A migration fails after you select the Objects To Transfer , the following error is being shown:
Error: pmm utility 'migration_handler' raised an exception. Error code is: -9
See pmmcli.log to find out detailed information on this
Out of memory issue. The migration process (
migration-handler in particular) was killed by OOM Killer.
If you have Virtuozzo containers, to make sure that the process was killed by OOM Killer, please check the hardware node logs:
dmesg | egrep -i 'killed process'
To workaround the issue please adjust container's UBC resources , in particular try to increase
kmemsize - size of unswappable memory in bytes, allocated by the operating system kernel.