On Thu, Jan 24, 2019 at 11:28 AM Elad Ben Aharon <ebenahar@redhat.com> wrote:

Thanks!

+Fred Rolland seems like the same issue as reported in https://bugzilla.redhat.com/show_bug.cgi?id=1555116

Seems to be related with time-out issues. Though i did not have any storage issues that could have affected the snapshot procedure, although I am running a replica 2 on 1Gbit network where vm storage resides which is not the fastest and may affect this. Could rebasing the backing-chain to reflect the engine state be a solution for this?

2019-01-24 10:12:08,240+02 ERROR [org.ovirt.engine.core.bll.snapshots.RemoveSnapshotCommand] (default task-544) [416c625f-e57b-46b8-bf74-5b774191fada] Error during ValidateFailure.: java.lang.NullPointerExceptio
n
       at org.ovirt.engine.core.bll.validator.storage.StorageDomainValidator.getTotalSizeForMerge(StorageDomainValidator.java:205) [bll.jar:]
       at org.ovirt.engine.core.bll.validator.storage.StorageDomainValidator.hasSpaceForMerge(StorageDomainValidator.java:241) [bll.jar:]
       at org.ovirt.engine.core.bll.validator.storage.MultipleStorageDomainsValidator.lambda$allDomainsHaveSpaceForMerge$6(MultipleStorageDomainsValidator.java:122) [bll.jar:]
       at java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:193) [rt.jar:1.8.0_191]

On Thu, Jan 24, 2019 at 10:25 AM Alex K <rightkicktech@gmail.com> wrote:

When I get the error the engine.log  logs the attached engine-partial.log.

At vdsm.log at SPM host I don't see any error generated. 

Full logs also attached.

Thanx,

Alex

On Wed, Jan 23, 2019 at 5:53 PM Elad Ben Aharon <ebenahar@redhat.com> wrote:

Hi, 

Can you please provide engine.log and vdsm.log?

On Wed, Jan 23, 2019 at 5:41 PM Alex K <rightkicktech@gmail.com> wrote:

Hi all,

I have ovirt 4.2.7, self-hosted on top gluster, with two servers.

I have a specific VM which has encountered some snapshot issues.

The engine lists 4 snapshots and when trying to delete one of them I get "General command validation failure".

The VM was being backed up periodically by a python script which was creating a snapshot -> clone -> export -> delete clone -> delete snapshot. There were times where the VM was complaining of some illegal snapshots following such backup procedures and I had to delete such illegal snapshots references from the engine DB (following some steps found online), otherwise I would not be able to start the VM if it was shut down. Seems though that this is not a clean process and leaves the underlying image of the VM in an inconsistent state in regards to its snapshots as when checking the backing chain of the image file I get:

b46d8efe-885b-4a68-94ca-e8f437566bee (active VM) ->
b7673dca-6e10-4a0f-9885-1c91b86616af ->
4f636d91-a66c-4d68-8720-d2736a3765df ->
6826cb76-6930-4b53-a9f5-fdeb0e8012ac ->
61eea475-1135-42f4-b8d1-da6112946bac ->
604d84c3-8d5f-4bb6-a2b5-0aea79104e43 ->
1e75898c-9790-4163-ad41-847cfe84db40 ->
cf8707f2-bf1f-4827-8dc2-d7e6ffcc3d43 ->
3f54c98e-07ca-4810-82d8-cbf3964c7ce5 (raw image)

The bold ones are the ones shown at engine GUI. The VM runs normally without issues.

I was thinking if I could use qemu-img commit to consolidate and remove the snapshots that are not referenced from engine anymore. Any ideas from your side?

Thanx,

Alex

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Elad Ben Aharon

ASSOCIATE MANAGER, RHV storage QE

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Elad Ben Aharon

ASSOCIATE MANAGER, RHV storage QE