### Added
- Add `go.opentelemetry.io/otel/sdk/metric/exemplar` package which
includes `Exemplar`, `Filter`, `TraceBasedFilter`, `AlwaysOnFilter`,
`HistogramReservoir`, `FixedSizeReservoir`, `Reservoir`, `Value` and
`ValueType` types. These will be used for configuring the exemplar
reservoir for the metrics sdk. (#5747, #5862)
- Add `WithExportBufferSize` option to log batch processor.(#5877)
### Changed
- Enable exemplars by default in `go.opentelemetry.io/otel/sdk/metric`.
Exemplars can be disabled by setting
`OTEL_METRICS_EXEMPLAR_FILTER=always_off` (#5778)
- `Logger.Enabled` in `go.opentelemetry.io/otel/log` now accepts a newly
introduced `EnabledParameters` type instead of `Record`. (#5791)
- `FilterProcessor.Enabled` in
`go.opentelemetry.io/otel/sdk/log/internal/x` now accepts
`EnabledParameters` instead of `Record`. (#5791)
- The `Record` type in `go.opentelemetry.io/otel/log` is no longer
comparable. (#5847)
- Performance improvements for the trace SDK `SetAttributes` method in
`Span`. (#5864)
- Reduce memory allocations for the `Event` and `Link` lists in `Span`.
(#5858)
- Performance improvements for the trace SDK `AddEvent`, `AddLink`,
`RecordError` and `End` methods in `Span`. (#5874)
### Deprecated
- Deprecate all examples under `go.opentelemetry.io/otel/example` as
they are moved to [Contrib
repository](https://github.com/open-telemetry/opentelemetry-go-contrib/tree/main/examples).
(#5854)
### Fixed
- The race condition for multiple `FixedSize` exemplar reservoirs
identified in #5814 is resolved. (#5819)
- Fix log records duplication in case of heterogeneous resource
attributes by correctly mapping each log record to it's resource and
scope. (#5803)
- Fix timer channel drain to avoid hanging on Go 1.23. (#5868)
- Fix delegation for global meter providers, and panic when calling
otel.SetMeterProvider. (#5827)
- Change the `reflect.TypeOf` to use a nil pointer to not allocate on
the heap unless necessary. (#5827)
Good day,
While working on
https://github.com/open-telemetry/opentelemetry-go/pull/5858 I found
some other possible improvements.
This PR:
- Adds an early return to `SetAttributes` when no attributes are
provided.
- Only increases `s.attributes` to guarantee that there is enough space
for elements to be added.
- Fixes and issue where `truncateAttr` was not used when a attribute was
being updated in `addOverCapAttrs`.
Thanks for reviewing and please let me know if any changes are needed.
---------
Co-authored-by: Damien Mathieu <42@dmathieu.com>
The specification calls this filter "TraceBased":
https://github.com/open-telemetry/opentelemetry-specification/blob/main/specification/metrics/sdk.md#tracebased
I don't have a huge preference between the two, but lean towards
TraceBasedFilter to match the specification, and to match our
environment variable configuration (and probably the future file
configuration).
This PR must be merged or closed prior to the v1.31 release, since we
can't change it after the release.
---------
Co-authored-by: Tyler Yahn <MrAlias@users.noreply.github.com>
Part of https://github.com/open-telemetry/opentelemetry-go/issues/5249
This makes all existing types designed to implement the public Exemplar
API public by moving most of `internal/exemplar` to `exemplar`. The only
types that are not being made public are `exemplar.Drop`, and
`exemplar.FilteredReservoir`. Those types are moved to
`internal/aggregate`, and are renamed to `DropReservoir` and
`FilteredExemplarReservoir`.
The following types are made public:
* `exemplar.Exemplar`
* `exemplar.Filter`
* `exemplar.SampledFilter`
* `exemplar.AlwaysOnFilter`
* `exemplar.HistogramReservoir`
* `exemplar.FixedSizeReservoir`
* `exemplar.Reservoir`
* `exemplar.Value`
* `exemplar.ValueType`
Instead of using a global random number generator for all `randRes`,
have each value use its own. This removes the need for locking and
managing concurrent safe access to the global. Also, the field, given
the `Reservoir` type is not concurrent safe and the metric pipeline
guards this, does not need a `sync.Mutex` to guard it.
Supersedes https://github.com/open-telemetry/opentelemetry-go/pull/5815Fix#5814
### Performance Analysis
This change has approximately equivalent performance as the existing
code based on existing benchmarks.
