Backups are intermittently failing with the above error. Symptoms include random failures on different virtual machines, particularly on a backup job where multiple virtual machines are being backed up.
It is possible that there is a storage issue in your environment. You can investigate if there is a storage performance issue by using ESXTOP. The following VMware knowledgebase article, desrcibes how to do this in detail.
Lower the number of VMs being backed up at the same time. To do this navigate to vRanger GUI, then Tools | Options | My Jobs | Configuration.
In the Resource Management Window find the parameter 'Maximum number of tasks running locally (1 - 20)', decrement this value by 1 and run the job again. Keep lowering this value until the error has stopped. If this is the case, then a storage performance issue is at play here.
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