Grafana error 464 malformed header

Grafana
, ,
1

Hi,

Recently I’ve been having this error just as I open the Tempo data source inside Grafana Cloud:

Query error
rpc error: code = Unknown desc = unexpected HTTP status code received from server: 464 (); malformed header: missing HTTP content-type

This is how I have my data source configuration.
image
Also, I haven’t seen any error from the Tempo gateway

Does anyone know what can be happening?

2

Remove that explicit content type header, that’s not needed usually

3

I removed but the error is still happening. However, the query works when I refresh the page in my browser but if I press the Run query button, it immediately happens

4

After some research, I enabled the configuration to stream over HTTP and it solved the issue.
This can be done by setting the following for my Tempo instance (I use the Helm chart version 1.9.1):

tempo:
    structuredConfig:
       stream_over_http_enabled: true