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Cyber Backup 12.5 - VM backups failing on 1 out of 4 clusters with GXT error

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I know it's a dead product and upgrading is in our 2023 plan.  

For some reason (possibly following an ESXi upgrade) all VM backups are failing for all machines on 1 cluster within a vCenter instance.   3 other clusters are completing backups without any issue.  

The error reads "GXT: The item provider has skipped the report of an item with key '(0A7D257E-F474-D05A-A2DB-8EB88D9191F2','mms::vm::datastore')'.

Before I realized it was only VMs from a single cluster having issues (vm's from multiple clusters were members of the same plans so I was seeing failures across multiple backup plans), I decided to blow away the entire installation and start from scratch.  When I was rebuilding all my backup plans and groups is when I realized it was all VMs on 1 cluster.  

The only unique thing about this one cluster is that it's a vSAN cluster.  When I was trying to pin down the issue to when it started, it looked like it occurred shortly after an ESXi update.  This cluster had a slightly older ESXi build than the other clusters that were working, so I went ahead and brought it up to as close as I could (slighly ahead due to OEM iso being used) of all the other clusters.  The problem remains.

I attempted to go the route of deploying an Acronis agent to this cluster to facilitate backups, but the same error is received when trying to backup those VMs.  I've exhausted all the articles I can find related to this issue... I'm hoping someone might be willing to lend a hand.  

 

Thanks in advance

 

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Hello Graham,

sorry to know about the issue! 

You write

> I attempted to go the route of deploying an Acronis agent to this cluster to facilitate backups

Does it mean you've already trying configuring the LAN free backup as described in https://www.acronis.com/en-us/support/documentation/AcronisCyberBackup_…

Are the VMs resolved correctly when you create a backup plan?