```terminal
goos: linux
goarch: amd64
pkg: go.opentelemetry.io/otel/sdk/metric
cpu: Intel(R) Core(TM) i7-8550U CPU @ 1.80GHz
│ old.txt │ new.txt │
│ sec/op │ sec/op vs base │
Exemplars/Int64Counter/8-8 14.00µ ± 3% 13.44µ ± 4% -3.98% (p=0.001 n=10)
│ old.txt │ new.txt │
│ B/op │ B/op vs base │
Exemplars/Int64Counter/8-8 3.791Ki ± 0% 3.791Ki ± 0% ~ (p=1.000 n=10) ¹
¹ all samples are equal
│ old.txt │ new.txt │
│ allocs/op │ allocs/op vs base │
Exemplars/Int64Counter/8-8 84.00 ± 0% 84.00 ± 0% ~ (p=1.000 n=10) ¹
¹ all samples are equal
```
### Added
- Support `OTEL_EXPORTER_OTLP_LOGS_INSECURE` and
`OTEL_EXPORTER_OTLP_INSECURE` environments in
`go.opentelemetry.io/otel/exporters/otlp/otlplog/otlploggrpc`. (#5739)
- The `WithResource` option for `NewMeterProvider` now merges the
provided resources with the ones from environment variables. (#5773)
- The `WithResource` option for `NewLoggerProvider` now merges the
provided resources with the ones from environment variables. (#5773)
- Add UTF-8 support to `go.opentelemetry.io/otel/exporters/prometheus`.
(#5755)
### Fixed
- Fix memory leak in the global `MeterProvider` when identical
instruments are repeatedly created. (#5754)
- Fix panic instruments creation when setting meter provider. (#5758)
- Fix panic on instruments creation when setting meter provider. (#5758)
- Fix an issue where `SetMeterProvider` in `go.opentelemetry.io/otel`
might miss the delegation for instruments and registries. (#5780)
### Removed
- Drop support for [Go 1.21](https://go.dev/doc/go1.21). (#5736, #5740,
#5800)
### Changes
Disable sanitization when the UTF-8 support is enabled in the Prometheus
library.
### Usage
To enable UTF-8 support for the Prometheus exporter after this change,
set the following in your application:
```golang
import "github.com/prometheus/common/model"
func init() {
model.NameValidationScheme = model.UTF8Validation
}
```
See `exporters/prometheus/testdata/counter_utf8.txt` for an example of
the text exposition format including names/labels with dots.
Closes#5757
This PR fixes an issue where `SetMeterProvider` might miss the
delegation for instruments and registries. This bug brings a concurrent
issue that could possibly make instruments and registries unable to
operate correctly, such as recording, after using the `SetMeterProvider`
method. The data put on these instruments and registries might be lost.
Closes https://github.com/open-telemetry/opentelemetry-go/issues/5719
In this commit I add OTEL_EXPORTER_OTLP_LOGS_INSECURE and
OTEL_EXPORTER_OTLP_INSECURE env options to `otlploggrpc.Exporter`.
Now insecure option is fetched from env endpoint value
(OTEL_EXPORTER_OTLP_LOGS_ENDPOINT/OTEL_EXPORTER_OTLP_ENDPOINT).
According to
[spec](https://opentelemetry.io/docs/specs/otel/protocol/exporter/):
> Insecure: Whether to enable client transport security for the
exporter’s gRPC connection. This option only applies to OTLP/gRPC when
an endpoint is provided without the http or https scheme - OTLP/HTTP
always uses the scheme provided for the endpoint.
So with current behavior we have several problems:
- If default endpoint is used, we can't use insecure connection (with
setting OTEL_EXPORTER_OTLP_INSECURE).
- If endpoint provided with option without scheme (e.g. `WithEndpoint`)
we can't use insecure connection with env settings.
- If endpoint provided with env variable without scheme (e.g.
`//env.endpoint:8080/`) we can't use insecure connection.
This commit fixes this.
The same problem with `otlploghttp.Exporter`, and probably it should be
fixed there too.
I'm open to suggestions on how to fix the current behavior in a more
elegant way.
---------
Co-authored-by: Sam Xie <sam@samxie.me>
Co-authored-by: Damien Mathieu <42@dmathieu.com>
This release is the last to support [Go 1.21]. The next release will
require at least [Go 1.22].
