virtualbox.org

Summary
After fresh install of newer OS to fresh disk, copied the Virtual Box directories from old sys disk. All seemed to work; but after some snapshot consolidation, re-entry to the GUI yields inaccessible system. The major question is simply:

(q1) Any advice?

Details follow, along with additional questions.

Context:

New disk. Installed Oracle Linux 7.2 yesterday. Added some packages. Did yum update to 7.3
After reboot, uname -r shows 3.10.0-514.el7.x86_64
Then, did yum install VirtualBox-5.1
Create empty new account with same name and same uid as it was on previous system disk (Oracle Linux 6.something)
Connect old sys disk via usb. cd to old home dir.
```
rsync -aSHAXv VirtualBox\ VMs ~/
```
Start Virtual box: nothing shows up. Oh, right. Exit, and
```
mkdir ~/.Trash; mv ~/.config/VirtualBox/ ~/.Trash
```

back at the old home dir,

cd .config; rsync -aSHAXv VirtualBox ~/.config/

Start: everything looks normal. Start my Windows machine. All seems well. Do many updates.
shut down machine. Snapshot.
Delete the two or three oldest snapshots (via the virtual box GUI). Exit. Restart and:

Symptom:

Code: Select all

The selected virtual machine is inaccessible.  Please inspect the error message shown below and press Refresh button if you want to repeat the accessibility check.

Error in /home/jhenning/VirtualBox VMs/Win7/Win7.vbox (line 9) -- Snapshots present but required Machine/@currentSnapshot attribute is missing.

/home/vbox/vbox-5.1.10/src/VBox/Main/src-server/MachineImpl.cpp[745] (nsresult Machine::i_registeredInit()).
Result Code: NS_ERROR_FAILURE (0x80004005)
Component: MachineWrap
Interface: IMachine {b2547866-a0a1-4391-8b86-6952d82efaa0}

Additional context: (1) spacewatch
While the Virtual Box GUI was doing its work to merge and apply differences for deleted snapshots, I had a terminal window logged in. Notice that I had started with a 'du' command, and did a couple more after each delete completed.

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Linux localhost.localdomain 3.10.0-514.el7.x86_64 #1 SMP Thu Nov 3 17:15:05 PDT 2016 x86_64 x86_64 x86_64 GNU/Linux
$ cd
$ cd VirtualBox\ VMs/
$ df -h .
Filesystem                                             Size  Used Avail Use% Mounted on
/dev/mapper/luks-f8663eec-1543-4532-8bc9-562953ecd029  401G  110G  271G  29% /
$ ls
C:\nppdf32Log\debuglog.txt  JustToLiveCD.zip  ls-dash-lR.txt  OEL6.5Test  OEL6.5test2  OEL6.5test3  Win7
$ cd Win7/
$ find -type f -exec ls -lh {} \;
-rw-------. 1 jhenning jhenning 34G Mar  7  2016 ./Snapshots/{90f8c70b-08ce-4f41-af6f-de9d51f0977a}.vdi
-rw-------. 1 jhenning jhenning 19G Dec  4 12:51 ./Snapshots/{7f3783d1-8677-4051-8bcd-f584a1485bf1}.vdi
-rw-------. 1 jhenning jhenning 2.3G Mar  7  2016 ./Snapshots/{1f3d3727-7b57-45f7-ac86-17519a5294b8}.vdi
-rw-------. 1 jhenning jhenning 37K Dec  4 12:51 ./Win7.vbox-prev
-rw-------. 1 jhenning jhenning 27G Jul 11  2014 ./Win7.vdi
-rw-------. 1 jhenning jhenning 115K Dec  3 21:57 ./Logs/VBox.log.1
-rw-------. 1 jhenning jhenning 104K Sep  7 13:42 ./Logs/VBox.log.2
-rw-------. 1 jhenning jhenning 165K Dec  4 12:51 ./Logs/VBox.log
-rw-------. 1 jhenning jhenning 102K Jul 22 13:30 ./Logs/VBox.log.3
-rw-------. 1 jhenning jhenning 35K Dec  4 12:51 ./Win7.vbox
$ pwd
/home/jhenning/VirtualBox VMs/Win7
$ du -hs .
81G     .
$ du -hs .
65G     .
$ du -hs .
62G     .
$ find -type f -exec ls -lh {} \;
-rw-------. 1 jhenning jhenning 2.0M Dec  4 12:53 ./Snapshots/{c8c5b893-9bc0-4b94-b25b-3b4ae5a7326b}.vdi
-rw-------. 1 jhenning jhenning 19G Dec  4 13:01 ./Snapshots/{7f3783d1-8677-4051-8bcd-f584a1485bf1}.vdi
-rw-------. 1 jhenning jhenning 13K Dec  4 13:13 ./Win7.vbox-prev
-rw-------. 1 jhenning jhenning 44G Dec  4 13:01 ./Win7.vdi
-rw-------. 1 jhenning jhenning 115K Dec  3 21:57 ./Logs/VBox.log.1
-rw-------. 1 jhenning jhenning 104K Sep  7 13:42 ./Logs/VBox.log.2
-rw-------. 1 jhenning jhenning 165K Dec  4 12:51 ./Logs/VBox.log
-rw-------. 1 jhenning jhenning 102K Jul 22 13:30 ./Logs/VBox.log.3
-rw-------. 1 jhenning jhenning 13K Dec  4 13:13 ./Win7.vbox
-rw-------. 1 jhenning jhenning 27K Dec  4 13:07 ./Win7-1.14-linux.vbox
$

