Bug 721409

Summary:

execute getDeviceList asynchronously

Product:

[Retired] oVirt

Reporter:

Haim <hateya>

Component:

vdsm

Assignee:

Dan Kenigsberg <danken>

Status:

CLOSED WONTFIX

QA Contact:

Severity:

medium

Docs Contact:

Priority:

unspecified

Version:

unspecified

CC:

abaron, amureini, bazulay, danken, iheim, mgoldboi, smizrahi, yeylon, ykaul

Target Milestone:

---

Target Release:

3.3.4

Hardware:

x86_64

OS:

Linux

Whiteboard:

storage

Fixed In Version:

Doc Type:

Bug Fix

Doc Text:

Story Points:

---

Clone Of:

Environment:

Last Closed:

2013-02-03 12:25:25 UTC

Type:

---

Regression:

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Mount Type:

---

Documentation:

---

CRM:

Verified Versions:

Category:

---

oVirt Team:

Storage

RHEL 7.3 requirements from Atomic Host:

Cloudforms Team:

---

Target Upstream Version:

Attachments:

Description	Flags
vdsm log	none

Description Haim 2011-07-14 14:12:44 UTC

Description of problem:

scenarios:

- getDeviceList command sent
- lvm stuck as a result, getDeviceList doesn't return (for ever)

if getDeviceList doesn't return, we need to know about it, maybe report something, perform some kind of fencing, current behavior doesn't help and encourage backend\GUI send more and more command which stuck as well and makes it even worse.

Comment 2 Haim 2011-07-14 14:13:50 UTC

Created attachment 512907 [details]
vdsm log

Comment 3 Dan Kenigsberg 2011-07-14 17:01:49 UTC

getDeviceList is synchronous. It would have been nice if it was async, but it is not, and I do not think this could change anytime soon.

The  interesting question are: when does it happen? Is it reproducible? And why did the following little vgs command line block forever? Haim, could you reproduce this and have one of our lvm2 friends (agk?) take a look?