### Added
- Add MacOS ARM64 platform to the compatibility testing suite. (#5577)
- Add `InstrumentationScope` field to `SpanStub` in
`go.opentelemetry.io/otel/sdk/trace/tracetest`, as a replacement for the
deprecated `InstrumentationLibrary`. (#5627)
- Make the initial release of
`go.opentelemetry.io/otel/exporters/otlp/otlplog/otlploggrpc`. This new
module contains an OTLP exporter that transmits log telemetry using
gRPC. This module is unstable and breaking changes may be introduced.
See our [versioning policy](VERSIONING.md) for more information about
these stability guarantees. (#5629)
- Add `Walk` function to `TraceState` in
`go.opentelemetry.io/otel/trace` to iterate all the key-value pairs.
(#5651)
- Bridge the trace state in
`go.opentelemetry.io/otel/bridge/opencensus`. (#5651)
- Zero value of `SimpleProcessor` in `go.opentelemetry.io/otel/sdk/log`
no longer panics. (#5665)
- The `FilterProcessor` interface type is added in
`go.opentelemetry.io/otel/sdk/log/internal/x`. This is an optional and
experimental interface that log `Processor`s can implement to instruct
the `Logger` if a `Record` will be processed or not. It replaces the
existing `Enabled` method that is removed from the `Processor` interface
itself. It does not fall within the scope of the OpenTelemetry Go
versioning and stability [policy](./VERSIONING.md) and it may be changed
in backwards incompatible ways or removed in feature releases. (#5692)
- Support [Go 1.23]. (#5720)
### Changed
- `NewMemberRaw`, `NewKeyProperty` and `NewKeyValuePropertyRaw` in
`go.opentelemetry.io/otel/baggage` allow UTF-8 string in key. (#5132)
- `Processor.OnEmit` in `go.opentelemetry.io/otel/sdk/log` now accepts a
pointer to `Record` instead of a value so that the record modifications
done in a processor are propagated to subsequent registered processors.
(#5636)
- `SimpleProcessor.Enabled` in `go.opentelemetry.io/otel/sdk/log` now
returns `false` if the exporter is `nil`. (#5665)
- Update the concurrency requirements of `Exporter` in
`go.opentelemetry.io/otel/sdk/log`. (#5666)
- `SimpleProcessor` in `go.opentelemetry.io/otel/sdk/log` synchronizes
`OnEmit` calls. (#5666)
- The `Processor` interface in `go.opentelemetry.io/otel/sdk/log` no
longer includes the `Enabled` method. See the `FilterProcessor`
interface type added in `go.opentelemetry.io/otel/sdk/log/internal/x` to
continue providing this functionality. (#5692)
- The `SimpleProcessor` type in `go.opentelemetry.io/otel/sdk/log` is no
longer comparable. (#5693)
- The `BatchProcessor` type in `go.opentelemetry.io/otel/sdk/log` is no
longer comparable. (#5693)
### Fixed
- Correct comments for the priority of the `WithEndpoint` and
`WithEndpointURL` options and their corresponding environment variables
in `go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp`.
(#5584)
- Pass the underlying error rather than a generic retry-able failure in
`go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetrichttp`,
`go.opentelemetry.io/otel/exporters/otlp/otlplog/otlploghttp` and
`go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp`.
(#5541)
- Correct the `Tracer`, `Meter`, and `Logger` names used in
`go.opentelemetry.io/otel/example/dice`. (#5612)
- Correct the `Tracer` names used in
`go.opentelemetry.io/otel/example/namedtracer`. (#5612)
- Correct the `Tracer` name used in
`go.opentelemetry.io/otel/example/opencensus`. (#5612)
- Correct the `Tracer` and `Meter` names used in
`go.opentelemetry.io/otel/example/otel-collector`. (#5612)
- Correct the `Tracer` names used in
`go.opentelemetry.io/otel/example/passthrough`. (#5612)
- Correct the `Meter` name used in
`go.opentelemetry.io/otel/example/prometheus`. (#5612)
- Correct the `Tracer` names used in
`go.opentelemetry.io/otel/example/zipkin`. (#5612)
- Correct comments for the priority of the `WithEndpoint` and
`WithEndpointURL` options and their corresponding environment variables
in `go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetricgrpc`
and `go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetrichttp`.
