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442820aae3
As part of better error handling, remove DM devices that have been sucessfully created but failed to load a table. This can happen when pvmove'ing in a cluster and the cluster mirror daemon is not running on a remote node - the mapping table failing to load as a result. In this case, any revert would work on other nodes running cmirrord because the DM devices on those nodes did succeed in loading. However, because no table was able to load on the non-cmirrord nodes, there is no table present that points to what needs to be reverted. This causes the empty DM device to remain on the system without being present in any LVM representation. This patch should only be considered a partial fix to the overall problem. This is because only the device which failed to load a table is removed. Any LVs that may have been loaded as requirements to the DM device that failed to load may be left in place. Complete clean-up will require tracking those devices which have been created as dependencies and removing them along with the device that failed to load a table.