[CRIU] Restore process issue

[Andrei Vagin]

Hi Michael,

Is there only one process? What opened files does it have? You can get
them by this command:

lsof -p PID

Could you send dump and restore logs?

And could you collect a strace for criu restore:

strace -f strace.log -s 256 -f criu restore ...

Thanks,
Andrei

On Mon, Feb 26, 2018 at 02:29:17PM +0800, Michael Sheng Yang Loh wrote:
> Hi,
> 
> I'm trying to dump and restore a process on the same machine using criu. I
> managed to dump the process successfully but am having trouble restoring
> the process.
> 
> The error in the restore log is:
> (00.016370)   2866: sk unix: Opening standalone socket (id 0x6a ino 0x696e
> peer 0)
> (00.016392)   2866: Error (criu/sk-unix.c:1194): sk unix: Can't bind
> socket: No such file or directory
> (00.016395)   2866: sk unix: Reverted working dir
> (00.016399)   2866: Error (criu/files.c:1202): Unable to open fd=18 id=0x6a
> (00.016948)pie: 2550: Task 2866 exited, status= 1
> (00.016985) Error (criu/cr-restore.c:2174): Restoring FAILED.
> 
> =====================================
> Some environment information
> 
> uname -r
> 4.15.4-1.el7.elrepo.x86_64
> 
> sudo /opt/criu/criu-3.7/criu/criu -V
> Version: 3.7
> 
> sudo /opt/criu/criu-3.7/criu/criu check
> Looks good.
> 
> =====================================
> I've taken a look at
> https://criu.org/External_UNIX_socket
> https://github.com/checkpoint-restore/criu/issues/410
> 
> I've tried --evasive-devices --link-remap --skip-in-flight --tcp-close
> options to no avail.
> 
> I've also tried
> criu dump --external unix[26990]
> and
> criu restore --inherit-fd fd[3]:socket:[26990]
> but it fails with 'Error (criu/files.c:1582): Can't fstat inherit fd 3: Bad
> file descriptor'
> 
> Please let me know if you require more information.
> Any help on this issue will be much appreciated!
> 
> Many thanks
> Michael

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