Snap backup job fails in multipath implementations

Snap backup job fails in multipath implementations because multiple iSCSI sessions are configured to the same IQN (iSCSI Qualified Name)

Symptoms

FileScan.log

31289 b1349720 07/19 18:02:39 204 CVSnapClientAPI::SetJPR() - JPR Set - Error [60610, Failure during recreate VG. Error [Can't find PV [/dev/sdc1], UUID=[br6Spi-QRa3-pCzr-FuXe-FipT-dyME-AEnp1O] in the metadata.] in [LVM_linux_lvm.cpp:837] (MM.60610)] Custom Error [Failure during recreate VG. Error [Can't find PV [/dev/sdc1], UUID=[br6Spi-QRa3-pCzr-FuXe-FipT-dyME-AEnp1O] in the metadata.] in [LVM_linux_lvm.cpp:837]]

Causes

If multiple iSCSI sessions are configured to the same IQN, each map operation produces multiple device nodes, but cleanup will be done for only one device and the clones are removed from the array thus making the device inaccessible. The next snap backup job will try to reuse the bad device and will fail.

Resolution

• Make sure multipaths are configured properly and ensure that there is only one iSCSI session configured to the same IQN.
• Verify if the array you are using supports multipath implementations.