/sbin/lvm vgs --config " devices { preferred_names = [\"^/dev/mapper/\"] ignore_suspended_devices=1 write_cache_state=0 filter = [ \"a%/dev/mapper/1Daffi1309719|/dev/mapper/1ISCSI-PROD11309649|/dev/mapper/1ISCSI-PROD31309649|/dev/mapper/36006016066102900103b0e14f3ade011|/dev/mapper/36006016066102900113b0e14f3ade011|/dev/mapper/36006016066102900114986fbf2ade011|/dev/mapper/36006016066102900123b0e14f3ade011|/dev/mapper/36006016066102900124986fbf2ade011|/dev/mapper/36006016066102900133b0e14f3ade011|/dev/mapper/36006016066102900134986fbf2ade011|/dev/mapper/36006016066102900143b0e14f3ade011|/dev/mapper/36006016066102900144986fbf2ade011|/dev/mapper/36006016066102900153b0e14f3ade011|/dev/mapper/36006016066102900154986fbf2ade011|/dev/mapper/36006016066102900163b0e14f3ade011|/dev/mapper/36006016066102900164986fbf2ade011|/dev/mapper/36006016066102900173b0e14f3ade011|/dev/mapper/36006016066102900174986fbf2ade011|/dev/mapper/36006016066102900183b0e14f3ade011|/dev/mapper/36006016066102900184986fbf2ade011|/dev/mapper/36006016066102900184f9fa57ea2e011|/dev/mapper/36006016066102900193b0e14f3ade011|/dev/mapper/36006016066102900194986fbf2ade011|/dev/mapper/36006016066102900194f9fa57ea2e011|/dev/mapper/360060160661029001a3b0e14f3ade011|/dev/mapper/360060160661029001a4986fbf2ade011|/dev/mapper/360060160661029001a4f9fa57ea2e011|/dev/mapper/360060160661029001b3b0e14f3ade011|/dev/mapper/360060160661029001b4986fbf2ade011|/dev/mapper/360060160661029001b4f9fa57ea2e011|/dev/mapper/360060160661029001c3b0e14f3ade011|/dev/mapper/360060160661029001c4986fbf2ade011|/dev/mapper/360060160661029001c4f9fa57ea2e011|/dev/mapper/360060160661029001d3b0e14f3ade011|/dev/mapper/360060160661029001d4986fbf2ade011|/dev/mapper/360060160661029001d4f9fa57ea2e011|/dev/mapper/360060160661029001e3b0e14f3ade011|/dev/mapper/360060160661029001e4f9fa57ea2e011|/dev/mapper/360060160661029001ee6809f7ea2e011|/dev/mapper/360060160661029001f3b0e14f3ade011|/dev/mapper/360060160661029001f4f9fa57ea2e011|/dev/mapper/360060160661029001fe6809f7ea2e011|/dev/mapper/36006016066102900203b0e14f3ade011|/dev/mapper/36006016066102900204f9fa57ea2e011|/dev/mapper/3600601606610290020bca0fc8b95e011|/dev/mapper/3600601606610290020e6809f7ea2e011|/dev/mapper/36006016066102900213b0e14f3ade011|/dev/mapper/3600601606610290021e6809f7ea2e011|/dev/mapper/36006016066102900223b0e14f3ade011|/dev/mapper/3600601606610290022e6809f7ea2e011|/dev/mapper/36006016066102900233b0e14f3ade011|/dev/mapper/3600601606610290023e6809f7ea2e011|/dev/mapper/36006016066102900243b0e14f3ade011|/dev/mapper/3600601606610290024e6809f7ea2e011|/dev/mapper/36006016066102900341493a64a79e011|/dev/mapper/36006016066102900351493a64a79e011|/dev/mapper/36006016066102900361493a64a79e011|/dev/mapper/36006016066102900441dd38b7ea2e011|/dev/mapper/3600601606610290044225381f79fe011|/dev/mapper/36006016066102900451dd38b7ea2e011|/dev/mapper/3600601606610290046bfdc0df3ade011|/dev/mapper/3600601606610290047bfdc0df3ade011|/dev/mapper/3600601606610290048bfdc0df3ade011|/dev/mapper/3600601606610290049bfdc0df3ade011|/dev/mapper/360060160661029004ab16426f3ade011|/dev/mapper/360060160661029004abfdc0df3ade011|/dev/mapper/360060160661029004bb16426f3ade011|/dev/mapper/360060160661029004bbfdc0df3ade011|/dev/mapper/360060160661029004cb16426f3ade011|/dev/mapper/360060160661029004cbfdc0df3ade011|/dev/mapper/360060160661029004db16426f3ade011|/dev/mapper/360060160661029004dbfdc0df3ade011|/dev/mapper/360060160661029004ebfdc0df3ade011|/dev/mapper/360060160661029004fbfdc0df3ade011|/dev/mapper/3600601606610290050bfdc0df3ade011|/dev/mapper/3600601606610290051bfdc0df3ade011|/dev/mapper/3600601606610290052bfdc0df3ade011|/dev/mapper/3600601606610290053bfdc0df3ade011|/dev/mapper/3600601606610290054bfdc0df3ade011|/dev/mapper/3600601606610290055bfdc0df3ade011|/dev/mapper/3600601606610290056bfdc0df3ade011|/dev/mapper/3600601606610290057bfdc0df3ade011|/dev/mapper/3600601606610290058bfdc0df3ade011|/dev/mapper/3600601606610290059bfdc0df3ade011|/dev/mapper/360060160661029005abfdc0df3ade011|/dev/mapper/360060160661029005bbfdc0df3ade011|/dev/mapper/3600601606610290062dda83b849de011|/dev/mapper/3600601606610290063dda83b849de011|/dev/mapper/3600601606610290064dda83b849de011|/dev/mapper/3600601606610290065dda83b849de011|/dev/mapper/3600601606610290066dda83b849de011|/dev/mapper/3600601606610290067dda83b849de011|/dev/mapper/3600601606610290068dda83b849de011|/dev/mapper/3600601606610290069dda83b849de011|/dev/mapper/360060160661029006adda83b849de011|/dev/mapper/360060160661029006bdda83b849de011|/dev/mapper/360060160661029006c965420f3ade011|/dev/mapper/360060160661029006cdda83b849de011|/dev/mapper/360060160661029006d965420f3ade011|/dev/mapper/360060160661029006ddda83b849de011|/dev/mapper/360060160661029006e965420f3ade011|/dev/mapper/360060160661029006f965420f3ade011|/dev/mapper/36006016066102900706966b27ea2e011|/dev/mapper/3600601606610290070965420f3ade011|/dev/mapper/36006016066102900716966b27ea2e011|/dev/mapper/3600601606610290071965420f3ade011|/dev/mapper/36006016066102900726966b27ea2e011|/dev/mapper/36006016066102900736966b27ea2e011|/dev/mapper/36006016066102900746966b27ea2e011|/dev/mapper/360060160661029007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\"r%.*%\" ] }  global {  locking_type=1  prioritise_write_locks=1  wait_for_locks=1 }  backup {  retain_min = 50  retain_days = 0 } " --noheadings --units b --nosuffix --separator | -o uuid,name,attr,size,free,extent_size,extent_count,free_count,tags

