Export tool data point timestamp is wrong

[merahland]

The environment is in K8S. Export the whole database with this command:

kubectl exec kairosdb-0 -- /opt/kairosdb/bin/kairosdb.sh export

A row of data from export is as follows:

{"name": "somemetrics", 
"tags": {"tag1": "mytag", }, 
"datapoints": [[1677074850000, 0, "long"], [1677075300000, 0, "long"], [1677075750000, 0, "long"], [1677076200000, 0, "long"], [1677076650000, 0, "long"], [1677077100000, 0, "long"], [1677077550000, 0, "long"], [1677078000000, 0, "long"], [1677078450000, 0, "long"], [1677078900000, 0, "long"]]}

For first datapoint, the epoch time of 1677074850000 is Wednesday, February 22, 2023 14:07:30.
But the actual date should be 1st March 2023, 0800.

Another observation is when the data is first inserted, export tool shows the correct timestamp.
However, after 10 or 15 minutes, the exported data will have the wrong timestamp.