Fix DCD crash in openapi validation if meta_data is null#921
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General information
DCD is crashing in Checkmk 2.5 if there are Hosts with following meta_data:
"meta_data": { "created_at": null, "updated_at": "2026-06-08T08:39:43.296016+00:00", "created_by": null } },This case is happening with hosts created directly with hosts.mk or hosts older than Checkmk 1.6 (werk #7235)
Bug reports
I tried this with Checkmk 2.5.0p3 pro.
All DCD connections are affected (Piggyback and FileConnector tested)
For more logs and informations see SUP-29418
Proposed changes
Target of the fix is to prevent making a timestamp from a not existing value.
There should be no other impact.