Additional context (2) Anything odd about activities?

Up to this point in this note, have tried to stick with stuff I am sure of. Now, though, we get to an attempt to reconstruct via human memory, which is of course not as reliable.

As much as possible, I have attempted to do the work as non-priv'd user 'jhenning', including the above-mentioned rsync commands. Of course, the 'useradd' command was priv'd; and I entered a command verbatim from the manual to add jhenning to the virtual box users group. I do not recall other relevant command line activity.
The Windows machine was started and stopped by the GUI. (When I say "GUI", I mean: use mouse to select Applications / System Tools / Oracle VM Virtual Box; when that comes up, if I click Help / About Virtualbox..., it brings up a window with a logo and the text VirtualBox Graphical User Interface Version 5.1.10 r112026 (Qt5.6.1))
During the session where Windows seemed to be operating normally, it went through a bunch of boots. However, it is possible that it was all one continuous virtual box session, with several hours of active work, including an overnight and a period of a couple hours when I closed the lid of the laptop; it appeared not to mind at all, and resumed in a normal-seeming manner.
Among the very first things that I did after starting the VM was to press 'insert guest additions'. It was slow to respond, so I thought I had not clicked in the correct place; ended up with it inserted twice. Much, much later saw complaints about invalid state due to same media on two drives.
While windows was doing its various updates, it was using a bridged network adapter through my wireless connection. Since I am doing lots of downloads today, I wanted to switch to had wired.
Shut Windows down, do a snapshot, go to settings, add another bridged adapter for the hard wire.
Saw a little warning about invalid state, because of the 2x insertions of guest additions. Went to that settings screen and deleted one of them.
Did the above-mentioned weeding of old snapshots.
Exit entirely from the GUI.
Started the GUI and a little box appeared with some sort of message. Before I could record its contents, it disappeared, and was replaced by what you see at the top.

Current state

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$ 
$ pwd
/home/jhenning/VirtualBox VMs/Win7
$ ls -l
total 45849864
drwx------. 2 jhenning jhenning        4096 Dec  3 21:58 Logs
drwx------. 2 jhenning jhenning        4096 Dec  4 13:01 Snapshots
-rw-------. 1 jhenning jhenning       27582 Dec  4 13:07 Win7-1.14-linux.vbox
-rw-------. 1 jhenning jhenning       12391 Dec  4 13:13 Win7.vbox
-rw-------. 1 jhenning jhenning       12555 Dec  4 13:13 Win7.vbox-prev
-rw-------. 1 jhenning jhenning 47062188032 Dec  4 13:01 Win7.vdi
$ ls -l Logs
total 492
-rw-------. 1 jhenning jhenning 168178 Dec  4 12:51 VBox.log
-rw-------. 1 jhenning jhenning 117718 Dec  3 21:57 VBox.log.1
-rw-------. 1 jhenning jhenning 105505 Sep  7 13:42 VBox.log.2
-rw-------. 1 jhenning jhenning 104079 Jul 22 13:30 VBox.log.3
$ ls -l Snapshots/
total 19113772
-rw-------. 1 jhenning jhenning 19573768192 Dec  4 13:01 {7f3783d1-8677-4051-8bcd-f584a1485bf1}.vdi
-rw-------. 1 jhenning jhenning     2097152 Dec  4 12:53 {c8c5b893-9bc0-4b94-b25b-3b4ae5a7326b}.vdi

Win7.vbox
The error message complains about line 9.

(q2) Is it possible that I could make it happy just by editing it?
(q3) If so, how?
(q4) Do you need to see the whole thing?

