Github user rhtyd commented on the issue:
https://github.com/apache/cloudstack/pull/1656
There are no upgrade tests to confirm the fix as all the changes are in an
older 4.1.0->4.2.0 upgrade path. After this fix, here are manual test results
to show that db upgrade finished cleanly without breaking with foreign key
constraint issue:
> 2016-08-23 13:55:06,886 DEBUG [c.c.u.d.Upgrade410to420] (main:null)
(logid:) Migrating secondary storage to image store
> 2016-08-23 13:55:06,896 DEBUG [c.c.u.d.Upgrade410to420] (main:null)
(logid:) Checking if we need to migrate NFS secondary storage to image store or
staging store
> 2016-08-23 13:55:06,896 DEBUG [c.c.u.d.Upgrade410to420] (main:null)
(logid:) Migrating NFS secondary storage to Image store
> 2016-08-23 13:55:06,921 DEBUG [c.c.u.d.Upgrade410to420] (main:null)
(logid:) Marking NFS secondary storage in host table as removed
> 2016-08-23 13:55:06,934 DEBUG [c.c.u.d.Upgrade410to420] (main:null)
(logid:) Completed migrating secondary storage to image store
> 2016-08-23 13:55:06,934 DEBUG [c.c.u.d.Upgrade410to420] (main:null)
(logid:) Updating volume_store_ref table from volume_host_ref table
> 2016-08-23 13:55:06,957 DEBUG [c.c.u.d.Upgrade410to420] (main:null)
(logid:) Insert modified 22 rows
> 2016-08-23 13:55:06,958 DEBUG [c.c.u.d.Upgrade410to420] (main:null)
(logid:) Update modified 0 rows
> 2016-08-23 13:55:06,958 DEBUG [c.c.u.d.Upgrade410to420] (main:null)
(logid:) Completed updating volume_store_ref table from volume_host_ref table
> 2016-08-23 13:55:06,958 DEBUG [c.c.u.d.Upgrade410to420] (main:null)
(logid:) Updating template_store_ref table from template_host_ref table
> 2016-08-23 13:55:07,445 DEBUG [c.c.u.d.Upgrade410to420] (main:null)
(logid:) Insert modified 6622 rows
> 2016-08-23 13:55:07,479 DEBUG [c.c.u.d.Upgrade410to420] (main:null)
(logid:) Update modified 3666 rows
> 2016-08-23 13:55:07,479 DEBUG [c.c.u.d.Upgrade410to420] (main:null)
(logid:) Completed updating template_store_ref table from template_host_ref
table
> 2016-08-23 13:55:07,479 DEBUG [c.c.u.d.Upgrade410to420] (main:null)
(logid:) Updating snapshot_store_ref table from snapshots table
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