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<div class="moz-cite-prefix">Royce,<br>
<br>
It is a good trouble shooting. See my comments about the IOError
in serve_client() below.<br>
<br>
Royce Lv:<br>
</div>
<blockquote cite="mid:51020A6F.6040201@linux.vnet.ibm.com"
type="cite">
<meta content="text/html; charset=ISO-8859-1"
http-equiv="Content-Type">
<div class="moz-cite-prefix"><br>
Hi,<br>
I reproduced this issue, and I believe it's a python bug.<br>
1. How to reproduce:<br>
with the test case attached, put it under
/usr/share/vdsm/tests/, run #./run_tests.sh superVdsmTests.py<br>
and this issue will be reproduced.<br>
2.Log analyse:<br>
We notice a strange pattern in this log: connectStorageServer
be called twice, first supervdsm call succeed, second fails
becasue of validateAccess().<br>
That is because for the first call validateAccess returns
normally and leave a child there, when the second validateAccess
call arrives and multirprocessing manager is receiving the
method message, it is just the time first child exit and SIGCHLD
comming, this signal interrupted multiprocessing receive system
call, python managers.py should handle INTR and retry recv()
like we do in vdsm but it's not, so the second one raise error.<br>
<pre wrap="">>Thread-18::DEBUG::2013-01-22 10:41:03,570::misc::85::Storage.Misc.excCmd::(<lambda>) '/usr/bin/sudo -n /bin/mount -t nfs -o soft,nosharecache,timeo=600,retrans=6,nfsvers=3 192.168.0.1:/ovirt/silvermoon /rhev/data-center/mnt/192.168.0.1:_ovirt_silvermoon' (cwd None)
>Thread-18::DEBUG::2013-01-22 10:41:03,607::misc::85::Storage.Misc.excCmd::(<lambda>) '/usr/bin/sudo -n /bin/mount -t nfs -o soft,nosharecache,timeo=600,retrans=6,nfsvers=3 192.168.0.1:/ovirt/undercity /rhev/data-center/mnt/192.168.0.1:_ovirt_undercity' (cwd None)
>Thread-18::ERROR::2013-01-22 10:41:03,627::hsm::2215::Storage.HSM::(connectStorageServer) Could not connect to storageServer
>Traceback (most recent call last):
> File "/usr/share/vdsm/storage/hsm.py", line 2211, in connectStorageServer
> conObj.connect()
> File "/usr/share/vdsm/storage/storageServer.py", line 303, in connect
> return self._mountCon.connect()
> File "/usr/share/vdsm/storage/storageServer.py", line 209, in connect
> fileSD.validateDirAccess(self.getMountObj().getRecord().fs_file)
> File "/usr/share/vdsm/storage/fileSD.py", line 55, in validateDirAccess
> (os.R_OK | os.X_OK))
> File "/usr/share/vdsm/supervdsm.py", line 81, in __call__
> return callMethod()
> File "/usr/share/vdsm/supervdsm.py", line 72, in <lambda>
> **kwargs)
> File "<string>", line 2, in validateAccess
> File "/usr/lib64/python2.6/multiprocessing/managers.py", line 740, in _callmethod
> raise convert_to_error(kind, result)
</pre>
the vdsm side receive RemoteError because of supervdsm server
multiprocessing manager raise error KIND='TRACEBACK'<br>
<pre> >RemoteError:
</pre>
The upper part is the trace back from the client side, the
following part is from server side:<br>
<pre>>---------------------------------------------------------------------------
>Traceback (most recent call last):
> File "/usr/lib64/python2.6/multiprocessing/managers.py", line 214, in serve_client
> request = recv()
>IOError: [Errno 4] Interrupted system call
>---------------------------------------------------------------------------
</pre>
Corresponding Python source code:managers.py(Server side)<br>
<pre> def serve_client(self, conn):</pre>
<pre> '''</pre>
<pre> Handle requests from the proxies in a particular process/thread</pre>
<pre> '''</pre>
<pre> util.debug('starting server thread to service %r',</pre>
<pre> threading.current_thread().name)</pre>
<pre> recv = conn.recv</pre>
<pre> send = conn.send</pre>
<pre> id_to_obj = self.id_to_obj</pre>
<pre> while not self.stop:</pre>
<pre> try:</pre>
<pre> methodname = obj = None</pre>
