[Thincrust-devel] Exception imgcreate.errors.MountError: MountError("Failed to unmap partitions for '/dev/loop0'",)???

[Kamesh Jayachandran]

When I start the appliance creation I get the following warning

<snip>
Add primary part at 0 of size 2048
Error: Error informing the kernel about modifications to partition 
/dev/loop0p1 -- Invalid argument.  This means Linux won't know about any 
changes you made to /dev/loop0p1 until you reboot -- so you shouldn't 
mount it or use it in any way before rebooting.
Warning: The kernel was unable to re-read the partition table on 
/dev/loop0 (Invalid argument).  This means Linux won't know anything 
about the modifications you made until you reboot.  You should reboot 
your computer before doing anything with /dev/loop0.
Dev loop0p1: /dev/loop01 -> /dev/mapper/loop0p1
</snip>

But when I continue building the appliance it works successfully if I am 
*not* including the jdk rpm which is 68M in size.

If I include the jdk rpm in my kickstart I get the error I originally 
reported, May be the size of jdk rpm is triggering some 
environmental/application issue.

With regards
Kamesh Jayachandran


On 09/12/2009 07:00 PM, Kamesh Jayachandran wrote:
> Hi All,
>
> I am using appliance creator tool to create the libvirt images.
>
> It was working well all these days(I play with this tool for the past 
> 1 week).
>
> Only since today I get the following *error*
>
> <snip>
> Unmapping /dev/loop0
> device-mapper: remove ioctl failed: Device or resource busy
> Traceback (most recent call last):
>   File "/usr/bin/appliance-creator", line 164, in <module>
>     sys.exit(main())
>   File "/usr/bin/appliance-creator", line 155, in main
>     creator.cleanup()
>   File "/usr/lib/python2.6/site-packages/imgcreate/creator.py", line 
> 573, in cleanup
>     self.unmount()
>   File "/usr/lib/python2.6/site-packages/imgcreate/creator.py", line 
> 551, in unmount
>     self._unmount_instroot()
>   File "/usr/lib/python2.6/site-packages/appcreate/appliance.py", line 
> 292, in _unmount_instroot
>     self.__instloop.cleanup()
>   File "/usr/lib/python2.6/site-packages/appcreate/partitionedfs.py", 
> line 191, in cleanup
>     self.__unmap_partitions()
>   File "/usr/lib/python2.6/site-packages/appcreate/partitionedfs.py", 
> line 174, in __unmap_partitions
>     d['disk'].device)
> imgcreate.errors.MountError: Failed to unmap partitions for '/dev/loop0'
> Removing compat symlinks
> Unmapping /dev/loop0
> device-mapper: remove ioctl failed: Device or resource busy
> Exception imgcreate.errors.MountError: MountError("Failed to unmap 
> partitions for '/dev/loop0'",) in <bound method 
> ApplianceImageCreator.__del__ of 
> <appcreate.appliance.ApplianceImageCreator object at 0x92be24c>> ignored
> </snip>
>
> I retstarted my *box* and ensured *no* mounts on /dev/mapper/loop0p1 
> before starting the image creation.
>
> After this failure I get the following *stale* mount point
>
> <snip from df output>
> /dev/mapper/loop0p1    1968588    661152   1287436  34% 
> /var/tmp/imgcreate-ExJVna/install_root
> </snip>
>
> With regards
> Kamesh Jayachandran
>
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