[Xen-API] Error on coalesce in SMLog (XCP 1.6)

[Thomas Plant <blueschtar@xxxxxxxxx>]

Hello.

I found the following errors in the SMLog when XCP does a coalesce on a VDI.

Saw this after a LiveStoragMigration. The VM to which the VDI belongs is 
running fine.
Here's the error:
[673] 2013-07-31 11:06:51.531663    Refcount for 
lvm-5d6c04e7-f55c-dce1-81a3-7884a896f1a6:dba43c80-55eb-43c0-bcae-4a4242d7e062 
(1, 0) + (-1, 0) => (0, 0)
[673] 2013-07-31 11:06:51.531718    Refcount for 
lvm-5d6c04e7-f55c-dce1-81a3-7884a896f1a6:dba43c80-55eb-43c0-bcae-4a4242d7e062 
set => (0, 0b)
[673] 2013-07-31 11:06:51.531914    ['/usr/sbin/lvchange', '-an', 
'/dev/VG_XenStorage-5d6c04e7-f55c-dce1-81a3-7884a896f1a6/VHD-dba43c80-55eb-43c0-bcae-4a4242d7e062']
[673] 2013-07-31 11:06:51.651535      pread SUCCESS
[673] 2013-07-31 11:06:51.651684    ['/sbin/dmsetup', 'status', 
'VG_XenStorage--5d6c04e7--f55c--dce1--81a3--7884a896f1a6-VHD--dba43c80--55eb--43c0--bcae--4a4242d7e062']
[673] 2013-07-31 11:06:51.664637      pread SUCCESS
[673] 2013-07-31 11:06:51.664964    lock: released 
/var/lock/sm/lvm-5d6c04e7-f55c-dce1-81a3-7884a896f1a6/dba43c80-55eb-43c0-bcae-4a4242d7e062
[673] 2013-07-31 11:06:51.665080    lock: closed 
/var/lock/sm/lvm-5d6c04e7-f55c-dce1-81a3-7884a896f1a6/dba43c80-55eb-43c0-bcae-4a4242d7e062
[673] 2013-07-31 11:06:51.665293    lock: released 
/var/lock/sm/5d6c04e7-f55c-dce1-81a3-7884a896f1a6/sr
[673] 2013-07-31 11:06:51.666149    SR 5d6c ('iSCSI open-e 0') (26 VDIs 
in 22 VHD trees): no changes
[673] 2013-07-31 11:06:51.674629    Removed leaf-coalesce from 
606278d9[VHD](200.000G//200.398G|a)
[673] 2013-07-31 11:06:51.674907 *~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*
[673] 2013-07-31 11:06:51.674964             ***********************
[673] 2013-07-31 11:06:51.675013             *  E X C E P T I O N  *
[673] 2013-07-31 11:06:51.675061             ***********************
[673] 2013-07-31 11:06:51.675120    leaf-coalesce: EXCEPTION 
util.SMException, Timed out
[673] 2013-07-31 11:06:51.675168      File 
"/opt/xensource/sm/cleanup.py", line 1416, in coalesceLeaf
    self._coalesceLeaf(vdi)
  File "/opt/xensource/sm/cleanup.py", line 1618, in _coalesceLeaf
    return self._liveLeafCoalesce(vdi)
  File "/opt/xensource/sm/cleanup.py", line 2128, in _liveLeafCoalesce
    return SR._liveLeafCoalesce(self, vdi)
  File "/opt/xensource/sm/cleanup.py", line 1666, in _liveLeafCoalesce
    self._doCoalesceLeaf(vdi)
  File "/opt/xensource/sm/cleanup.py", line 1700, in _doCoalesceLeaf
    vdi._coalesceVHD(timeout)
  File "/opt/xensource/sm/cleanup.py", line 675, in _coalesceVHD
    self.sr.uuid, abortTest, VDI.POLL_INTERVAL, timeOut)
  File "/opt/xensource/sm/cleanup.py", line 149, in runAbortable
    raise util.SMException("Timed out")

[673] 2013-07-31 11:06:51.675218 *~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*
[673] 2013-07-31 11:06:51.675269    Leaf-coalesce failed, skipping
[673] 2013-07-31 11:06:51.675351    Starting asynch srUpdate for SR 
5d6c04e7-f55c-dce1-81a3-7884a896f1a6
[11897] 2013-07-31 11:06:51.785049    Setting LVM_DEVICE to 
/dev/disk/by-scsid/23177744e33737371
[11897] 2013-07-31 11:06:51.794086    Setting LVM_DEVICE to 
/dev/disk/by-scsid/23177744e33737371
[11897] 2013-07-31 11:06:51.836874    lock: acquired 
/var/lock/sm/iscsiadm/running
[11897] 2013-07-31 11:06:51.847091    lock: released 
/var/lock/sm/iscsiadm/running
[11897] 2013-07-31 11:06:51.847173    lock: closed 
/var/lock/sm/iscsiadm/running
[11897] 2013-07-31 11:06:51.847687    ['ls', '/sys/class/scsi_host', 
'-1', '--color=never']
[11897] 2013-07-31 11:06:51.855854      pread SUCCESS

I can attach the whole SMLog if required.

Thanks for any hint how I can get rid of this error and let the coalesce 
finish successfully.
Kind regards,
Thomas Plant

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