have some wrong when add data domain into a data center.

      I can not add a data domain from web panel.

      error log on vdsm server:

      Jan 27 14:49:12 localhost rpc.mountd[3020]: authenticated mount request from 192.168.60.38:730 for /opt/ovirt-node-nfs/data (/opt/ovirt-node-nfs/data)

Jan 27 14:49:12 localhost kernel: device-mapper: table: 253:5: multipath: error getting device

Jan 27 14:49:12 localhost kernel: device-mapper: ioctl: error adding target to table

Jan 27 14:49:12 localhost multipathd: dm-5: remove map (uevent)

Jan 27 14:49:12 localhost multipathd: dm-5: remove map (uevent)

Jan 27 14:49:13 localhost avahi-daemon[1223]: Received response from host 192.168.61.145 with invalid source port 40237 on interface 'ovirtmgmt.0'

Jan 27 14:49:14 localhost kernel: device-mapper: table: 253:5: multipath: error getting device

Jan 27 14:49:14 localhost kernel: device-mapper: ioctl: error adding target to table

Jan 27 14:49:14 localhost multipathd: dm-5: remove map (uevent)

Jan 27 14:49:14 localhost multipathd: dm-5: remove map (uevent)

      [root@localhost etc]# cat multipath.conf 

# RHEV REVISION 1.1

defaults {

    polling_interval        5

    getuid_callout          "/usr/lib/udev/scsi_id --whitelisted --replace-whitespace --device=/dev/%n"

    no_path_retry           fail

    user_friendly_names     no

    flush_on_last_del       yes

    fast_io_fail_tmo        5

    dev_loss_tmo            30

    max_fds                 4096

}

devices {

device {

    vendor                  "HITACHI"

    product                 "DF.*"

    getuid_callout          "/usr/lib/udev/scsi_id --whitelisted --replace-whitespace --device=/dev/%n"

}

device {

    vendor                  "COMPELNT"

    product                 "Compellent Vol"

    no_path_retry           fail

}

device {

    # multipath.conf.default

    vendor                  "DGC"

    product                 ".*"

    product_blacklist       "LUNZ"

    path_grouping_policy    "group_by_prio"

    path_checker            "emc_clariion"

    hardware_handler        "1 emc"

    prio                    "emc"

    failback                immediate

    rr_weight               "uniform"

    # vdsm required configuration

    getuid_callout          "/usr/lib/udev/scsi_id --whitelisted --replace-whitespace --device=/dev/%n"

    features                "0"

    no_path_retry           fail

}

    

     someone can tell me how to fix this issue, thanks