Set enable_cleanup_closed=True to drop TLS connections without a shutdown (opensearch-project#468)

* Set enable_cleanup_closed=True to drop TLS connections without a shutdown

AsyncOpenSearch seems to leak TLS connections due to a missing parameter in `aiohttp.TCPConnector`. This causes opensearch-project#172 and was also fixed "upstream" in this issue elastic/elasticsearch-py#1910. 

Signed-off-by: Sandor Nemes <snemes@users.noreply.github.com>

* Update CHANGELOG.md

Signed-off-by: Sandor Nemes <snemes@users.noreply.github.com>

---------

Signed-off-by: Sandor Nemes <snemes@users.noreply.github.com>
Signed-off-by: Daniel (dB.) Doubrovkine <dblock@amazon.com>
Co-authored-by: Daniel (dB.) Doubrovkine <dblock@amazon.com>

Author: snemes

CHANGELOG.md

@@ -25,6 +25,7 @@ Inspired from [Keep a Changelog](https://keepachangelog.com/en/1.0.0/)
 - Use API generator for all APIs ([#551](https://github.com/opensearch-project/opensearch-py/pull/551))
 - Merge `.pyi` type stubs inline ([#563](https://github.com/opensearch-project/opensearch-py/pull/563))
 - Expanded type coverage to benchmarks, samples and tests ([#566](https://github.com/opensearch-project/opensearch-py/pull/566))
+- Defaulted `enable_cleanup_closed=True` in `aiohttp.TCPConnector` to prevent TLS connection leaks ([#468](https://github.com/opensearch-project/opensearch-py/pull/468))
 ### Deprecated
 - Deprecated point-in-time APIs (list_all_point_in_time, create_point_in_time, delete_point_in_time) and Security Client APIs (health_check and update_audit_config) ([#502](https://github.com/opensearch-project/opensearch-py/pull/502))
 ### Removed
@@ -162,4 +163,4 @@ Inspired from [Keep a Changelog](https://keepachangelog.com/en/1.0.0/)
 [2.2.0]: https://github.com/opensearch-project/opensearch-py/compare/v2.1.1...v2.2.0
 [2.3.0]: https://github.com/opensearch-project/opensearch-py/compare/v2.2.0...v2.3.0
 [2.3.1]: https://github.com/opensearch-project/opensearch-py/compare/v2.3.0...v2.3.1
-[2.3.2]: https://github.com/opensearch-project/opensearch-py/compare/v2.3.1...v2.3.2
+[2.3.2]: https://github.com/opensearch-project/opensearch-py/compare/v2.3.1...v2.3.2

opensearchpy/_async/http_aiohttp.py

@@ -376,7 +376,10 @@ async def _create_aiohttp_session(self) -> Any:
             cookie_jar=aiohttp.DummyCookieJar(),
             response_class=OpenSearchClientResponse,
             connector=aiohttp.TCPConnector(
-                limit=self._limit, use_dns_cache=True, ssl=self._ssl_context
+                limit=self._limit,
+                use_dns_cache=True,
+                enable_cleanup_closed=True,
+                ssl=self._ssl_context,
             ),
             trust_env=self._trust_env,
         )