prompt: We are currently solving the following issue within our repository. Here is the issue text:
  --- BEGIN ISSUE ---
  opentelemetry-instrument command can cause recursive creation of subprocesses
  **Describe your environment**
  
  Python3.9, linux.
  
  **Steps to reproduce**
  Using `opentelemetry-instrument` with any exporter or instrumentation which invokes a python subprocess **during initialization**. For example, the `opentelemetry-exporter-gcp-trace` exporter may invoke the `gcloud` (written in python) command in a subprocess to get project information and authentication tokens. The subprocess will then try to autoinstrument, creating a recursive loop of subprocesses being created.
  
  **What is the expected behavior?**
  Auto-instrumentation should not apply to subprocesses created in the `initialize()` phase of auto-instrumentation. The `PYTHONPATH` environment variable should have the `sitecustomize.py` dirname stripped out at the beginning of `sitecustomize.py`. This would prevent subprocesses from being autoinstrumented during setup, which can cause a loop.
  
  **What is the actual behavior?**
  `PYTHONPATH` is correctly stripped later on to avoid this https://github.com/open-telemetry/opentelemetry-python-contrib/blob/e9f83e1292b0fe5f3478c9b23f3b5a5508481e68/opentelemetry-instrumentation/src/opentelemetry/instrumentation/auto_instrumentation/sitecustomize.py#L120-L125
  
  However, any subprocesses created in [these lines](https://github.com/open-telemetry/opentelemetry-python-contrib/blob/e9f83e1292b0fe5f3478c9b23f3b5a5508481e68/opentelemetry-instrumentation/src/opentelemetry/instrumentation/auto_instrumentation/sitecustomize.py#L114-L117) will cause a loop.
  