Comment 4 Haim 2011-07-15 09:46:02 UTC

(In reply to comment #3)
> getDeviceList is synchronous. It would have been nice if it was async, but it
> is not, and I do not think this could change anytime soon.
> 
> The  interesting question are: when does it happen? Is it reproducible? And why
> did the following little vgs command line block forever? Haim, could you
> reproduce this and have one of our lvm2 friends (agk?) take a look?
> 
> /sbin/lvm vgs --config " devices { preferred_names = [\"^/dev/mapper/\"]
> ignore_suspended_devices=1 write_cache_state=0 filter = [
> \"a%/dev/mapper/1Daffi1309719|/dev/mapper/1ISCSI-PROD11309649|/dev/mapper/1ISCSI-PROD31309649|/dev/mapper/36006016066102900103b0e14f3ade011|/dev/mapper/36006016066102900113b0e14f3ade011|/dev/mapper/36006016066102900114986fbf2ade011|/dev/mapper/36006016066102900123b0e14f3ade011|/dev/mapper/36006016066102900124986fbf2ade011|/dev/mapper/36006016066102900133b0e14f3ade011|/dev/mapper/36006016066102900134986fbf2ade011|/dev/mapper/36006016066102900143b0e14f3ade011|/dev/mapper/36006016066102900144986fbf2ade011|/dev/mapper/36006016066102900153b0e14f3ade011|/dev/mapper/36006016066102900154986fbf2ade011|/dev/mapper/36006016066102900163b0e14f3ade011|/dev/mapper/36006016066102900164986fbf2ade011|/dev/mapper/36006016066102900173b0e14f3ade011|/dev/mapper/36006016066102900174986fbf2ade011|/dev/mapper/36006016066102900183b0e14f3ade011|/dev/mapper/36006016066102900184986fbf2ade011|/dev/mapper/36006016066102900184f9fa57ea2e011|/dev/mapper/36006016066102900193b0e14f3ade011|/dev/mapper/36006016066102900194986fbf2ade011|/dev/mapper/36006016066102900194f9fa57ea2e011|/dev/mapper/360060160661029001a3b0e14f3ade011|/dev/mapper/360060160661029001a4986fbf2ade011|/dev/mapper/360060160661029001a4f9fa57ea2e011|/dev/mapper/360060160661029001b3b0e14f3ade011|/dev/mapper/360060160661029001b4986fbf2ade011|/dev/mapper/360060160661029001b4f9fa57ea2e011|/dev/mapper/360060160661029001c3b0e14f3ade011|/dev/mapper/360060160661029001c4986fbf2ade011|/dev/mapper/360060160661029001c4f9fa57ea2e011|/dev/mapper/360060160661029001d3b0e14f3ade011|/dev/mapper/360060160661029001d4986fbf2ade011|/dev/mapper/360060160661029001d4f9fa57ea2e011|/dev/mapper/360060160661029001e3b0e14f3ade011|/dev/mapper/360060160661029001e4f9fa57ea2e011|/dev/mapper/360060160661029001ee6809f7ea2e011|/dev/mapper/360060160661029001f3b0e14f3ade011|/dev/mapper/360060160661029001f4f9fa57ea2e011|/dev/mapper/360060160661029001fe6809f7ea2e011|/dev/mapper/36006016066102900203b0e14f3ade011|/dev/mapper/36006016066102900204f9fa57ea2e011|/dev/mapper/3600601606610290020bca0fc8b95e011|/dev/mapper/3600601606610290020e6809f7ea2e011|/dev/mapper/36006016066102900213b0e14f3ade011|/dev/mapper/3600601606610290021e6809f7ea2e011|/dev/mapper/36006016066102900223b0e14f3ade011|/dev/mapper/3600601606610290022e6809f7ea2e011|/dev/mapper/36006016066102900233b0e14f3ade011|/dev/mapper/3600601606610290023e6809f7ea2e011|/dev/mapper/36006016066102900243b0e14f3ade011|/dev/mapper/3600601606610290024e6809f7ea2e011|/dev/mapper/36006016066102900341493a64a79e011|/dev/mapper/36006016066102900351493a64a79e011|/dev/mapper/36006016066102900361493a64a79e011|/dev/mapper/36006016066102900441dd38b7ea2e011|/dev/mapper/3600601606610290044225381f79fe011|/dev/mapper/36006016066102900451dd38b7ea2e011|/dev/mapper/3600601606610290046bfdc0df3ade011|/dev/mapper/3600601606610290