<pre> request = recv()<------------------<font color="#3366ff">this line been interrupted by SIGCHLD</font></pre>
<pre> ident, methodname, args, kwds = request</pre>
<pre> obj, exposed, gettypeid = id_to_obj[ident]</pre>
<pre> if methodname not in exposed:</pre>
<pre> raise AttributeError(</pre>
<pre> 'method %r of %r object is not in exposed=%r' %</pre>
<pre> (methodname, type(obj), exposed)</pre>
<pre> )</pre>
<pre> function = getattr(obj, methodname)
try:</pre>
<pre> res = function(*args, **kwds)</pre>
<pre> except Exception, e:</pre>
<pre> msg = ('#ERROR', e)</pre>
<pre> else:</pre>
<pre> typeid = gettypeid and gettypeid.get(methodname, None)</pre>
<pre> if typeid:</pre>
<pre> rident, rexposed = self.create(conn, typeid, res)</pre>
<pre> token = Token(typeid, self.address, rident)</pre>
<pre> msg = ('#PROXY', (rexposed, token))</pre>
<pre> else:</pre>
<pre> msg = ('#RETURN', res)
except AttributeError:
if methodname is None:
msg = ('#TRACEBACK', format_exc())
else:
try:
fallback_func = self.fallback_mapping[methodname]
result = fallback_func(
self, conn, ident, obj, *args, **kwds
)
msg = ('#RETURN', result)
except Exception:
msg = ('#TRACEBACK', format_exc())
except EOFError:
util.debug('got EOF -- exiting thread serving %r',
threading.current_thread().name)
sys.exit(0)
except Exception:<------<font color="#3366ff">does not handle IOError,INTR here should retry recv() </font>
msg = ('#TRACEBACK', format_exc())</pre>
</div>
</blockquote>
Not sure I under what is your opinion here. <br>
<br>
Whenever this line was interrupted by a SIGCHLD , <br>
<pre>request = recv()<------------------<font color="#3366ff">this line been interrupted by SIGCHLD</font></pre>
the code flow should fall into <br>
<br>
<pre> except Exception:<------<font color="#3366ff">does not handle IOError,INTR here should retry recv() </font>
msg = ('#TRACEBACK', format_exc())
However, the big while loop was not stopped, it should reach this line again.
</pre>
try:
<pre> methodname = obj = None</pre>
<pre> request = recv()<------------------<font color="#3366ff">this line been interrupted by SIGCHLD</font>
</pre>
Then the interrupted recv() will be called again and again until the
recv() call is not interrupted. What's wrong here?<br>
<br>
<blockquote cite="mid:51020A6F.6040201@linux.vnet.ibm.com"
type="cite">
<div class="moz-cite-prefix">
<pre>
</pre>
<br>
<br>
3. Actions we will take:<br>
(1)As a work round we can first remove the zombie reaper from
supervdsm server<br>
(2)I'll see whether python has a fixed version for this<br>
(3)Yaniv is working on changing vdsm/svdsm communication channel
to pipe and handle it ourselves, I believe we'll get rid of this
with that properly handled.<br>
<br>
<br>
On 01/25/2013 06:00 AM, Dead Horse wrote:<br>
</div>
<blockquote
cite="mid:CAEWPe=qjozgWjK3U7-PDky8kToy8=R9A=ES32hQj1qmhhczTjA@mail.gmail.com"
type="cite">
<div dir="ltr">
<div>Tried some manual edits to SD states in the dbase. The
net result was I was able to get a node active. However as
reconstructing the master storage domain kicked in it was
unable to do so. It was also not able to recognize the other
SD with similar failure modes to the unrecognized master
above. Guessing the newer VDSM version borked things pretty
good. So being as this is a test harness and the SD data is
not worth saving I just smoked the all SD. I ran
engine-cleanup and started from fresh and all is well now.<br>
<br>
</div>
- DHC<br>
</div>
<div class="gmail_extra"><br>
<br>
<div class="gmail_quote">On Thu, Jan 24, 2013 at 11:53 AM,
Dead Horse <span dir="ltr"><<a moz-do-not-send="true"
href="mailto:deadhorseconsulting@gmail.com"
target="_blank">deadhorseconsulting@gmail.com</a>></span>
wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">
<div dir="ltr">
<div>
<div>
<div>
<div>This test harness setup here consists of two
servers tied to NFS storage via IB (NFS mounts
