Logs located under /var/log/veeam/Backup/

root@linux:/var/log/veeam/Backup/VM_GRP_UX_AGENT_DAILY_LINUXMW006_0200 – linux/Session_20200515_075014_{53ca5d5c-5fb9-4455-b21e-8580c1d9fc0d} # cat Job.log
[15.05.2020 07:50:26] vmb | [SessionLog][processing] Creating volume snapshot.
[15.05.2020 07:50:38] lpbcore| WARN|Method invocation was not finalized. Method id [1]. Class: [lpbcorelib::interaction::ISnapshotOperation]
[15.05.2020 07:50:38] lpbcore| ERR |Resource deadlock avoided
[15.05.2020 07:50:38] lpbcore| >> |Failed to execute IOCTL_SNAPSHOT_CREATE.
[15.05.2020 07:50:38] lpbcore| >> |–tr:Cannot create snapshot
[15.05.2020 07:50:38] lpbcore| >> |–tr:Failed to create machine snapshot
[15.05.2020 07:50:38] lpbcore| >> |–tr:Failed to finish snapshot creation process.
[15.05.2020 07:50:38] lpbcore| >> |–tr:Failed to execute method [1] for class [lpbcorelib::interaction::proxystub::CSnapshotOperationStub].
[15.05.2020 07:50:38] lpbcore| >> |–tr:Failed to invoke method [1] in class [lpbcorelib::interaction::ISnapshotOperation].
[15.05.2020 07:50:38] lpbcore| >> |An exception was thrown from thread [140159715555072].
[15.05.2020 07:50:38] lpbcore| ERR |Failed to execute thaw script with status: fail.
[15.05.2020 07:50:38] vmb | [SessionLog][error] Failed to create volume snapshot.
[15.05.2020 07:50:38] lpbcore| Taking snapshot. Failed.
[15.05.2020 07:50:38] | Thread finished. Role: ‘Session checker for Job: {98481a6f-28b7-4a82-befa-6b69a61824f3}.’

Checking this page it requests to check the kernel version and package veeamsnap
https://forums.veeam.com/veeam-agent-for-linux-f41/failed-to-create-volume-snapshot-on-centos-t36414.html

root@linux:~ # lsmod | grep veeam
veeamsnap 147050 0

root@linux:~ # rpm -qa | grep veeamsnap
kmod-veeamsnap-3.0.2.1185-1.el7.x86_64
kmod-veeamsnap-3.0.2.1185-2.6.32_131.0.15.el6.x86_64

root@linux:~ # uname -r
3.10.0-1062.9.1.el7.x86_64

• Veeam