  **Additional context**
  I can write a repro if necessary.
  
  --- END ISSUE ---
  
  Below are some code segments, each from a relevant file. One or more of these files may contain bugs.
  --- BEGIN FILES ---
  Path: `opentelemetry-instrumentation/src/opentelemetry/instrumentation/auto_instrumentation/sitecustomize.py`
  Content:
  ```
  1 # Copyright The OpenTelemetry Authors
  2 #
  3 # Licensed under the Apache License, Version 2.0 (the "License");
  4 # you may not use this file except in compliance with the License.
  5 # You may obtain a copy of the License at
  6 #
  7 #     http://www.apache.org/licenses/LICENSE-2.0
  8 #
  9 # Unless required by applicable law or agreed to in writing, software
  10 # distributed under the License is distributed on an "AS IS" BASIS,
  11 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  12 # See the License for the specific language governing permissions and
  13 # limitations under the License.
  14 
  15 from logging import getLogger
  16 from os import environ
  17 from os.path import abspath, dirname, pathsep
  18 from re import sub
  19 
  20 from pkg_resources import iter_entry_points
  21 
  22 from opentelemetry.instrumentation.dependencies import (
  23     get_dist_dependency_conflicts,
  24 )
  25 from opentelemetry.instrumentation.distro import BaseDistro, DefaultDistro
  26 from opentelemetry.instrumentation.environment_variables import (
  27     OTEL_PYTHON_DISABLED_INSTRUMENTATIONS,
  28 )
  29 from opentelemetry.instrumentation.version import __version__
  30 
  31 logger = getLogger(__name__)
  32 
  33 
  34 def _load_distros() -> BaseDistro:
  35     for entry_point in iter_entry_points("opentelemetry_distro"):
  36         try:
  37             distro = entry_point.load()()
  38             if not isinstance(distro, BaseDistro):
  39                 logger.debug(
  40                     "%s is not an OpenTelemetry Distro. Skipping",
  41                     entry_point.name,
  42                 )
  43                 continue
  44             logger.debug(
  45                 "Distribution %s will be configured", entry_point.name
  46             )
  47             return distro
  48         except Exception as exc:  # pylint: disable=broad-except
  49             logger.exception(
  50                 "Distribution %s configuration failed", entry_point.name
  51             )
  52             raise exc
  53     return DefaultDistro()
  54 
  55 
  56 def _load_instrumentors(distro):
  57     package_to_exclude = environ.get(OTEL_PYTHON_DISABLED_INSTRUMENTATIONS, [])
  58     if isinstance(package_to_exclude, str):
  59         package_to_exclude = package_to_exclude.split(",")
  60         # to handle users entering "requests , flask" or "requests, flask" with spaces
  61         package_to_exclude = [x.strip() for x in package_to_exclude]
  62 
  63     for entry_point in iter_entry_points("opentelemetry_pre_instrument"):
  64         entry_point.load()()
  65 
  66     for entry_point in iter_entry_points("opentelemetry_instrumentor"):
  67         if entry_point.name in package_to_exclude:
  68             logger.debug(
  69                 "Instrumentation skipped for library %s", entry_point.name
  70             )
  71             continue
  72 
  73         try:
  74             conflict = get_dist_dependency_conflicts(entry_point.dist)
  75             if conflict:
  76                 logger.debug(
  77                     "Skipping instrumentation %s: %s",
  78                     entry_point.name,
  79                     conflict,
  80                 )
  81                 continue
  82 
  83             # tell instrumentation to not run dep checks again as we already did it above
  84             distro.load_instrumentor(entry_point, skip_dep_check=True)
  85             logger.debug("Instrumented %s", entry_point.name)
  86         except Exception as exc:  # pylint: disable=broad-except
  87             logger.exception("Instrumenting of %s failed", entry_point.name)
  88             raise exc
  89 
  90     for entry_point in iter_entry_points("opentelemetry_post_instrument"):
  91         entry_point.load()()
  92 
  93 
  94 def _load_configurators():
  95     configured = None
  96     for entry_point in iter_entry_points("opentelemetry_configurator"):
  97         if configured is not None:
  98             logger.warning(
  99                 "Configuration of %s not loaded, %s already loaded",
  100                 entry_point.name,
  101                 configured,
  102             )
  103             continue
  104         try:
  105             entry_point.load()().configure(auto_instrumentation_version=__version__)  # type: ignore
  106             configured = entry_point.name
  107         except Exception as exc:  # pylint: disable=broad-except
  108             logger.exception("Configuration of %s failed", entry_point.name)
  109             raise exc
  110 
  111 
  112 def initialize():
  113     try:
  114         distro = _load_distros()
  115         distro.configure()
  116         _load_configurators()
  117         _load_instrumentors(distro)
  118     except Exception:  # pylint: disable=broad-except
  119         logger.exception("Failed to auto initialize opentelemetry")
  120     finally:
  121         environ["PYTHONPATH"] = sub(
  122             rf"{dirname(abspath(__file__))}{pathsep}?",
  123             "",
  124             environ["PYTHONPATH"],
  125         )
  126 
  127 
  128 initialize()
  129
  ```
  --- END FILES ---
  
  Please first localize the bug based on the issue statement, and then generate a patch according to the `git diff` format fenced by three backticks.
  
  Here is an example:
  
  ```diff
  diff --git a/examples/server_async.py b/examples/server_async.py
  --- a/examples/server_async.py
  +++ b/examples/server_async.py
  @@ -313,4 +313,4 @@
   
   
   if __name__ == "__main__":
  -    asyncio.run(run_async_server("."), debug=True)
  +    asyncio.run(run_async_server(), debug=True)
  diff --git a/examples/server_sync.py b/examples/server_sync.py
  --- a/examples/server_sync.py
  +++ b/examples/server_sync.py
  @@ -313,5 +313,5 @@
   
   
   if __name__ == "__main__":
  -    server = run_sync_server(".")
  +    server = run_sync_server()
       server.shutdown()
  
  ```
  
golden_diff: diff --git a/opentelemetry-instrumentation/src/opentelemetry/instrumentation/auto_instrumentation/sitecustomize.py b/opentelemetry-instrumentation/src/opentelemetry/instrumentation/auto_instrumentation/sitecustomize.py
  --- a/opentelemetry-instrumentation/src/opentelemetry/instrumentation/auto_instrumentation/sitecustomize.py
  +++ b/opentelemetry-instrumentation/src/opentelemetry/instrumentation/auto_instrumentation/sitecustomize.py
  @@ -110,6 +110,13 @@
   
