Isilon OneFS 8.0: SyncIQ initial sync fails with CBM_ALREADY_STUBBED errors

When an initial sync of a policy is performed for a policy that contains files with hard links, the policy may fail with an error like the following in the job report:

summary.total.state {token:3} = "failed"
summary.action {token:1} = "sync"
summary.errors.0.msg {token:4} = "(policy name: sync_policy target: 10.11.4.9) SyncIQ
encountered a filesystem error on target cluster. Error at target cluster on node
[isilon-1]:  (null), Local error : Error sending cloudpools data: Lin 1:14b2:5fad is
already stubbed: [error code: CBM_ALREADY_STUBBED] from init
(/b/mnt/src/isilon/lib/isi_cpool_bkup/isi_cbm_file_blobber.cpp:1628) from
isi_file_dsession_create (/b/mnt/src/isilon/lib/isi_cpool_bkup/isi_cpool_bkup.cpp:255) "
summary.job_id {token:2} = "644"

The logs contain a message that is similar:

2016-11-29T18:02:30-05:00 <3.7> isilon-1 isi_migrate[1201]:
secondary[sync_policy:1480460546]: make_hard_link: adsk.jquery.transition.js->114b25faa
analysis_nov30.txt:2016-11-29T18:02:30-05:00 <3.2> isilon-1 isi_migrate[1201]:
secondary[sync_policy:1480460546]: Error sending cloudpools data: Lin 1:14b2:5faa is already
stubbed: [error code: CBM_ALREADY_STUBBED] from init
(/b/mnt/src/isilon/lib/isi_cpool_bkup/isi_cbm_file_blobber.cpp:1628) from
isi_file_dsession_create (/b/mnt/src/isilon/lib/isi_cpool_bkup/isi_cpool_bkup.cpp:255)
from send_error_and_die (/b/mnt/src/isilon/bin/isi_migrate/sworker/sworker.c:3063)