Introspection Bulk Start Crashes IPMI Device

Issue

When executing the command "openstack baremetal introspection bulk start" , IPMI console got disconnected. ironic-api.log shows errors as below,

2016-07-11 14:22:01.206 29400 ERROR wsme.api [req-c7962111-3ecd-4329-880c-95c07e943e3d ] Server-side error: "IPMI call failed: chassis bootdev pxe.
    raise exception.IPMIFailure(cmd=cmd)
IPMIFailure: IPMI call failed: chassis bootdev pxe.
IPMIFailure_Remote: IPMI call failed: chassis bootdev pxe.
    raise exception.IPMIFailure(cmd=cmd)
IPMIFailure: IPMI call failed: chassis bootdev pxe.
2016-07-11 19:34:41.533 29400 ERROR wsme.api [req-3e3855d7-33de-43ff-af45-467a392924eb ] Server-side error: "IPMI call failed: chassis bootdev pxe.
    raise exception.IPMIFailure(cmd=cmd)
IPMIFailure: IPMI call failed: chassis bootdev pxe.
IPMIFailure_Remote: IPMI call failed: chassis bootdev pxe.
    raise exception.IPMIFailure(cmd=cmd)
IPMIFailure: IPMI call failed: chassis bootdev pxe.
2016-07-11 20:14:15.818 29400 ERROR wsme.api [req-a53defca-e0d8-43f0-8d9b-9df43fd054c4 ] Server-side error: "IPMI call failed: chassis bootdev pxe.
    raise exception.IPMIFailure(cmd=cmd)
IPMIFailure: IPMI call failed: chassis bootdev pxe.
IPMIFailure_Remote: IPMI call failed: chassis bootdev pxe.
    raise exception.IPMIFailure(cmd=cmd)
IPMIFailure: IPMI call failed: chassis bootdev pxe.
2016-07-11 21:00:20.883 29400 ERROR wsme.api [req-68544bc1-d4ca-4ffb-b199-6e167da932ea ] Server-side error: "IPMI call failed: chassis bootdev pxe.
    raise exception.IPMIFailure(cmd=cmd)
IPMIFailure: IPMI call failed: chassis bootdev pxe.
IPMIFailure_Remote: IPMI call failed: chassis bootdev pxe.
    raise exception.IPMIFailure(cmd=cmd)
IPMIFailure: IPMI call failed: chassis bootdev pxe.
2016-07-11 21:00:25.433 29400 ERROR wsme.api [req-29b4d499-3583-4837-841f-1d907dbdcb9b ] Server-side error: "IPMI call failed: chassis bootdev pxe.
    raise exception.IPMIFailure(cmd=cmd)
IPMIFailure: IPMI call failed: chassis bootdev pxe.
IPMIFailure_Remote: IPMI call failed: chassis bootdev pxe.
    raise exception.IPMIFailure(cmd=cmd)
IPMIFailure: IPMI call failed: chassis bootdev pxe.
2016-07-11 21:19:44.756 29400 ERROR wsme.api [req-87a5068b-2b5e-435d-bab5-b5d14dfd70db ] Server-side error: "IPMI call failed: chassis bootdev pxe.
    raise exception.IPMIFailure(cmd=cmd)
IPMIFailure: IPMI call failed: chassis bootdev pxe.
IPMIFailure_Remote: IPMI call failed: chassis bootdev pxe.
    raise exception.IPMIFailure(cmd=cmd)
IPMIFailure: IPMI call failed: chassis bootdev pxe.