[PCA 2.x / OVM] Unable to Delete a Repository due to "umount device is busy" (Doc ID 2131367.1)

Last updated on JUNE 01, 2024

Applies to:

Symptoms

Deleting a repository fails on 1 server in the server pool
We see errors like the following:

Job Internal Error (Operation)com.oracle.ovm.mgr.api.exception.FailedOperationException: OVMAPI_B000E Storage plugin command
[storage_plugin_unmount] failed for storage server [0004fb0000090000785853c1b1db9aa6] failed with
[com.oracle.ovm.mgr.api.exception.FailedOperationException: OVMAPI_4010E Attempt to send command:
dispatch to server: ovcacn13r1 failed. OVMAPI_4004E Server Failed Command: dispatch
https://?uname?:?pwd?@192.168.140.11:8899/api/3 storage_plugin_unmount oracle.ocfs2.OCFS2.OCFS2Plugin
/OVS/Repositories/0004fb0000030000a77720a05d32bff1 true, Status: OSCPlugin.OperationFailedEx:
'Unable to unmount filesystem "/OVS/Repositories/0004fb0000030000a77720a05d32bff1":
 umount: /OVS/Repositories/0004fb0000030000a77720a05d32bff1: device is busy

However, lsof lists no open files on the mountpoint

losetup -a does list loop devices using the repository:
/dev/loop13: [fc0b]:1871163 (/OVS/Repositories/0004fb0000030000a77720a05d32bff1/VirtualDisk*)
/dev/loop14: [fc0b]:1871162 (/OVS/Repositories/0004fb0000030000a77720a05d32bff1/VirtualDisk*)
/dev/loop16: [fc0b]:1871161 (/OVS/Repositories/0004fb0000030000a77720a05d32bff1/VirtualDisk*)
/dev/loop17: [fc0b]:1871157 (/OVS/Repositories/0004fb0000030000a77720a05d32bff1/VirtualDisk*)
/dev/loop18: [fc0b]:1871159 (/OVS/Repositories/0004fb0000030000a77720a05d32bff1/VirtualDisk*)

Checking which images are in use:
$ for file in `find /OVS/Repositories/0004fb0000030000a77720a05d32bff1/VirtualDisks` ; do USED=`losetup -j $file`; if [ "$USED" != "" ^C; then echo $USED; echo $file; echo ---- ; fi ;done
find: /OVS/Repositories/0004fb0000030000a77720a05d32bff1/VirtualDisks: No such file or directory

-> there are no images in use, the directory doesn't even exist

Cause

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