Insufficient suitable allocatable extents, even though they do exist

[Ron Johnson]

Binary package hint: lvm2

I have a vg with 238464 free PEs. Yet, any attempt to extend it returns the above error message.

# lvm version
  LVM version: 2.02.54(1) (2009-10-26)
  Library version: 1.02.39 (2009-10-26)
  Driver version: 4.17.0

# vgdisplay data_vg
  --- Volume group ---
  VG Name data_vg
  System ID
  Format lvm2
  Metadata Areas 12
  Metadata Sequence No 6
  VG Access read/write
  VG Status resizable
  MAX LV 0
  Cur LV 1
  Open LV 0
  Max PV 0
  Cur PV 12
  Act PV 12
  VG Size 5.46 TiB
  PE Size 8.00 MiB
  Total PE 715392
  Alloc PE / Size 476928 / 3.64 TiB
  Free PE / Size 238464 / 1.82 TiB
  VG UUID NPgp1H-6kkG-c4wL-KNyT-AVoh-Frlb-4nvfiT

root@haggis:~# lvextend -v -l+100%FREE data_vg/data_lv
    Finding volume group data_vg
  Using stripesize of last segment 8.00 MiB
    Archiving volume group "data_vg" metadata (seqno 6).
  Extending logical volume data_lv to 5.46 TiB
  Insufficient suitable allocatable extents for logical volume data_lv: 238464 more required

root@haggis:~# lvextend -v -l+50%FREE data_vg/data_lv
    Finding volume group data_vg
  Using stripesize of last segment 8.00 MiB
    Archiving volume group "data_vg" metadata (seqno 6).
  Extending logical volume data_lv to 4.55 TiB
  Insufficient suitable allocatable extents for logical volume data_lv: 119232 more required

root@haggis:~# lvextend -v -l+10%FREE data_vg/data_lv
    Finding volume group data_vg
  Using stripesize of last segment 8.00 MiB
  Rounding size (500774 extents) down to stripe boundary size for segment (500768 extents)
    Archiving volume group "data_vg" metadata (seqno 6).
  Extending logical volume data_lv to 3.82 TiB
  Insufficient suitable allocatable extents for logical volume data_lv: 23840 more required

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Tamas Papp (tompos)]

The same here with iscsi drives.
Works fine with the switch '-i1' at least with '--test'