Backend-ai-agent

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**NEW**

- PUSH/PULL-based kernel interaction protocol to support streaming outputs.
This enables interactive input functions and streaming outputs for long-running codes,
and also makes kernel execution more resilient to network failures.
(ZeroMQ's REQ/REP sockets break the system if any messages get dropped)

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**FIXES**

- Fix a typo that generates errors during GPU kernel initialization.

- Fix regression of '--agent-ip-override' cli option.

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- Minor internal polishing release.

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**CHANGES**

- Bump version to 0.8 to match with sorna-manager and sorna-client.

**FIXES**

- Fix events lost by HTTP connection timeouts when using ``docker.events.run()`` from
aiodocker. (It is due to default 5-minute timeout set by aiohttp)

- Correct task cancellation

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**CHANGES**

- Add new aliases for "git" kernel: "git-shell" and "shell"

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**CHANGES**

- Now it uses `aiodocker`_ instead of `docker-py`_ to
prevent timeouts with many concurrent requests.

NOTE: You need to run ``pip install -r requirements.txt`` to install the
non-pip (GitHub) version of aiodocker correctly, before running
``pip install sorna-agent``.

**FIXES**

- Fix corner-case exceptions in statistics/heartbeats.

.. _aiodocker: https://github.com/achimnol/aiodocker

.. _dockerpy: https://github.com/docker/docker-py