are via IPoIB, NFS over RDMA is disabled) . All
storage domains are NFS. The issue does occur
with both servers on when attempting to bring
them out of maintenance mode with the end result
being non-operational due to storage attach
fail.<br>
<br>
</div>
The current issue is now that with a working older
commit the master storage domain is "stuck" in
state "locked" and I see the secondary issue
wherein VDSM cannot seem to find or contact the
master storage domain even though it is there. I
am can mount the master storage domain manually
and and all content appears to be accounted for
accordingly on either host. <br>
<br>
</div>
Here is the current contents of the master storage
domain metadata:<br>
CLASS=Data<br>
DESCRIPTION=orgrimmar<br>
IOOPTIMEOUTSEC=1<br>
LEASERETRIES=3<br>
LEASETIMESEC=5<br>
LOCKPOLICY=<br>
LOCKRENEWALINTERVALSEC=5<br>
MASTER_VERSION=417<br>
POOL_DESCRIPTION=Azeroth<br>
POOL_DOMAINS=0549ee91-4498-4130-8c23-4c173b5c0959:Active,d8b55105-c90a-465d-9803-8130da9a671e:Active,67534cca-1327-462a-b455-a04464084b31:Active,c331a800-839d-4d23-9059-870a7471240a:Active,f8984825-ff8d-43d9-91db-0d0959f8bae9:Active,c434056e-96be-4702-8beb-82a408a5c8cb:Active,f7da73c7-b5fe-48b6-93a0-0c773018c94f:Active,82e3b34a-6f89-4299-8cd8-2cc8f973a3b4:Active,e615c975-6b00-469f-8fb6-ff58ae3fdb2c:Active,5bc86532-55f7-4a91-a52c-fad261f322d5:Active,1130b87a-3b34-45d6-8016-d435825c68ef:Active<br>
POOL_SPM_ID=1<br>
POOL_SPM_LVER=6<br>
POOL_UUID=f90a0d1c-06ca-11e2-a05b-00151712f280<br>
REMOTE_PATH=192.168.0.1:/ovirt/orgrimmar<br>
ROLE=Master<br>
SDUUID=67534cca-1327-462a-b455-a04464084b31<br>
TYPE=NFS<br>
VERSION=3<br>
_SHA_CKSUM=1442bb078fd8c9468d241ff141e9bf53839f0721<br>
<br>
So now with the older working commit I now get this
the "StoragePoolMasterNotFound: Cannot find master
domain" error (prior details above when I worked
backwards to that commit)<br>
<br>
This is odd as the nodes can definitely reach the
master storage domain:<br>
<br>
</div>
showmount from one of the el6.3 nodes:<br>
[root@kezan ~]# showmount -e 192.168.0.1<br>
Export list for <a moz-do-not-send="true"
href="http://192.168.0.1" target="_blank">192.168.0.1</a>:<br>
/ovirt/orgrimmar <a moz-do-not-send="true"
href="http://192.168.0.0/16" target="_blank">192.168.0.0/16</a><br>
<br>
</div>
mount/ls from one of the nodes:<br>
<div>
<div>[root@kezan ~]# mount
192.168.0.1:/ovirt/orgrimmar /mnt<br>
[root@kezan ~]# ls -al
/mnt/67534cca-1327-462a-b455-a04464084b31/dom_md/<br>
total 1100<br>
drwxr-xr-x 2 vdsm kvm 4096 Jan 24 11:44 .<br>
drwxr-xr-x 5 vdsm kvm 4096 Oct 19 16:16 ..<br>
-rw-rw---- 1 vdsm kvm 1048576 Jan 19 22:09 ids<br>
-rw-rw---- 1 vdsm kvm 0 Sep 25 00:46 inbox<br>
-rw-rw---- 1 vdsm kvm 2097152 Jan 10 13:33 leases<br>
-rw-r--r-- 1 vdsm kvm 903 Jan 10 13:39 metadata<br>
-rw-rw---- 1 vdsm kvm 0 Sep 25 00:46 outbox<br>
<br>
<br>
</div>
<div>- DHC<br>
</div>
<div><br>
</div>
</div>
</div>
<div class="HOEnZb">
<div class="h5">
<div class="gmail_extra"><br>
<br>
<div class="gmail_quote">On Thu, Jan 24, 2013 at
7:51 AM, ybronhei <span dir="ltr"><<a
moz-do-not-send="true"
href="mailto:ybronhei@redhat.com"
target="_blank">ybronhei@redhat.com</a>></span>
wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0
0 .8ex;border-left:1px #ccc
solid;padding-left:1ex">
<div>On 01/24/2013 12:44 AM, Dead Horse wrote:<br>
</div>
<blockquote class="gmail_quote" style="margin:0
0 0 .8ex;border-left:1px #ccc
solid;padding-left:1ex">
<div> I narrowed down on the commit where the
originally reported issue crept in:<br>
</div>
commitfc3a44f71d2ef202cff18d7203b9e4165b546621building
and testing with
<div><br>
this commit or subsequent commits yields the
original issue.<br>
</div>
</blockquote>
Interesting.. it might be related to this commit
and we're trying to reproduce it.<br>
<br>
Did you try to remove that code and run again?