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$ cat -n Win7.vbox | head
     1  <?xml version="1.0"?>
     2  <!--
     3  ** DO NOT EDIT THIS FILE.
     4  ** If you make changes to this file while any VirtualBox related application
     5  ** is running, your changes will be overwritten later, without taking effect.
     6  ** Use VBoxManage or the VirtualBox Manager GUI to make changes.
     7  -->
     8  <VirtualBox xmlns="http://www.virtualbox.org/" version="1.15-linux">
     9    <Machine uuid="{d8bea4c5-195a-4630-9051-2137995c52ea}" name="Win7" OSType="Windows7_64" snapshotFolder="Snapshots" lastStateChange="2016-12-04T18:01:27Z">
    10      <MediaRegistry>
$

Update: VBoxSVC killed by SIGSEGV

For the first time in a couple hours, just turned on privs, and -- oh -- here is a possibly relevant notice! I do not know when it happened compared to my various activities in the GUI, but it could have been during the snapshot consolidation work.

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$ sudo bash
ABRT has detected 1 problem(s). For more info run: abrt-cli list --since 1480817565
#  abrt-cli list --since 1480817565
id d3f35d75064f4df8d8e43e0ba1573033e0209730
reason:         VBoxSVC killed by SIGSEGV
time:           Sun 04 Dec 2016 01:13:51 PM EST
cmdline:        /usr/lib/virtualbox/VBoxSVC --auto-shutdown
package:        VirtualBox-5.1-5.1.10_112026_el7-1
uid:            501 (jhenning)
count:          1
Directory:      /var/spool/abrt/ccpp-2016-12-04-13:13:51-11052

The Autoreporting feature is disabled. Please consider enabling it by issuing
'abrt-auto-reporting enabled' as a user with root privileges
#

(q5) What portions of the following would it be useful to post?

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# pwd
/var/spool/abrt/ccpp-2016-12-04-13:13:51-11052
# ls
abrt_version    dso_list         limits      pkg_epoch        runlevel
analyzer        environ          machineid   pkg_fingerprint  sosreport.tar.xz
architecture    event_log        maps        pkg_name         time
cgroup          executable       open_fds    pkg_release      type
cmdline         exploitable      os_info     pkg_vendor       uid
component       global_pid       os_release  pkg_version      username
core_backtrace  hostname         package     proc_pid_status  uuid
coredump        kernel           pid         pwd              var_log_messages
count           last_occurrence  pkg_arch    reason
#

I suppose the following might be among the most useful?

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# grep function_name core_backtrace | head -15 | tr -s ' '
 , "function_name": "Machine::i_prepareSaveSettings(bool*)"
 , "function_name": "Machine::i_saveSettings(bool*, int)"
 , "function_name": "VirtualBox::i_saveModifiedRegistries()"
 , "function_name": "Medium::i_close(AutoCaller&)"
 , "function_name": "VirtualBox::i_unregisterMachineMedia(com::Guid const&)"
 , "function_name": "Machine::i_registeredInit()"
 , "function_name": "Machine::getAccessible(int*)"
 , "function_name": "MachineWrap::GetAccessible(int*)"
 , "function_name": "VBoxNsxpXPTC_InvokeByIndex"
 , "function_name": "ipcDConnectService::OnInvoke(unsigned int, DConnectInvoke const*, unsigned int)"
 , "function_name": "ipcDConnectService::OnIncomingRequest(unsigned int, DConnectOp const*, unsigned int)"
 , "function_name": "DConnectWorker::Run()"
 , "function_name": "nsThread::Main(void*)"
 , "function_name": "_pt_iprt_root"
 , "function_name": "rtThreadMain"
# 
# head -20 core_backtrace 
{   "signal": 11
,   "executable": "/usr/lib/virtualbox/VBoxSVC"
,   "stacktrace":
      [ {   "crash_thread": true
        ,   "frames":
              [ {   "address": 5821408
                ,   "build_id": "a1d22c8b9400bdfa759969dc0fe3a6f824191df5"
                ,   "build_id_offset": 1627104
                ,   "file_name": "/usr/lib/virtualbox/VBoxSVC"
                }
              , {   "address": 4921197
                ,   "build_id": "a1d22c8b9400bdfa759969dc0fe3a6f824191df5"
                ,   "build_id_offset": 726893
                ,   "function_name": "Machine::i_prepareSaveSettings(bool*)"
                ,   "file_name": "/usr/lib/virtualbox/VBoxSVC"
                }
              , {   "address": 5082208
                ,   "build_id": "a1d22c8b9400bdfa759969dc0fe3a6f824191df5"
                ,   "build_id_offset": 887904
                ,   "function_name": "Machine::i_saveSettings(bool*, int)"

Will upload all of core_backtrace in a moment.

attaching core_backtrace.

virtualbox.org

inaccessible: snapshots present, required attribute missing

inaccessible: snapshots present, required attribute missing

Re: inaccessible: snapshots present, required attribute missing

Re: inaccessible: snapshots present, required attribute missing