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There could be several reasons why InfluxDB is not receiving any data from Telegraf:

1. Telegraf configuration: Check if the Telegraf configuration file has been correctly set up to send data to InfluxDB. Make sure that the InfluxDB output plugin is enabled, and the correct InfluxDB URL, database and authentication are configured.

2. InfluxDB configuration: Check if InfluxDB is configured to listen for incoming data from Telegraf. Make sure that the InfluxDB network configuration is enabled and set up to listen on the correct host and port.

3. Firewall settings: Check if any firewalls between Telegraf and InfluxDB are blocking the connection. Make sure that the necessary ports are open on both sides.

4. Data format: Check if the data format being sent by Telegraf is correct for InfluxDB to accept it. Make sure that data is being sent in proper line protocol format.

5. Troubleshooting: Enable debug logging in both Telegraf and InfluxDB to get more visibility into what might be causing the issue.

It is important to note that checking and verifying each of the above aspects can help isolate and resolve the issue.