bugfix(exporter): ensure response is closed

CHANGELOG.md

@@ -17,6 +17,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
   ([#4494](https://github.com/open-telemetry/opentelemetry-python/pull/4494))
 - Improve CI by cancelling stale runs and setting timeouts
   ([#4498](https://github.com/open-telemetry/opentelemetry-python/pull/4498))
+- Fix intermittent `Connection aborted` error when using otlp/http exporters
+  ([#4477](https://github.com/open-telemetry/opentelemetry-python/pull/4477))
 
 ## Version 1.31.0/0.52b0 (2025-03-12)
 

exporter/opentelemetry-exporter-otlp-proto-http/src/opentelemetry/exporter/otlp/proto/http/_log_exporter/__init__.py

@@ -21,6 +21,7 @@
 from typing import Dict, Optional, Sequence
 
 import requests
+from requests.exceptions import ConnectionError
 
 from opentelemetry.exporter.otlp.proto.common._internal import (
     _create_exp_backoff_generator,
@@ -133,13 +134,27 @@ def _export(self, serialized_data: bytes):
         elif self._compression == Compression.Deflate:
             data = zlib.compress(serialized_data)
 
-        return self._session.post(
-            url=self._endpoint,
-            data=data,
-            verify=self._certificate_file,
-            timeout=self._timeout,
-            cert=self._client_cert,
-        )
+        # By default, keep-alive is enabled in Session's request
+        # headers. Backends may choose to close the connection
+        # while a post happens which causes an unhandled
+        # exception. This try/except will retry the post on such exceptions
+        try:
+            resp = self._session.post(
+                url=self._endpoint,
+                data=data,
+                verify=self._certificate_file,
+                timeout=self._timeout,
+                cert=self._client_cert,
+            )
+        except ConnectionError:
+            resp = self._session.post(
+                url=self._endpoint,
+                data=data,
+                verify=self._certificate_file,
+                timeout=self._timeout,
+                cert=self._client_cert,
+            )
+        return resp
 
     @staticmethod
     def _retryable(resp: requests.Response) -> bool:

exporter/opentelemetry-exporter-otlp-proto-http/src/opentelemetry/exporter/otlp/proto/http/metric_exporter/__init__.py

@@ -29,6 +29,7 @@
 
 import requests
 from deprecated import deprecated
+from requests.exceptions import ConnectionError
 
 from opentelemetry.exporter.otlp.proto.common._internal import (
     _create_exp_backoff_generator,
@@ -175,13 +176,27 @@ def _export(self, serialized_data: bytes):
         elif self._compression == Compression.Deflate:
             data = zlib.compress(serialized_data)
 
-        return self._session.post(
-            url=self._endpoint,
-            data=data,
-            verify=self._certificate_file,
-            timeout=self._timeout,
-            cert=self._client_cert,
-        )
+        # By default, keep-alive is enabled in Session's request
+        # headers. Backends may choose to close the connection
+        # while a post happens which causes an unhandled
+        # exception. This try/except will retry the post on such exceptions
+        try:
+            resp = self._session.post(
+                url=self._endpoint,
+                data=data,
+                verify=self._certificate_file,
+                timeout=self._timeout,
+                cert=self._client_cert,
+            )
+        except ConnectionError:
+            resp = self._session.post(
+                url=self._endpoint,
+                data=data,
+                verify=self._certificate_file,
+                timeout=self._timeout,
+                cert=self._client_cert,
+            )
+        return resp
 
     @staticmethod
     def _retryable(resp: requests.Response) -> bool:

exporter/opentelemetry-exporter-otlp-proto-http/src/opentelemetry/exporter/otlp/proto/http/trace_exporter/__init__.py

@@ -21,6 +21,7 @@
 from typing import Dict, Optional
 
 import requests
+from requests.exceptions import ConnectionError
 
 from opentelemetry.exporter.otlp.proto.common._internal import (
     _create_exp_backoff_generator,
@@ -130,13 +131,27 @@ def _export(self, serialized_data: bytes):
         elif self._compression == Compression.Deflate:
             data = zlib.compress(serialized_data)
 
-        return self._session.post(
-            url=self._endpoint,
-            data=data,
-            verify=self._certificate_file,
-            timeout=self._timeout,
-            cert=self._client_cert,
-        )
+        # By default, keep-alive is enabled in Session's request
+        # headers. Backends may choose to close the connection
+        # while a post happens which causes an unhandled
+        # exception. This try/except will retry the post on such exceptions
+        try:
+            resp = self._session.post(
+                url=self._endpoint,
+                data=data,
+                verify=self._certificate_file,
+                timeout=self._timeout,
+                cert=self._client_cert,
+            )
+        except ConnectionError:
+            resp = self._session.post(
+                url=self._endpoint,
+                data=data,
+                verify=self._certificate_file,
+                timeout=self._timeout,
+                cert=self._client_cert,
+            )
+        return resp
 
     @staticmethod
     def _retryable(resp: requests.Response) -> bool: