Sometimes Traffic router doesn't load latest configuration (cr-config.json)

[stackexpress-jawed]

I'm submitting a ...

• bug report

Traffic Control components affected ...

• Traffic Router

Current behavior:

Sometimes Traffic router doesn't load latest configuration

Traffic router loads the config file from Traffic monitor based on a timestamp of snapshot (config files in JSON format) but sometime it rejects the snapshot due to older timestamp.
Therefore, traffic router does not create DNS records for the new services.

Error Logs

INFO  2021-07-23T07:45:00.589 [AsyncHttpClient-3-21] com.comcast.cdn.traffic_control.traffic_router.core.config.ConfigHandler - Exiting processConfig: Incoming TrConfig snapshot timestamp (1627040665) is older or equal to the loaded timestamp (1627040675); unable to process
WARN  2021-07-23T07:45:00.589 [AsyncHttpClient-3-21] com.comcast.cdn.traffic_control.traffic_router.core.util.PeriodicResourceUpdater - File rejected: /opt/traffic_router/db/cr-config.json

Expected behavior:

• The Traffic router instance should be in sync with Traffic Ops instance
• Always pull lates cr-config.json from Traffic Monitor for any new snapshot.

Minimal reproduction of the problem with instructions:

• Create multiple delivery services one by one at same time and take snapshot after creation of every Delivery service

Anything else:

• Are you queuing the snapshot? If not why TR is not able to pick up the latest snapshot.

[anton-codeit]

@stackexpress-jawed @zrhoffman Hey guys. Any updates here?