   
   def initialize():
  +    # prevents auto-instrumentation of subprocesses if code execs another python process
  +    environ["PYTHONPATH"] = sub(
  +        rf"{dirname(abspath(__file__))}{pathsep}?",
  +        "",
  +        environ["PYTHONPATH"],
  +    )
  +
       try:
           distro = _load_distros()
           distro.configure()
  @@ -117,12 +124,6 @@
           _load_instrumentors(distro)
       except Exception:  # pylint: disable=broad-except
           logger.exception("Failed to auto initialize opentelemetry")
  -    finally:
  -        environ["PYTHONPATH"] = sub(
  -            rf"{dirname(abspath(__file__))}{pathsep}?",
  -            "",
  -            environ["PYTHONPATH"],
  -        )
   
   
   initialize()
  
verification_info: {"golden_diff": "diff --git a/opentelemetry-instrumentation/src/opentelemetry/instrumentation/auto_instrumentation/sitecustomize.py b/opentelemetry-instrumentation/src/opentelemetry/instrumentation/auto_instrumentation/sitecustomize.py\n--- a/opentelemetry-instrumentation/src/opentelemetry/instrumentation/auto_instrumentation/sitecustomize.py\n+++ b/opentelemetry-instrumentation/src/opentelemetry/instrumentation/auto_instrumentation/sitecustomize.py\n@@ -110,6 +110,13 @@\n \n \n def initialize():\n+    # prevents auto-instrumentation of subprocesses if code execs another python process\n+    environ[\"PYTHONPATH\"] = sub(\n+        rf\"{dirname(abspath(__file__))}{pathsep}?\",\n+        \"\",\n+        environ[\"PYTHONPATH\"],\n+    )\n+\n     try:\n         distro = _load_distros()\n         distro.configure()\n@@ -117,12 +124,6 @@\n         _load_instrumentors(distro)\n     except Exception:  # pylint: disable=broad-except\n         logger.exception(\"Failed to auto initialize opentelemetry\")\n-    finally:\n-        environ[\"PYTHONPATH\"] = sub(\n-            rf\"{dirname(abspath(__file__))}{pathsep}?\",\n-            \"\",\n-            environ[\"PYTHONPATH\"],\n-        )\n \n \n initialize()\n", "issue": "opentelemetry-instrument command can cause recursive creation of subprocesses\n**Describe your environment**\r\n\r\nPython3.9, linux.\r\n\r\n**Steps to reproduce**\r\nUsing `opentelemetry-instrument` with any exporter or instrumentation which invokes a python subprocess **during initialization**. For example, the `opentelemetry-exporter-gcp-trace` exporter may invoke the `gcloud` (written in python) command in a subprocess to get project information and authentication tokens. The subprocess will then try to autoinstrument, creating a recursive loop of subprocesses being created.\r\n\r\n**What is the expected behavior?**\r\nAuto-instrumentation should not apply to subprocesses created in the `initialize()` phase of auto-instrumentation. The `PYTHONPATH` environment variable should have the `sitecustomize.py` dirname stripped out at the beginning of `sitecustomize.py`. This would prevent subprocesses from being autoinstrumented during setup, which can cause a loop.\r\n\r\n**What is the actual behavior?**\r\n`PYTHONPATH` is correctly stripped later on to avoid this https://github.com/open-telemetry/opentelemetry-python-contrib/blob/e9f83e1292b0fe5f3478c9b23f3b5a5508481e68/opentelemetry-instrumentation/src/opentelemetry/instrumentation/auto_instrumentation/sitecustomize.py#L120-L125\r\n\r\nHowever, any subprocesses created in [these lines](https://github.com/open-telemetry/opentelemetry-python-contrib/blob/e9f83e1292b0fe5f3478c9b23f3b5a5508481e68/opentelemetry-instrumentation/src/opentelemetry/instrumentation/auto_instrumentation/sitecustomize.py#L114-L117) will cause a loop.\r\n\r\n**Additional context**\r\nI can write a repro if necessary.\n", "before_files": [{"content": "# Copyright The OpenTelemetry Authors\n#\n# Licensed under the Apache License, Version 2.0 (the \"License\");\n# you may not use this file except in compliance with the License.\n# You may obtain a copy of the License at\n#\n#     http://www.apache.org/licenses/LICENSE-2.0\n#\n# Unless required by applicable law or agreed to in writing, software\n# distributed under the License is distributed on an \"AS IS\" BASIS,\n# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n# See the License for the specific language governing permissions and\n# limitations under the License.