StructuredLogHandler appends Traceback #382
Description
The StructuredLogHandler appends a Traceback after the json structured log message.
This causes a second unstructured log entry with just the traceback when the handler is used in a Google Cloud Function.
Code example
import logging from google.cloud.logging.handlers import StructuredLogHandler logger = logging.getLogger() logger.handlers.clear() logger.addHandler(StructuredLogHandler()) try: raise Exception("Test") except Exception: logger.exception("Failed")Output
{"message": "Failed\nTraceback (most recent call last):\n File \"main.py\", line 10, in <module>\n raise Exception(\"Test\")\nException: Test", "severity": "ERROR", "logging.googleapis.com/labels": {}, "logging.googleapis.com/trace": "", "logging.googleapis.com/spanId": "", "logging.googleapis.com/sourceLocation": {"line": 12, "file": "main.py", "function": "<module>"}, "httpRequest": {} } Traceback (most recent call last): File "main.py", line 10, in <module> raise Exception("Test") Exception: Test The traceback appears twice. Once inside the structured log message and again after it. This happens because a logging.Formatter is used which always appends the traceback if exc_info or exc_text is present.