(#5641)
- Correct comments for the priority of the `WithEndpoint` and
`WithEndpointURL` options and their corresponding environment variables
in `go.opentelemetry.io/otel/exporters/otlp/otlplog/otlploghttp`.
(#5650)
- Stop percent encoding header environment variables in
`go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc`,
`go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp`,
`go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetricgrpc` and
`go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetrichttp`
(#5705)
- Remove invalid environment variable header keys in
`go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc`,
`go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp`,
`go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetricgrpc` and
`go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetrichttp`
(#5705)
### Removed
- The `Enabled` method of the `SimpleProcessor` in
`go.opentelemetry.io/otel/sdk/log` is removed. (#5692)
- The `Enabled` method of the `BatchProcessor` in
`go.opentelemetry.io/otel/sdk/log` is removed. (#5692)
[Go 1.23]: https://go.dev/doc/go1.23
[Go 1.22]: https://go.dev/doc/go1.22
[Go 1.21]: https://go.dev/doc/go1.21
Closes#5425
Our current log `Processor` interface contains more functionality than
the [OTel
spec](https://github.com/open-telemetry/opentelemetry-specification/blob/main/specification/logs/sdk.md#logrecordprocessor-operations).
The additional functionality allows processors to report back to the API
if a Record should be constructed and emitted or not, which is quite
helpful[^1][^2][^3][^4][^5].
This removes the `Enabled` method from the `Processor` type. It adds
this functionality a new optional and experimental `FilterProcessor`
interface type. The logger and provider are updated to check for this
optional interface to be implemented with the configured processors and
uses them to back the `Logger.Enabled` method, preserving existing
functionality.
By making this change:
- The `Processor` interface is now compliant with the OTel spec and does
not contain any additional unspecified behavior.
- All `Processor` implementations are no longer required to implement an
`Enabled` method. The default, when they do not implement this method,
is to assume they are enabled.
### Benchmark
```terminal
goos: linux
goarch: amd64
pkg: go.opentelemetry.io/otel/sdk/log
cpu: Intel(R) Core(TM) i7-8550U CPU @ 1.80GHz
│ old.txt │ new7.txt │
│ sec/op │ sec/op vs base │
LoggerEnabled-8 133.30n ± 3% 32.36n ± 3% -75.72% (p=0.000 n=10)
│ old.txt │ new7.txt │
│ B/op │ B/op vs base │
LoggerEnabled-8 0.000 ± 0% 0.000 ± 0% ~ (p=1.000 n=10) ¹
¹ all samples are equal
│ old.txt │ new7.txt │
│ allocs/op │ allocs/op vs base │
LoggerEnabled-8 0.000 ± 0% 0.000 ± 0% ~ (p=1.000 n=10) ¹
¹ all samples are equal
```
This is a significant performance improvement due to the `Record` no
longer being converted from the API version to the SDK version.
[^1]: https://pkg.go.dev/go.opentelemetry.io/contrib/processors/minsev
[^2]:
https://pkg.go.dev/go.opentelemetry.io/otel/sdk/log#BatchProcessor.Enabled
[^3]:
https://pkg.go.dev/go.opentelemetry.io/otel/sdk/log#SimpleProcessor.Enabled
[^4]:
af75717ac4/bridges/otelslog/handler.go (L206-L211)
[^5]:
d0309ddd8c/bridges/otelzap/core.go (L142-L146)
---------
Co-authored-by: Robert Pająk <pellared@hotmail.com>
Co-authored-by: Sam Xie <sam@samxie.me>
# Summary
This is to fix issue: #5642
The original logic skips copying TraceState when convert Spans between
OTel and OC.
This PR also updated the OTel TraceState to expose the Keys function for
the propagation purpose.
---------
Co-authored-by: Sam Xie <sam@samxie.me>
Bugfix #5623
As stated in the issue, we need to avoid parsing the key and instead
implement a validation check for it. I've added some unit tests to
verify this fix.
However, I noticed a comment at the top of this file:
```
// Code created by gotmpl. DO NOT MODIFY.
// source: internal/shared/otlp/envconfig/envconfig.go.tmpl
```
It seems that `internal/shared/otlp/envconfig/envconfig.go.tmpl` is the
source template for this file. Since this template matches
`exporters/otlp/otlptrace/otlptracegrpc/internal/envconfig/envconfig.go`,
I updated the template to maintain consistency. I’m not entirely sure if
this approach is correct, so please confirm if this is the right course
of action.