047bfdc0df3ade011|/dev/mapper/3600601606610290048bfdc0df3ade011|/dev/mapper/3600601606610290049bfdc0df3ade011|/dev/mapper/360060160661029004ab16426f3ade011|/dev/mapper/360060160661029004abfdc0df3ade011|/dev/mapper/360060160661029004bb16426f3ade011|/dev/mapper/360060160661029004bbfdc0df3ade011|/dev/mapper/360060160661029004cb16426f3ade011|/dev/mapper/360060160661029004cbfdc0df3ade011|/dev/mapper/360060160661029004db16426f3ade011|/dev/mapper/360060160661029004dbfdc0df3ade011|/dev/mapper/360060160661029004ebfdc0df3ade011|/dev/mapper/360060160661029004fbfdc0df3ade011|/dev/mapper/3600601606610290050bfdc0df3ade011|/dev/mapper/3600601606610290051bfdc0df3ade011|/dev/mapper/3600601606610290052bfdc0df3ade011|/dev/mapper/3600601606610290053bfdc0df3ade011|/dev/mapper/3600601606610290054bfdc0df3ade011|/dev/mapper/3600601606610290055bfdc0df3ade011|/dev/mapper/3600601606610290056bfdc0df3ade011|/dev/mapper/3600601606610290057bfdc0df3ade011|/dev/mapper/3600601606610290058bfdc0df3ade011|/dev/mapper/3600601606610290059bfdc0df3ade011|/dev/mapper/360060160661029005abfdc0df3ade011|/dev/mapper/360060160661029005bbfdc0df3ade011|/dev/mapper/3600601606610290062dda83b849de011|/dev/mapper/3600601606610290063dda83b849de011|/dev/mapper/3600601606610290064dda83b849de011|/dev/mapper/3600601606610290065dda83b849de011|/dev/mapper/3600601606610290066dda83b849de011|/dev/mapper/3600601606610290067dda83b849de011|/dev/mapper/3600601606610290068dda83b849de011|/dev/mapper/3600601606610290069dda83b849de011|/dev/mapper/360060160661029006adda83b849de011|/dev/mapper/360060160661029006bdda83b849de011|/dev/mapper/360060160661029006c965420f3ade011|/dev/mapper/360060160661029006cdda83b849de011|/dev/mapper/360060160661029006d965420f3ade011|/dev/mapper/360060160661029006ddda83b849de011|/dev/mapper/360060160661029006e965420f3ade011|/dev/mapper/360060160661029006f965420f3ade011|/dev/mapper/36006016066102900706966b27ea2e011|/dev/mapper/3600601606610290070965420f3ade011|/dev/mapper/36006016066102900716966b27ea2e011|/dev/mapper/3600601606610290071965420f3ade011|/dev/mapper/36006016066102900726966b27ea2e011|/dev/mapper/36006016066102900736966b27ea2e011|/dev/mapper/36006016066102900746966b27ea2e011|/dev/mapper/360060160661029007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> \"r%.*%\" ] }  global {  locking_type=1  prioritise_write_locks=1 
> wait_for_locks=1 }  backup {  retain_min = 50  retain_days = 0 } " --noheadings
> --units b --nosuffix --separator | -o
> uuid,name,attr,size,free,extent_size,extent_count,free_count,tags

Dan, first, I already spoke with LVM guys (mbroz), and the reason lvm operation stuck was due to multipath errors along with kpartx stuck in kernel. 
I think i know how to reproduce, and might open a different bz on device-mapper-multipith, however, it does not change the fact that getDeviceList is sync operation, and if it stuck, i want to know about it, and maybe build some login around it from backend side, of course, this can be postpone to later versions.

Comment 5 Dan Kenigsberg 2011-07-15 19:18:43 UTC

I have no idea how rhev-m could circumvent a call to getDeviceList that takes a lot of time; but making this verb asynchronous (in some future version) sounds reasonable.

Comment 9 Itamar Heim 2013-02-03 12:25:25 UTC

Closing old bugs. If this issue is still relevant/important in current version, please re-open the bug.