\n\nfrom logging import getLogger\nfrom os import environ\nfrom os.path import abspath, dirname, pathsep\nfrom re import sub\n\nfrom pkg_resources import iter_entry_points\n\nfrom opentelemetry.instrumentation.dependencies import (\n    get_dist_dependency_conflicts,\n)\nfrom opentelemetry.instrumentation.distro import BaseDistro, DefaultDistro\nfrom opentelemetry.instrumentation.environment_variables import (\n    OTEL_PYTHON_DISABLED_INSTRUMENTATIONS,\n)\nfrom opentelemetry.instrumentation.version import __version__\n\nlogger = getLogger(__name__)\n\n\ndef _load_distros() -> BaseDistro:\n    for entry_point in iter_entry_points(\"opentelemetry_distro\"):\n        try:\n            distro = entry_point.load()()\n            if not isinstance(distro, BaseDistro):\n                logger.debug(\n                    \"%s is not an OpenTelemetry Distro. Skipping\",\n                    entry_point.name,\n                )\n                continue\n            logger.debug(\n                \"Distribution %s will be configured\", entry_point.name\n            )\n            return distro\n        except Exception as exc:  # pylint: disable=broad-except\n            logger.exception(\n                \"Distribution %s configuration failed\", entry_point.name\n            )\n            raise exc\n    return DefaultDistro()\n\n\ndef _load_instrumentors(distro):\n    package_to_exclude = environ.get(OTEL_PYTHON_DISABLED_INSTRUMENTATIONS, [])\n    if isinstance(package_to_exclude, str):\n        package_to_exclude = package_to_exclude.split(\",\")\n        # to handle users entering \"requests , flask\" or \"requests, flask\" with spaces\n        package_to_exclude = [x.strip() for x in package_to_exclude]\n\n    for entry_point in iter_entry_points(\"opentelemetry_pre_instrument\"):\n        entry_point.load()()\n\n    for entry_point in iter_entry_points(\"opentelemetry_instrumentor\"):\n        if entry_point.name in package_to_exclude:\n            logger.debug(\n                \"Instrumentation skipped for library %s\", entry_point.name\n            )\n            continue\n\n        try:\n            conflict = get_dist_dependency_conflicts(entry_point.dist)\n            if conflict:\n                logger.debug(\n                    \"Skipping instrumentation %s: %s\",\n                    entry_point.name,\n                    conflict,\n                )\n                continue\n\n            # tell instrumentation to not run dep checks again as we already did it above\n            distro.load_instrumentor(entry_point, skip_dep_check=True)\n            logger.debug(\"Instrumented %s\", entry_point.name)\n        except Exception as exc:  # pylint: disable=broad-except\n            logger.exception(\"Instrumenting of %s failed\", entry_point.name)\n            raise exc\n\n    for entry_point in iter_entry_points(\"opentelemetry_post_instrument\"):\n        entry_point.load()()\n\n\ndef _load_configurators():\n    configured = None\n    for entry_point in iter_entry_points(\"opentelemetry_configurator\"):\n        if configured is not None:\n            logger.warning(\n                \"Configuration of %s not loaded, %s already loaded\",\n                entry_point.name,\n                configured,\n            )\n            continue\n        try:\n            entry_point.load()().configure(auto_instrumentation_version=__version__)  # type: ignore\n            configured = entry_point.name\n        except Exception as exc:  # pylint: disable=broad-except\n            logger.exception(\"Configuration of %s failed\", entry_point.name)\n            raise exc\n\n\ndef initialize():\n    try:\n        distro = _load_distros()\n        distro.configure()\n        _load_configurators()\n        _load_instrumentors(distro)\n    except Exception:  # pylint: disable=broad-except\n        logger.exception(\"Failed to auto initialize opentelemetry\")\n    finally:\n        environ[\"PYTHONPATH\"] = sub(\n            rf\"{dirname(abspath(__file__))}{pathsep}?\",\n            \"\",\n            environ[\"PYTHONPATH\"],\n        )\n\n\ninitialize()\n", "path": "opentelemetry-instrumentation/src/opentelemetry/instrumentation/auto_instrumentation/sitecustomize.py"}], "after_files": [{"content": "# Copyright The OpenTelemetry Authors\n#\n# Licensed under the Apache License, Version 2.0 (the \"License\");\n# you may not use this file except in compliance with the License.\n# You may obtain a copy of the License at\n#\n#     http://www.apache.org/licenses/LICENSE-2.0\n#\n# Unless required by applicable law or agreed to in writing, software\n# distributed under the License is distributed on an \"AS IS\" BASIS,\n# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n# See the License for the specific language governing permissions and\n# limitations under the License.