Queries failing after upgrade to v2.52.0rc0 about prometheus

[baryluk]

Looks like same bug as this:

#14040

Prometheus is returning malformed JSON

[ArthurSens]

Thanks for trying the release candidate so quickly!

Could you please any additional information that could help us debug the problem, e.g. logs from the Prometheus instance that is failing

[swiffer]

Sure, this is what I can see currently in the prometheus log file

ts=2024-04-30T14:09:19.769Z caller=api.go:1769 level=error component=web msg="error writing response" bytesWritten=0 err="write tcp 127.0.0.1:9090->127.0.0.1:43910: write: broken pipe"
ts=2024-04-30T14:09:19.778Z caller=api.go:1769 level=error component=web msg="error writing response" bytesWritten=0 err="write tcp 127.0.0.1:9090->127.0.0.1:43912: write: broken pipe"
ts=2024-04-30T14:09:40.963Z caller=api.go:1769 level=error component=web msg="error writing response" bytesWritten=0 err="write tcp 127.0.0.1:9090->127.0.0.1:37742: write: broken pipe"
ts=2024-04-30T14:09:40.972Z caller=api.go:1769 level=error component=web msg="error writing response" bytesWritten=0 err="write tcp 127.0.0.1:9090->127.0.0.1:37752: write: broken pipe"
ts=2024-04-30T14:09:49.962Z caller=api.go:1769 level=error component=web msg="error writing response" bytesWritten=0 err="write tcp 127.0.0.1:9090->127.0.0.1:43922: write: connection reset by peer"
ts=2024-04-30T14:09:49.980Z caller=api.go:1769 level=error component=web msg="error writing response" bytesWritten=0 err="write tcp 127.0.0.1:9090->127.0.0.1:37768: write: connection reset by peer"

(querying prometheus via grafana)

[GiedriusS]

Is it the same if you send the same query through the Prometheus UI/API? If not, could you paste the error from the HTTP response?

[swiffer]

fixed in https://github.com/prometheus/prometheus/releases/tag/v2.52.0-rc.1