Ceph - Upgrading from Red Hat Ceph Storage 1.3.0 (Hammer - 0.94.1) to Red Hat Ceph Storage 2.0 (Jewel - 10.2.2) OSDs are not coming up, why?

Issue

• Ceph - Upgrading from Red Hat Ceph Storage 1.3.0 (Hammer - 0.94.1) to Red Hat Ceph Storage 2.0 (Jewel - 10.2.2) OSDs are not coming up, why?

• ceph osd tree output -

# ceph osd tree
ID WEIGHT  TYPE NAME            UP/DOWN REWEIGHT PRIMARY-AFFINITY
-1 0.17990 root default
-2 0.05997     host ceph-osd1
 0 0.01999         osd.0             up  1.00000          1.00000
 1 0.01999         osd.1             up  1.00000          1.00000
 2 0.01999         osd.2             up  1.00000          1.00000
-3 0.05997     host ceph-osd2
 3 0.01999         osd.3           down  1.00000          1.00000
 4 0.01999         osd.4           down  1.00000          1.00000
 5 0.01999         osd.5           down  1.00000          1.00000
-4 0.05997     host ceph-osd3
 6 0.01999         osd.6             up  1.00000          1.00000
 7 0.01999         osd.7             up  1.00000          1.00000
 8 0.01999         osd.8             up  1.00000          1.00000

• OSD process stuck in boot

2016-11-16 22:16:37.489568 7f0785c19800  0 osd.4 13239 load_pgs opened 38 pgs
2016-11-16 22:16:37.489592 7f0785c19800  0 osd.4 13239 using 0 op queue with priority op cut off at 64.
2016-11-16 22:16:37.490601 7f0785c19800 -1 osd.4 13239 log_to_monitors {default=true}
2016-11-16 22:16:37.503848 7f0785c19800  0 osd.4 13239 done with init, starting boot process