Issue

Missing quote on alias in /etc/multipath.conf can result in empty entries in dmsetup

multipath {
   wwid "350002ac005303ac0"
   alias "oracleasm    <----- No ending "
}

Running multipath errors as expected, but dmsetup shows an empty entry

root@localhost:/etc # multipath
350002ac000463ac1: rename mpath7 to
DM message failed [switch_group 1]
: (350002ac000463ac1) 3PARdata,VV
[size=100G][features=0][hwhandler=0][n/a]
\_ round-robin 0 [prio=1][undef]
 \_ 2:0:0:12 sdah 66:16 [active][ready]
 \_ 1:0:0:12 sdm 8:192 [active][ready]
DM message failed [queue_if_no_path]

root@localhost:~ # dmsetup ls
    (253, 71)                 <----- Missing device name
oraclevoteocr_001 (253, 14)
vg01-homelv    (253, 4)
oraclevoteocr_003p1   (253, 36)
oracleasm_005  (253, 25)
oracleasm_004p4   (253, 56)
oracleasm_014p1   (253, 45)