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The change in #5916 introduced a regression, as we don't check whether the header was written before writing it in Write().
We need to only write if the header wasn't written yet.

Fixes #6053.

@dmathieu dmathieu marked this pull request as ready for review August 27, 2024 13:21
@dmathieu dmathieu requested a review from a team August 27, 2024 13:21
@MrAlias MrAlias added this to the v1.30.0 milestone Aug 29, 2024
@MrAlias MrAlias added the bug Something isn't working label Aug 29, 2024
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codecov bot commented Aug 29, 2024

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 65.5%. Comparing base (b62a80e) to head (d525b53).
Report is 1 commits behind head on main.

Additional details and impacted files

Impacted file tree graph

@@          Coverage Diff          @@
##            main   #6055   +/-   ##
=====================================
  Coverage   65.5%   65.5%           
=====================================
  Files        203     203           
  Lines      12984   12985    +1     
=====================================
+ Hits        8505    8506    +1     
  Misses      4219    4219           
  Partials     260     260           
Files with missing lines Coverage Δ
...p/otelhttp/internal/request/resp_writer_wrapper.go 100.0% <100.0%> (ø)

@MrAlias MrAlias merged commit 54d6916 into open-telemetry:main Aug 29, 2024
BuJo added a commit to synyx/tuwat that referenced this pull request Sep 1, 2024
johnduhart pushed a commit to mdsol/opentelemetry-go-contrib that referenced this pull request Sep 6, 2024
…emetry#6055)

The change in open-telemetry#5916 introduced a regression, as we don't check whether
the header was written before writing it in `Write()`.
We need to only write if the header wasn't written yet.

Fixes open-telemetry#6053.

---------

Co-authored-by: Tyler Yahn <[email protected]>
XSAM added a commit that referenced this pull request Sep 11, 2024
### Added

- Add `NewProducer` to
`go.opentelemetry.io/contrib/instrumentation/runtime`, which allows
collecting the `go.schedule.duration` histogram metric from the Go
runtime. (#5991)
- Add gRPC protocol support for OTLP log exporter in
`go.opentelemetry.io/contrib/exporters/autoexport`. (#6083)

### Removed

- Drop support for [Go 1.21]. (#6046, #6047)

### Fixed

- Superfluous call to `WriteHeader` when flushing after setting a status
code in `go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp`.
(#6074)
- Superfluous call to `WriteHeader` when writing the response body after
setting a status code in
`go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp`. (#6055)

[Go 1.21]: https://go.dev/doc/go1.21

---------

Co-authored-by: Tyler Yahn <[email protected]>
@dmathieu dmathieu deleted the write-header-once branch October 10, 2024 08:32
felipeweb added a commit to funccloud/weaver that referenced this pull request Oct 18, 2024
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Error logs coming for http: superfluous response.WriteHeader call when using otelhttp handler

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