1010

Migration from NAbox 3 to NAbox 4 fails midway

Summary

Migrating data from NAbox 3 o NAbox 4 fails in the middle with a message similar to :

2026/04/24 03:55:21 import process failed: import failed with 10 retries: execution failed after 10 retry attempts
Importing batch failed for timestamps range 1737847793079 - 1739102393078 (enable --verbose output to get more details)

This can be caused by memory issues on the destination host (NAbox 4)

Look for errors like :

Apr 24 03:40:30 nabox02 kernel: vmalert-prod invoked oom-killer: gfp_mask=0x140cca(GFP_HIGHUSER_MOVABLE|__GFP_COMP), order=0, oom_score_adj=0
Apr 24 03:40:30 nabox02 kernel: CPU: 0 UID: 0 PID: 2440 Comm: vmalert-prod Not tainted 6.12.74-flatcar #1
Apr 24 03:40:30 nabox02 kernel: Hardware name: VMware, Inc. VMware Virtual Platform/440BX Desktop Reference Platform, BIOS 6.00 11/12/2020
Apr 24 03:40:30 nabox02 kernel: Call Trace:
Apr 24 03:40:30 nabox02 kernel:  <TASK>
Apr 24 03:40:30 nabox02 kernel:  dump_stack_lvl+0x5a/0x80

in dmesg

oom-killer is the important part

The solution is to increase memory for NAbox 4 VM