Ddtrace

Bug Fixes

- Fix an issue in the heap profiler where it would iterate on the wrong heap allocation tracker.

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Bug Fixes

- Fix JSON encoding error when a `bytes` string is used for span metadata.
- Fix a bug in the heap profiler that could be triggered if more than 2^16 memory items were freed during heap data collection.
- Fix a possible bug in the heap memory profiler that could trigger an overflow when too many allocations were being tracked.
- Pymongo instrumentation raises an AttributeError when `tracer.enabled == False`

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Bug Fixes

- Fix application crash on startup when using `channels >= 3.0`.
- Fix parenting of Redis command spans when using aioredis 1.3. Redis spans should now be correctly attributed as child of any active parent spans.
- Fixes issue with aioredis when empty pool is not available and execute returns a coroutine instead of a future. When patch tries to add callback for the span using add_done_callback function it crashes because this function is only for futures.
- Profiler raises a typing error when `Span.resource` is unicode on Python 2.7.

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Bug Fixes

- Fixes incompatibility of wrapped aioredis pipelines in `async with` statements.
- Escape non-Unicode bytes when decoding aioredis args. This fixes a `UnicodeDecodeError` that can be thrown from the aioredis integration when interacting with binary-encoded data, as is done in channels-redis.
- grpc: ensure grpc.intercept_channel is unpatched properly

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Deprecation Notes

- `ddtrace.sampler.DatadogSampler.default_sampler` property is deprecated and will be removed in 1.0.
- `ddtrace.propagation.utils` has been deprecated and will be removed in version 1.0.

New Features

- Add new environment variables to enable/disable django database and cache instrumentation.

`DD_DJANGO_INSTRUMENT_DATABASES`, `DD_DJANGO_INSTRUMENT_CACHES`

- Add tracing support for the `aioredis` library. Version 1.3+ is fully supported.

- Add django 4.0 support.

- The profiler now automatically injects running greenlets as tasks into the main thread. They can be seen within the wall time profiles.

Bug Fixes

- The thread safety of the custom buffered encoder was fixed in order to eliminate a potential cause of decoding errors of trace payloads (missing trace data) in the agent.
- Fix handling of Python exceptions during trace encoding. The tracer will no longer silently fail to encode invalid span data and instead log an exception.
- Fix error when calling `concurrent.futures.ThreadPoolExecutor.submit` with `fn` keyword argument.
- Configure a writer thread in a child process after forking based on writer configuration from its parent process.
- Only for CI Visibility (`pytest` integration): Fix calculation of pipeline URL for GitHub Actions.

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Bug Fixes

- Fix error when calling `concurrent.futures.ThreadPoolExecutor.submit` with `fn` keyword argument.

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