---------
Co-authored-by: Fools <54661071+Charlie-lizhihan@users.noreply.github.com>
Co-authored-by: Damien Mathieu <42@dmathieu.com>
Co-authored-by: Robert Pająk <pellared@hotmail.com>
Co-authored-by: Chester Cheung <cheung.zhy.csu@gmail.com>
Co-authored-by: Tyler Yahn <MrAlias@users.noreply.github.com>
Go 1.23 was released a few days ago.
https://go.dev/blog/go1.23
This also upgrades golangci-lint (and fixes new issues), since it
appears 1.59 doesn't work nicely with Go 1.23.
---------
Co-authored-by: Sam Xie <sam@samxie.me>
Ensure the `Record` and `Provider` continue to be non-comparable.
Restrict `BatchProcessor` and `SimpleProcessor` to be non-comparable.
There is no obvious reason an end-user will need to compare these types,
and we want to keep the possibility of changing the internals without
changing this behavior.
if comparability is required by end-users in the future we can add
`Equal(other T)` methods in the future.
From
https://github.com/open-telemetry/opentelemetry-specification/blob/main/specification/logs/sdk.md#export:
> `Export` will never be called concurrently for the same exporter
instance.
From our SDK perspective this change will make
https://pkg.go.dev/go.opentelemetry.io/otel/exporters/stdout/stdoutlog
concurrent-safe when used with the simple processor. Before the change,
there can be multiple goroutines calling `Write` in parallel (via
`json.Encoder.Encode`).
### Remarks
[Maybe we should simply state that "whole" exporter implementation does
not need to be
concurrent-safe?](https://github.com/open-telemetry/opentelemetry-specification/pull/4173#discussion_r1699958752)
However:
1. we would need to make complex changes in `BatchExporter` to
synchronize the `Export`, `Shutdown`, `ForceFlush` calls
2. we would need to update all exporters (remove synchronization) and
simple exporter (add locks to `Shutdown`, `ForceFlush`)
3. I am 100% not sure if this would be compliant with the specification
- I think it would be complaint because we would simply give stronger
safety-measures
We should probably discuss it separately, but I wanted to highlight my
though process.
Even if we decide that simple and batch processors to synchronize all
calls then I would prefer to address it in a separate PR.
Related spec clarification PR:
-
https://github.com/open-telemetry/opentelemetry-specification/pull/4173
Rather than the deprecated InstrumentationLibrary
This is a replacement for
https://github.com/open-telemetry/opentelemetry-go/pull/3104, as after
this, there is no usage of `instrumentation.Library` within the SDK
anymore.
---------
Co-authored-by: Robert Pająk <pellared@hotmail.com>
Co-authored-by: Sam Xie <sam@samxie.me>
Part of #5412
- Use the recommended package name for the instrumentation exemplified
in the repository.
- Use the recommended detection of a `TracerProvider` from passed
context.
resolve#1682
This PR adds a new action in CI to protect released sections in the
changelog from being changed. It compares the released sections in the
changelog from the base branch to the current PR. It fails if a change
happens.
Apply "Unlock Released Changelog" to bypass this check when doing a new
release.
Action result if we changed the unreleased section:
d640deb435
Action result if we changed the released section:
d672de7a54
---
Meaning of `awk '/^\<!-- Released section --\>/ {flag=1} /^\<!--
Released section ended --\>/ {flag=0} flag'`
- `/^\<!-- Released section --\>/ {flag=1}`
- Matches lines starting with `<!-- Released section -->`.
- Sets the flag variable to 1 (starting the printing of lines).
- `/^\<!-- Released section ended --\>/ {flag=0}`
- Matches lines starting with `<!-- Released section ended -->`.
- Sets the flag variable to 0.
- So it is ok to change external reference links, like
```md
[Go 1.22]: https://go.dev/doc/go1.22
[Go 1.21]: https://go.dev/doc/go1.21
```
- `flag` lines are printed only when the flag is 1.
---------
Co-authored-by: Robert Pająk <pellared@hotmail.com>
### Added
- The `IsEmpty` method is added to the `Instrument` type in
`go.opentelemetry.io/otel/sdk/metric`.
This method is used to check if an `Instrument` instance is a
zero-value. (#5431)
- Store and provide the emitted `context.Context` in `ScopeRecords` of
`go.opentelemetry.io/otel/sdk/log/logtest`. (#5468)
- The `go.opentelemetry.io/otel/semconv/v1.26.0` package.