does it work without the additional of
zombieReaper?<br>
does the connectivity to the storage work well?
when you run 'ls' on the mounted folder you get
see the files without a long delay ? it might
related to too long timeout when validating
access to this mount..<br>
we work on that.. any additional info can help<br>
<br>
Thanks.
<div>
<div><br>
<blockquote class="gmail_quote"
style="margin:0 0 0 .8ex;border-left:1px
#ccc solid;padding-left:1ex"> <br>
- DHC<br>
<br>
<br>
On Wed, Jan 23, 2013 at 3:56 PM, Dead
Horse<br>
<<a moz-do-not-send="true"
href="mailto:deadhorseconsulting@gmail.com"
target="_blank">deadhorseconsulting@gmail.com</a>>wrote:<br>
<br>
<blockquote class="gmail_quote"
style="margin:0 0 0 .8ex;border-left:1px
#ccc solid;padding-left:1ex"> Indeed
reverting back to an older vdsm clears
up the above issue. However<br>
now I the issue is see is:<br>
Thread-18::ERROR::2013-01-23<br>
15:50:42,885::task::833::TaskManager.Task::(_setError)<br>
Task=`08709e68-bcbc-40d8-843a-d69d4df40ac6`::Unexpected
error<br>
<br>
Traceback (most recent call last):<br>
File
"/usr/share/vdsm/storage/task.py", line
840, in _run<br>
return fn(*args, **kargs)<br>
File "/usr/share/vdsm/logUtils.py",
line 42, in wrapper<br>
res = f(*args, **kwargs)<br>
File
"/usr/share/vdsm/storage/hsm.py", line
923, in connectStoragePool<br>
masterVersion, options)<br>
File
"/usr/share/vdsm/storage/hsm.py", line
970, in _connectStoragePool<br>
res = pool.connect(hostID, scsiKey,
msdUUID, masterVersion)<br>
File "/usr/share/vdsm/storage/sp.py",
line 643, in connect<br>
self.__rebuild(msdUUID=msdUUID,
masterVersion=masterVersion)<br>
File "/usr/share/vdsm/storage/sp.py",
line 1167, in __rebuild<br>
self.masterDomain =
self.getMasterDomain(msdUUID=msdUUID,<br>
masterVersion=masterVersion)<br>
File "/usr/share/vdsm/storage/sp.py",
line 1506, in getMasterDomain<br>
raise
se.StoragePoolMasterNotFound(self.spUUID,
msdUUID)<br>
StoragePoolMasterNotFound: Cannot find
master domain:<br>
'spUUID=f90a0d1c-06ca-11e2-a05b-00151712f280,<br>
msdUUID=67534cca-1327-462a-b455-a04464084b31'<br>
Thread-18::DEBUG::2013-01-23<br>
15:50:42,887::task::852::TaskManager.Task::(_run)<br>
Task=`08709e68-bcbc-40d8-843a-d69d4df40ac6`::Task._run:<br>
08709e68-bcbc-40d8-843a-d69d4df40ac6<br>
('f90a0d1c-06ca-11e2-a05b-00151712f280',
2,<br>
'f90a0d1c-06ca-11e2-a05b-00151712f280',<br>
'67534cca-1327-462a-b455-a04464084b31',
433) {} failed - stopping task<br>
<br>
This is with vdsm built from<br>
commit25a2d8572ad32352227c98a86631300fbd6523c1<br>
- DHC<br>
<br>
<br>
On Wed, Jan 23, 2013 at 10:44 AM, Dead
Horse <<br>
<a moz-do-not-send="true"
href="mailto:deadhorseconsulting@gmail.com"
target="_blank">deadhorseconsulting@gmail.com</a>>
wrote:<br>
<br>
<blockquote class="gmail_quote"
style="margin:0 0 0
.8ex;border-left:1px #ccc
solid;padding-left:1ex"> VDSM was
built from:<br>
commit
166138e37e75767b32227746bb671b1dab9cdd5e<br>
<br>
Attached is the full vdsm log<br>
<br>
