## [9.0.2](https://github.com/redis/go-redis/compare/v9.0.1...v9.0.2) (2023-02-01)
### Features
* upgrade OpenTelemetry, use the new metrics API. ([#2410](https://github.com/redis/go-redis/issues/2410)) ([e29e42c](https://github.com/redis/go-redis/commit/e29e42cde2755ab910d04185025dc43ce6f59c65))
## v9 2023-01-30
### Added
- Added support for [RESP3 ](https://github.com/antirez/RESP3/blob/master/spec.md ) protocol. It was
contributed by @monkey92t who has done the majority of work in this release.
- Added `ContextTimeoutEnabled` option that controls whether the client respects context timeouts
and deadlines. See
[Redis Timeouts ](https://redis.uptrace.dev/guide/go-redis-debugging.html#timeouts ) for details.
- Added `ParseClusterURL` to parse URLs into `ClusterOptions` , for example,
`redis://user:password@localhost:6789?dial_timeout=3&read_timeout=6s&addr=localhost:6790&addr=localhost:6791` .
- Added metrics instrumentation using `redisotel.IstrumentMetrics` . See
[documentation ](https://redis.uptrace.dev/guide/go-redis-monitoring.html )
- Added `redis.HasErrorPrefix` to help working with errors.
### Changed
- Removed asynchronous cancellation based on the context timeout. It was racy in v8 and is
completely gone in v9.
- Reworked hook interface and added `DialHook` .
- Replaced `redisotel.NewTracingHook` with `redisotel.InstrumentTracing` . See
[example ](example/otel ) and
[documentation ](https://redis.uptrace.dev/guide/go-redis-monitoring.html ).
- Replaced `*redis.Z` with `redis.Z` since it is small enough to be passed as value without making
an allocation.
- Renamed the option `MaxConnAge` to `ConnMaxLifetime` .
- Renamed the option `IdleTimeout` to `ConnMaxIdleTime` .
- Removed connection reaper in favor of `MaxIdleConns` .
- Removed `WithContext` since `context.Context` can be passed directly as an arg.
- Removed `Pipeline.Close` since there is no real need to explicitly manage pipeline resources and
it can be safely reused via `sync.Pool` etc. `Pipeline.Discard` is still available if you want to
reset commands for some reason.
- Changed Pipelines to not be thread-safe any more.
### Fixed
- Improved and fixed pipeline retries.
- As usually, added support for more commands and fixed some bugs.
