Prometheus Superfluous Write Header error

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Arvind Konar

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Feb 25, 2020, 4:42:00 PM2/25/20

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Hey folks,

I am seeing a superfluous write header error on one of our Prometheus servers. We operate 2 with both scraping the same targets. We use Thanos in front of those servers. We have some heavy queries that we run for Kafka through grafana dashboards but not sure how to pin point cause.

Current Prometheus version - 2.11.1

Feb 24 21:13:48 pd-prometheus01 prometheus[2241]: level=error ts=2020-02-25T05:13:48.280Z caller=stdlib.go:89 component=web caller="http: superfluous response.WriteHeader call from github.com/opentracing-contrib/go-stdlib/nethttp

I have seen a lot of discussion about this under below thread but not clear what the cause is and which version it is fixed.

Current quick fix has been to restart the prometheus service but we would like to figure out a long term solution. Also, this issue comes back after a few days once restart is completed.

https://github.com/prometheus/statsd_exporter/issues/257