I should also note that from engine
perspective it sees the master<br>
storage domain as locked and the
others as unknown.<br>
<br>
<br>
On Wed, Jan 23, 2013 at 2:49 AM, Dan
Kenigsberg <<a
moz-do-not-send="true"
href="mailto:danken@redhat.com"
target="_blank">danken@redhat.com</a>>wrote:<br>
<br>
<blockquote class="gmail_quote"
style="margin:0 0 0
.8ex;border-left:1px #ccc
solid;padding-left:1ex"> On Tue, Jan
22, 2013 at 04:02:24PM -0600, Dead
Horse wrote:<br>
<blockquote class="gmail_quote"
style="margin:0 0 0
.8ex;border-left:1px #ccc
solid;padding-left:1ex"> Any ideas
on this one? (from VDSM log):<br>
Thread-25::DEBUG::2013-01-22<br>
15:35:29,065::BindingXMLRPC::914::vds::(wrapper)
client<br>
</blockquote>
[3.57.111.30]::call<br>
<blockquote class="gmail_quote"
style="margin:0 0 0
.8ex;border-left:1px #ccc
solid;padding-left:1ex">
getCapabilities with () {}<br>
Thread-25::ERROR::2013-01-22
15:35:29,113::netinfo::159::root::(speed)<br>
cannot read ib0 speed<br>
Traceback (most recent call last):<br>
File
"/usr/lib64/python2.6/site-packages/vdsm/netinfo.py",
line 155,<br>
</blockquote>
in<br>
<blockquote class="gmail_quote"
style="margin:0 0 0
.8ex;border-left:1px #ccc
solid;padding-left:1ex"> speed<br>
s =
int(file('/sys/class/net/%s/speed'
% dev).read())<br>
IOError: [Errno 22] Invalid
argument<br>
<br>
Causes VDSM to fail to attach
storage<br>
</blockquote>
<br>
I doubt that this is the cause of
the failure, as vdsm has always<br>
reported "0" for ib devices, and
still is.<br>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</div>
</div>
it happens only when you call to
getCapabilities.. so it doesn't related to the
flow, and it can't effect the storage.<br>
Dan: I guess this is not the issue but why is
the IOError?<br>
<blockquote class="gmail_quote" style="margin:0
0 0 .8ex;border-left:1px #ccc
solid;padding-left:1ex">
<div>
<div>
<blockquote class="gmail_quote"
style="margin:0 0 0 .8ex;border-left:1px
#ccc solid;padding-left:1ex">
<blockquote class="gmail_quote"
style="margin:0 0 0
.8ex;border-left:1px #ccc
solid;padding-left:1ex">
<blockquote class="gmail_quote"
style="margin:0 0 0
.8ex;border-left:1px #ccc
solid;padding-left:1ex"> <br>
Does a former version works with
your Engine?<br>
Could you share more of your
vdsm.log? I suppose the culprit lies
in one<br>
one of the storage-related commands,
not in statistics retrieval.<br>
<br>
<blockquote class="gmail_quote"
style="margin:0 0 0
.8ex;border-left:1px #ccc
solid;padding-left:1ex"> <br>
Engine side sees:<br>
ERROR
[org.ovirt.engine.core.bll.storage.NFSStorageHelper]<br>
(QuartzScheduler_Worker-96)
[553ef26e] The connection with
details<br>
192.168.0.1:/ovirt/ds failed
because of error code 100 and
error<br>
</blockquote>
message<br>
<blockquote class="gmail_quote"
style="margin:0 0 0
.8ex;border-left:1px #ccc
solid;padding-left:1ex"> is:
general exception<br>
2013-01-22 15:35:30,160 INFO<br>
[org.ovirt.engine.core.bll.SetNonOperationalVdsCommand]<br>
(QuartzScheduler_Worker-96)
