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Bug 1103687 - psql table, "async_task" isn't cleared,after creation of multiple templates and restarting vdsmd service
Summary: psql table, "async_task" isn't cleared,after creation of multiple templates a...
Alias: None
Product: Red Hat Enterprise Virtualization Manager
Classification: Red Hat
Component: ovirt-engine
Version: 3.4.0
Hardware: Unspecified
OS: Unspecified
Target Milestone: ---
: 3.5.0
Assignee: Liron Aravot
QA Contact: Ori Gofen
Whiteboard: storage
Depends On:
Blocks: rhev3.5beta 1156165
TreeView+ depends on / blocked
Reported: 2014-06-02 11:17 UTC by Ori Gofen
Modified: 2016-05-26 01:48 UTC (History)
15 users (show)

Fixed In Version: vt1.3
Doc Type: Bug Fix
Doc Text:
Clone Of:
Last Closed:
oVirt Team: Storage
Target Upstream Version:

Attachments (Terms of Use)
async_tasks (deleted)
2014-06-02 11:17 UTC, Ori Gofen
no flags Details
vdsm+engine logs as requested (deleted)
2014-06-05 11:11 UTC, Ori Gofen
no flags Details
vdsm+engine logs (deleted)
2014-07-29 09:30 UTC, Ori Gofen
no flags Details

System ID Priority Status Summary Last Updated
oVirt gerrit 28951 master MERGED core: always attempt to clear tasks without vdsm id Never
oVirt gerrit 29552 ovirt-engine-3.5 ABANDONED core: always attempt to clear tasks without vdsm id Never

Description Ori Gofen 2014-06-02 11:17:25 UTC
Created attachment 901402 [details]

Description of problem:
When creating large amount of templates,the tasks info are kept in the psql table,
once interrupting the procedure with vdsmd restart,the operation fails,but the tasks remain on the table(see image).

engine=# SELECT task_id FROM async_tasks;
(7 rows)

Version-Release number of selected component (if applicable):

How reproducible:

Steps to Reproduce:
1.create 7 vm's + (2X disks) each
2.create templates from all vm's at the same time
3.restart vdsm daemon 

Actual results:
operation fails,async_tasks are not cleared

Expected results:
operation should fail,async_tasks should be cleared

Additional info:

Comment 1 Omer Frenkel 2014-06-03 07:48:50 UTC
please attach enigne.log ...

Comment 2 Ori Gofen 2014-06-05 11:11:20 UTC
Created attachment 902496 [details]
vdsm+engine logs as requested

please pay attention to task's time of execute,some of the unclear tasks are from older tries.

engine=# SELECT action_type,task_id,started_at  FROM async_tasks;
 action_type |               task_id                |     started_at         
         211 | 2cf0e4c6-9e08-4892-ae63-99a8bc96a570 | 2014-06-05 14:00:05.694+03
         211 | 53db65ed-3e93-4fe2-9b06-ec64df17fa4a | 2014-06-05 14:00:05.847+03
         211 | 73e9cc84-2ce4-4b6d-bf54-3a75485c173f | 2014-06-05 14:00:09.31+03
         211 | 7f59fb97-c596-4311-90bd-1e322e885b1d | 2014-06-05 14:00:07.362+03
         211 | 3e0ce088-b2d2-463f-a936-dbf021753c29 | 2014-06-05 14:00:11.167+03
         211 | 0248ece2-db44-41d7-aff6-9e2187ee86cc | 2014-06-05 14:00:13.402+03
         211 | 0a52b2ac-a060-4ccf-8975-822832f2aa69 | 2014-06-02 11:30:15.506+03
         211 | 05d95bee-0afd-40dc-80f3-6bdab279a0a1 | 2014-06-02 11:30:15.505+03
         211 | a20acce1-02fd-4bef-ac3a-598b2349f441 | 2014-06-02 11:30:15.593+03
         211 | fffa8ef2-d89e-4f29-9a3b-28933d6daeac | 2014-06-02 11:30:15.739+03
         211 | 7ca2550a-9e91-416b-adcb-8af2ca4eb648 | 2014-06-02 11:30:16.31+03
         211 | 8c08e5b2-71cf-43b8-a672-4d8b44829242 | 2014-06-02 11:30:16.972+03
         211 | be0fc12b-a4c4-4c0e-bdb0-2b5358698bb4 | 2014-06-02 11:30:18.432+03

Comment 3 Arik 2014-06-17 14:51:05 UTC
The tasks are for remove-image operations on non-existing images:
AddVmTemplate fails => trying to end with failure CreateImageTemplate => call RemoveImage => DeleteImageGroupVDSCommand returns an error that the image doesn't exist
IIUC, in this case there is no task in VDSM for the RemoveImage, thus the task in the engine will not be removed.

Comment 4 Allon Mureinik 2014-06-18 06:38:42 UTC
(In reply to Arik from comment #3)
> IIUC, in this case there is no task in VDSM for the RemoveImage, thus the
> task in the engine will not be removed.
If this is true, it's either a misuse of the existing infra or a bug in the said infra - in any event, it should be fixed.

Comment 5 Liron Aravot 2014-06-19 14:18:58 UTC
The problem here is that a task holder is being persisted in RemoveImage, while getting from vdsm specific errors in task creation like ImageDoesNotExistInDomainError are still considered as success although task has not been created -
In that case, the task placeholder won't be cleared from the async tasks table.

We need to clear the placeholders in the end of each execution regardless to it's success (each flow should decide wether it succeeded or not) to avoid this issue in more flow. We can inspect the removal of the placeholder in remove image regardless (as the placeholders are less useful when creating one task) although we might use it for other benefits si i prefer to leave it there in the meanwhile.

Comment 6 Allon Mureinik 2014-06-19 14:20:51 UTC
Oved/Ravi - the provided patch handles this on an infra level - your feedback would be appreciated.

Comment 7 Ori Gofen 2014-07-29 07:38:12 UTC
is this fixed on oVirt beta.2 also?
or should we verify only on the downstream build?

Comment 8 Eyal Edri 2014-07-29 07:45:36 UTC
as long as it's not a downstream fix only, which it isn't as you can see the fix was done on upstream ovirt, you can continue to verify on upstream beta.
downstream build was very initial and doesn't contain all components.
was done mostly for build purpose.

Comment 9 Ori Gofen 2014-07-29 09:30:52 UTC
Created attachment 922091 [details]
vdsm+engine logs

bug reproduced on beta.2

engine=# SELECT task_id,action_type,status,vdsm_task_id from async_tasks;
               task_id                | action_type | status |             vdsm_task_id             
 7b55facf-f955-487c-975f-b6a64a98ec80 |         201 |      2 | 00000000-0000-0000-0000-000000000000
 23df9612-b7f6-45a3-b21f-0ea82c26bce7 |         201 |      2 | 00000000-0000-0000-0000-000000000000
 8b1ea5f2-38ea-4135-8e11-15c75adaf521 |         201 |      2 | 00000000-0000-0000-0000-000000000000
(3 rows)

Comment 10 Ori Gofen 2014-08-03 15:49:18 UTC
after further investigation,psql async_tasks isn't cleared due to different bugs which do not affect this one.

we opened BZ #1126204 , BZ #1126205 to monitor current behavior.

moving this bug to be verified on beta.2

Comment 11 Allon Mureinik 2015-02-16 19:13:26 UTC
RHEV-M 3.5.0 has been released, closing this bug.

Comment 12 Allon Mureinik 2015-02-16 19:13:26 UTC
RHEV-M 3.5.0 has been released, closing this bug.

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