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64 lines
1.8 KiB
Python
64 lines
1.8 KiB
Python
"""
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Patch for OpenTelemetry context detach method to handle None tokens gracefully.
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This patch addresses the issue where OpenTelemetry's context.detach() method raises a TypeError
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when called with a None token. The error occurs in the contextvars_context.py file where it tries
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to call reset() on a None token.
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Related GitHub issue: https://github.com/langgenius/dify/issues/18496
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Error being fixed:
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```
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Traceback (most recent call last):
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File "opentelemetry/context/__init__.py", line 154, in detach
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_RUNTIME_CONTEXT.detach(token)
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File "opentelemetry/context/contextvars_context.py", line 50, in detach
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self._current_context.reset(token) # type: ignore
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^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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TypeError: expected an instance of Token, got None
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```
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Instead of modifying the third-party package directly, this patch monkey-patches the
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context.detach method to gracefully handle None tokens.
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"""
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import logging
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from functools import wraps
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from opentelemetry import context
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logger = logging.getLogger(__name__)
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# Store the original detach method
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original_detach = context.detach
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# Create a patched version that handles None tokens
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@wraps(original_detach)
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def patched_detach(token):
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"""
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A patched version of context.detach that handles None tokens gracefully.
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"""
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if token is None:
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logger.debug("Attempted to detach a None token, skipping")
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return
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return original_detach(token)
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def is_enabled():
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"""
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Check if the extension is enabled.
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Always enable this patch to prevent errors even when OpenTelemetry is disabled.
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"""
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return True
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def init_app(app):
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"""
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Initialize the OpenTelemetry context patch.
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"""
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# Replace the original detach method with our patched version
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context.detach = patched_detach
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logger.info("OpenTelemetry context.detach patched to handle None tokens")
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