The package contains semantic conventions from the `v1.26.0` version of
the OpenTelemetry Semantic Conventions. (#5476)
- The `AssertRecordEqual` method to
`go.opentelemetry.io/otel/log/logtest` to allow comparison of two log
records in tests. (#5499)
- The `WithHeaders` option to
`go.opentelemetry.io/otel/exporters/zipkin` to allow configuring custom
http headers while exporting spans. (#5530)
### Changed
- `Tracer.Start` in `go.opentelemetry.io/otel/trace/noop` no longer
allocates a span for empty span context. (#5457)
- Upgrade `go.opentelemetry.io/otel/semconv/v1.25.0` to
`go.opentelemetry.io/otel/semconv/v1.26.0` in
`go.opentelemetry.io/otel/example/otel-collector`. (#5490)
- Upgrade `go.opentelemetry.io/otel/semconv/v1.25.0` to
`go.opentelemetry.io/otel/semconv/v1.26.0` in
`go.opentelemetry.io/otel/example/zipkin`. (#5490)
- Upgrade `go.opentelemetry.io/otel/semconv/v1.25.0` to
`go.opentelemetry.io/otel/semconv/v1.26.0` in
`go.opentelemetry.io/otel/exporters/zipkin`. (#5490)
- The exporter no longer exports the deprecated "otel.library.name" or
"otel.library.version" attributes.
- Upgrade `go.opentelemetry.io/otel/semconv/v1.25.0` to
`go.opentelemetry.io/otel/semconv/v1.26.0` in
`go.opentelemetry.io/otel/sdk/resource`. (#5490)
- Upgrade `go.opentelemetry.io/otel/semconv/v1.25.0` to
`go.opentelemetry.io/otel/semconv/v1.26.0` in
`go.opentelemetry.io/otel/sdk/trace`. (#5490)
- `SimpleProcessor.OnEmit` in `go.opentelemetry.io/otel/sdk/log` no
longer allocates a slice which makes it possible to have a
zero-allocation log processing using `SimpleProcessor`. (#5493)
- Use non-generic functions in the `Start` method of
`"go.opentelemetry.io/otel/sdk/trace".Trace` to reduce memory
allocation. (#5497)
- `service.instance.id` is populated for a `Resource` created with
`"go.opentelemetry.io/otel/sdk/resource".Default` with a default value
when `OTEL_GO_X_RESOURCE` is set. (#5520)
- Improve performance of metric instruments in
`go.opentelemetry.io/otel/sdk/metric` by removing unnecessary calls to
`time.Now`. (#5545)
### Fixed
- Log a warning to the OpenTelemetry internal logger when a `Record` in
`go.opentelemetry.io/otel/sdk/log` drops an attribute due to a limit
being reached. (#5376)
- Identify the `Tracer` returned from the global `TracerProvider` in
`go.opentelemetry.io/otel/global` with its schema URL. (#5426)
- Identify the `Meter` returned from the global `MeterProvider` in
`go.opentelemetry.io/otel/global` with its schema URL. (#5426)
- Log a warning to the OpenTelemetry internal logger when a `Span` in
`go.opentelemetry.io/otel/sdk/trace` drops an attribute, event, or link
due to a limit being reached. (#5434)
- Document instrument name requirements in
`go.opentelemetry.io/otel/metric`. (#5435)
- Prevent random number generation data-race for experimental rand
exemplars in `go.opentelemetry.io/otel/sdk/metric`. (#5456)
- Fix counting number of dropped attributes of `Record` in
`go.opentelemetry.io/otel/sdk/log`. (#5464)
- Fix panic in baggage creation when a member contains `0x80` char in
key or value. (#5494)
- Correct comments for the priority of the `WithEndpoint` and
`WithEndpointURL` options and their corresponding environment variables
in `go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc`.
(#5508)
- Retry trace and span ID generation if it generated an invalid one in
`go.opentelemetry.io/otel/sdk/trace`. (#5514)
- Fix stale timestamps reported by the last-value aggregation. (#5517)
- Indicate the `Exporter` in
`go.opentelemetry.io/otel/exporters/otlp/otlplog/otlploghttp` must be
created by the `New` method. (#5521)
- Improved performance in all `{Bool,Int64,Float64,String}SliceValue`
functions of `go.opentelemetry.io/attributes` by reducing the number of
allocations. (#5549)
