Device: \\1.2.3.4.:Port:/backupVM
Options: vers=4,nconnect=16,noauto,x-systemd.automount,x-systemd.device-timeout=10,x-systemd.idle-timeout=1min

I tried mounting and backing up with the same settings and didn't notice anything special. The changes in the update only concerned the case where a port number was entered.

The NFS mount is done correctly and the error only occurs at the time of backup, is that it?

@Tristis-Oris said in The "paths[1]" argument must be of type string. Received undefined:

@xen-orchestra/fs/dist/abstract.js:412

Hi @Tristis-Oris

Can you show the settings you used for your NFS mount?

@flakpyro said in CBT: the thread to centralize your feedback:

This is a completely different 5 host pool backed by a Pure storage array with SRs mounted via NFSv3, migrating a VM between hosts results in the same issue.

Before migration:
[01:41 xcpng-prd-03 b04d9910-8671-750f-050e-8b55c64fbede]# cbt-util get -c -n 83035854-b5a9-4f7e-869f-abe43ddc658d.cbtlog 
e28065ff-342f-4eae-a910-b91842dd39ca

After migration
[01:41 xcpng-prd-03 b04d9910-8671-750f-050e-8b55c64fbede]# cbt-util get -c -n 83035854-b5a9-4f7e-869f-abe43ddc658d.cbtlog 
00000000-0000-0000-0000-000000000000

I dont think i have anything "custom" running that would be causing this so no idea why this is happening but its happening on multiple pools for us.

This is a very interesting clue, and we will investigate it with damien

there is a lot of edges case that can happens ( a lying network/drive/... )
and most of the time , xcp/xapi are self healing, but sometimes XO have to do a little work to cleanup. The CBT should be reset correctly after storage migration.
We'll add the async call to enable/ disable CBT since it could lead to bogus state, and maybe a more in depth cleaning of cbt after a "vdi not related error "

@CJ the fix has been merged and will be available in the next release.

@samuelolavo Shell only handles string values, to pass other types to xo-cli you need to encode them in JSON and use the json: prefix:

xo-cli resourceSet.create name=test-resource subjects=json:'["d301d9ea-9e22-4480-bf40-111111111111"]' objects=json:'["8fb06362-d8fe-598b-f819-11111111111111"]' shareByDefault=json:true

@rtjdamen we found a clue with @Bastien-Nollet : there was a race condition between the timeframe allowed to enable CBT and the snapshot, leading to a snapshot taken before CBT , thus failing to compute correctly the list of changed block at the next backup

The fix is deployed, and we'll see this night. If everything goes well, this night will be a full, but the disks will keep CBT enabled. And the next night, we'll have delta

if everything is ok, it will be released in a second patch ( 5.100.2 )

this branch ( already deployed on @rtjdamen systems) add a better handing of host that took too much time to compute the changed block list :
https://github.com/vatesfr/xen-orchestra/pull/8120

it will be release in patch this week

I am still investigating an error that still occurs occasionally : XapiError: SR_BACKEND_FAILURE_460(, Failed to calculate changed blocks for given VDIs. [opterr=Source and target VDI are unrelated], )

fbeauchamp opened this pull request in vatesfr/xen-orchestra

open fix(@xen-orchestra/xapi): use callSync for VDI_listChangedBlocks #8120

Hi
Indeed. We will see how we can fix this bug.
Thanks

Hi @infecticide, the fix for this issue has been been merged and will be available in the next release (5.100.1)