[1ab78378] Running command:<br>
SetNonOperationalVdsCommand
internal: true. Entities affected
: ID:<br>
8970b3fe-1faf-11e2-bc1f-00151712f280
Type: VDS<br>
2013-01-22 15:35:30,200 INFO<br>
[org.ovirt.engine.core.vdsbroker.SetVdsStatusVDSCommand]<br>
(QuartzScheduler_Worker-96)
[1ab78378] START,<br>
SetVdsStatusVDSCommand(HostName =
kezan, HostId =<br>
8970b3fe-1faf-11e2-bc1f-00151712f280,
status=NonOperational,<br>
nonOperationalReason=STORAGE_DOMAIN_UNREACHABLE),
log id: 4af5c4cd<br>
2013-01-22 15:35:30,211 INFO<br>
[org.ovirt.engine.core.vdsbroker.SetVdsStatusVDSCommand]<br>
(QuartzScheduler_Worker-96)
[1ab78378] FINISH,
SetVdsStatusVDSCommand,<br>
</blockquote>
log<br>
<blockquote class="gmail_quote"
style="margin:0 0 0
.8ex;border-left:1px #ccc
solid;padding-left:1ex"> id:
4af5c4cd<br>
2013-01-22 15:35:30,242 ERROR<br>
[org.ovirt.engine.core.dal.dbbroker.auditloghandling.AuditLogDirector]<br>
(QuartzScheduler_Worker-96)
[1ab78378] Try to add duplicate
audit log<br>
values with the same name. Type:
VDS_SET_NONOPERATIONAL_DOMAIN.
Value:<br>
storagepoolname<br>
<br>
Engine = latest master<br>
VDSM = latest master<br>
</blockquote>
<br>
Since "latest master" is an unstable
reference by definition, I'm sure<br>
that History would thank you if you
post the exact version (git hash?)<br>
of the code.<br>
<br>
<blockquote class="gmail_quote"
style="margin:0 0 0
.8ex;border-left:1px #ccc
solid;padding-left:1ex"> node =
el6<br>
</blockquote>
<br>
<br>
</blockquote>
<br>
</blockquote>
<br>
</blockquote>
<br>
<br>
<br>
</div>
</div>
_______________________________________________<br>
Users mailing list<br>
<a moz-do-not-send="true"
href="mailto:Users@ovirt.org"
target="_blank">Users@ovirt.org</a><br>
<a moz-do-not-send="true"
href="http://lists.ovirt.org/mailman/listinfo/users"
target="_blank">http://lists.ovirt.org/mailman/listinfo/users</a><br>
<br>
<span><font color="#888888"> </font></span></blockquote>
<span><font color="#888888"> <br>
<br>
-- <br>
Yaniv Bronhaim.<br>
RedHat, Israel<br>
09-7692289<br>
054-7744187<br>
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<pre wrap="">_______________________________________________
Users mailing list
<a class="moz-txt-link-abbreviated" href="mailto:Users@ovirt.org">Users@ovirt.org</a>
<a class="moz-txt-link-freetext" href="http://lists.ovirt.org/mailman/listinfo/users">http://lists.ovirt.org/mailman/listinfo/users</a>
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<pre class="moz-signature" cols="72">--
---
舒明 Shu Ming
Open Virtualization Engineerning; CSTL, IBM Corp.
Tel: 86-10-82451626 Tieline: 9051626 E-mail: <a class="moz-txt-link-abbreviated" href="mailto:shuming@cn.ibm.com">shuming@cn.ibm.com</a> or <a class="moz-txt-link-abbreviated" href="mailto:shuming@linux.vnet.ibm.com">shuming@linux.vnet.ibm.com</a>
Address: 3/F Ring Building, ZhongGuanCun Software Park, Haidian District, Beijing 100193, PRC</pre>
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