
to a VMware ESXi
cluster. The plan
is to put a handful
of image files on
the Gluster volume,
mount them locally
on both Gluster
nodes, and run tgtd
on both, pointed to
the image files on
the mounted gluster
volume. Then the
ESXi boxes will use
multipath
(active/passive)
iSCSI to connect
to the nodes, with
automatic failover
in case of planned
or unplanned
downtime of the
Gluster nodes.<br>
<br>
In my most recent
round of testing
with 3.5.3, I'm
seeing a massive
failure to write
data to the volume
after about 5-10
minutes, so I've
simplified the
scenario a bit (to
minimize the
variables) to: both
Gluster nodes up,
only one node (duke)
mounted and running
tgtd, and just
regular (single
path) iSCSI from a
single ESXi server.<br>
<br>
About 5-10 minutes
into migration a VM
onto the test
datastore,
/var/log/messages on
duke gets blasted
with a ton of
messages exactly
like this:</span></p>
<p class="MsoNormal"
style="background:white">Mar
15 22:24:06 duke tgtd:
bs_rdwr_request(180)
io error 0x1781e00 2a
-1 512 22971904,
Input/output error</p>
<p class="MsoNormal"
style="background:white"> </p>
<p class="MsoNormal"
style="background:white">And
/var/log/glusterfs/mnt-gluster_disk.log
gets blased with a ton
of messages exactly
like this:</p>
<p class="MsoNormal"
style="background:white">[2015-03-16
02:24:07.572279] W
[fuse-bridge.c:2242:fuse_writev_cbk]
0-glusterfs-fuse:
635299: WRITE => -1
(Input/output error)</p>
<p class="MsoNormal"
style="background:white"> </p>
</div>
</div>
</blockquote>
<p class="MsoNormal"
style="margin-bottom:12.0pt"><span
style=""><br>
Are there any messages in
the mount log from AFR
about split-brain just
before the above line
appears?<br>
Does `gluster v heal
<VOLNAME> info` show
any files? Performing I/O
on files that are in
split-brain fail with EIO.<br>
<br>
-Ravi<br>
<br>
</span></p>
<blockquote
style="margin-top:5.0pt;
margin-bottom:5.0pt">
<div>
<div>
<p class="MsoNormal"
style="background:white">And
the write operation
from VMware's side
fails as soon as these
messages start.</p>
<p class="MsoNormal"
style="background:white"> </p>
<p class="MsoNormal"
style="background:white">I
don't see any other
errors (in the log
files I know of)
indicating the root
cause of these i/o
errors. I'm sure that
this is not enough
information to tell
what's going on, but
can anyone help me
figure out what to
look at next to figure
this out?</p>
<p class="MsoNormal"
style="background:white"> </p>
<p class="MsoNormal"
style="background:white">I've
also considered using
Dan Lambright's
libgfapi gluster
module for tgtd (or
something similar) to
avoid going through
FUSE, but I'm not sure
whether that would be
irrelevant to this
problem, since I'm not
100% sure if it lies
in FUSE or elsewhere.</p>
<p class="MsoNormal"
style="background:white"> </p>
<p class="MsoNormal"
style="background:white">Thanks!</p>
<p class="MsoNormal"
style="background:white"> </p>
<p class="MsoNormal"
style="background:white"><i><span
style="font-size:16.0pt;
font-family:"Georgia",serif;
color:#0F5789">Jon
Heese</span></i><span
style=""><br>
</span><i><span
style="color:#333333">Systems
Engineer</span></i><span
style=""><br>
</span><b><span
style="color:#333333">INetU
Managed Hosting</span></b><span
style=""><br>
</span><span
style="color:#333333">P:
610.266.7441 x 261</span><span
style=""><br>
</span><span
style="color:#333333">F:
610.266.7434</span><span
style=""><br>
</span><a
moz-do-not-send="true"
href="https://www.inetu.net/"><span style="color:blue">www.inetu.net</span></a></p>
<p class="MsoNormal"
style="background:white"><i><span
style="font-size:8.0pt;
color:#333333">**
This message
contains
confidential
information, which
also may be
privileged, and is
intended only for
the person(s)
addressed above.
Any unauthorized
use, distribution,
copying or
disclosure of
confidential
and/or privileged
information is
strictly
prohibited. If you
have received this
communication in
error, please
erase all copies
of the message and
its attachments
and notify the
sender immediately
via reply e-mail.
**</span></i></p>
<p class="MsoNormal"
style="background:white"> </p>
</div>
</div>
<p class="MsoNormal"
style="margin-bottom:12.0pt"><span
style=""><br>
<br>
</span></p>
<pre>_______________________________________________</pre>
<pre>Gluster-users mailing list</pre>
<pre><a moz-do-not-send="true" href="mailto:Gluster-users@gluster.org">Gluster-users@gluster.org</a></pre>
<pre><a moz-do-not-send="true" href="http://www.gluster.org/mailman/listinfo/gluster-users">http://www.gluster.org/mailman/listinfo/gluster-users</a></pre>
</blockquote>
<p class="MsoNormal"><span
style=""> </span></p>
</div>
<br>
<fieldset
class="mimeAttachmentHeader"></fieldset>
<br>
<pre>_______________________________________________
Gluster-users mailing list
<a moz-do-not-send="true" class="moz-txt-link-abbreviated" href="mailto:Gluster-users@gluster.org">Gluster-users@gluster.org</a>
<a moz-do-not-send="true" class="moz-txt-link-freetext" href="http://www.gluster.org/mailman/listinfo/gluster-users">http://www.gluster.org/mailman/listinfo/gluster-users</a></pre>
</blockquote>
<br>
</div>
</blockquote>
</div>
</div>
</div>
</blockquote>
<br>
</div>
</blockquote>
</div>
</div>
</blockquote>
<br>
<br>
<fieldset class="mimeAttachmentHeader"></fieldset>
<br>
<pre>_______________________________________________
Gluster-users mailing list
<a moz-do-not-send="true" class="moz-txt-link-abbreviated" href="mailto:Gluster-users@gluster.org">Gluster-users@gluster.org</a>
<a moz-do-not-send="true" class="moz-txt-link-freetext" href="http://www.gluster.org/mailman/listinfo/gluster-users">http://www.gluster.org/mailman/listinfo/gluster-users</a></pre>
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</div>
</div>
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