\n\nfrom logging import getLogger\nfrom os import environ\nfrom os.path import abspath, dirname, pathsep\nfrom re import sub\n\nfrom pkg_resources import iter_entry_points\n\nfrom opentelemetry.instrumentation.dependencies import (\n    get_dist_dependency_conflicts,\n)\nfrom opentelemetry.instrumentation.distro import BaseDistro, DefaultDistro\nfrom opentelemetry.instrumentation.environment_variables import (\n    OTEL_PYTHON_DISABLED_INSTRUMENTATIONS,\n)\nfrom opentelemetry.instrumentation.version import __version__\n\nlogger = getLogger(__name__)\n\n\ndef _load_distros() -> BaseDistro:\n    for entry_point in iter_entry_points(\"opentelemetry_distro\"):\n        try:\n            distro = entry_point.load()()\n            if not isinstance(distro, BaseDistro):\n                logger.debug(\n                    \"%s is not an OpenTelemetry Distro. Skipping\",\n                    entry_point.name,\n                )\n                continue\n            logger.debug(\n                \"Distribution %s will be configured\", entry_point.name\n            )\n            return distro\n        except Exception as exc:  # pylint: disable=broad-except\n            logger.exception(\n                \"Distribution %s configuration failed\", entry_point.name\n            )\n            raise exc\n    return DefaultDistro()\n\n\ndef _load_instrumentors(distro):\n    package_to_exclude = environ.get(OTEL_PYTHON_DISABLED_INSTRUMENTATIONS, [])\n    if isinstance(package_to_exclude, str):\n        package_to_exclude = package_to_exclude.split(\",\")\n        # to handle users entering \"requests , flask\" or \"requests, flask\" with spaces\n        package_to_exclude = [x.strip() for x in package_to_exclude]\n\n    for entry_point in iter_entry_points(\"opentelemetry_pre_instrument\"):\n        entry_point.load()()\n\n    for entry_point in iter_entry_points(\"opentelemetry_instrumentor\"):\n        if entry_point.name in package_to_exclude:\n            logger.debug(\n                \"Instrumentation skipped for library %s\", entry_point.name\n            )\n            continue\n\n        try:\n            conflict = get_dist_dependency_conflicts(entry_point.dist)\n            if conflict:\n                logger.debug(\n                    \"Skipping instrumentation %s: %s\",\n                    entry_point.name,\n                    conflict,\n                )\n                continue\n\n            # tell instrumentation to not run dep checks again as we already did it above\n            distro.load_instrumentor(entry_point, skip_dep_check=True)\n            logger.debug(\"Instrumented %s\", entry_point.name)\n        except Exception as exc:  # pylint: disable=broad-except\n            logger.exception(\"Instrumenting of %s failed\", entry_point.name)\n            raise exc\n\n    for entry_point in iter_entry_points(\"opentelemetry_post_instrument\"):\n        entry_point.load()()\n\n\ndef _load_configurators():\n    configured = None\n    for entry_point in iter_entry_points(\"opentelemetry_configurator\"):\n        if configured is not None:\n            logger.warning(\n                \"Configuration of %s not loaded, %s already loaded\",\n                entry_point.name,\n                configured,\n            )\n            continue\n        try:\n            entry_point.load()().configure(auto_instrumentation_version=__version__)  # type: ignore\n            configured = entry_point.name\n        except Exception as exc:  # pylint: disable=broad-except\n            logger.exception(\"Configuration of %s failed\", entry_point.name)\n            raise exc\n\n\ndef initialize():\n    # prevents auto-instrumentation of subprocesses if code execs another python process\n    environ[\"PYTHONPATH\"] = sub(\n        rf\"{dirname(abspath(__file__))}{pathsep}?\",\n        \"\",\n        environ[\"PYTHONPATH\"],\n    )\n\n    try:\n        distro = _load_distros()\n        distro.configure()\n        _load_configurators()\n        _load_instrumentors(distro)\n    except Exception:  # pylint: disable=broad-except\n        logger.exception(\"Failed to auto initialize opentelemetry\")\n\n\ninitialize()\n", "path": "opentelemetry-instrumentation/src/opentelemetry/instrumentation/auto_instrumentation/sitecustomize.py"}]}