Set Severity Text = WARN as defined

CHANGELOG.md

@@ -7,6 +7,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## Unreleased
 
+- Fix loglevel warning text
+  ([#3566](https://github.com/open-telemetry/opentelemetry-python/pull/3566))
 - Prometheus Exporter string representation for target_info labels
   ([#3659](https://github.com/open-telemetry/opentelemetry-python/pull/3659))
 - Logs: ObservedTimestamp field is missing in console exporter output

opentelemetry-sdk/src/opentelemetry/sdk/_logs/_internal/__init__.py

@@ -521,12 +521,19 @@ def _translate(self, record: logging.LogRecord) -> LogRecord:
             body = record.msg % record.args
         else:
             body = record.msg
+
+        # related to https://github.com/open-telemetry/opentelemetry-python/issues/3548
+        # Severity Text = WARN as defined in https://github.com/open-telemetry/opentelemetry-specification/blob/main/specification/logs/data-model.md#displaying-severity.
+        level_name = (
+            "WARN" if record.levelname == "WARNING" else record.levelname
+        )
+
         return LogRecord(
             timestamp=timestamp,
             trace_id=span_context.trace_id,
             span_id=span_context.span_id,
             trace_flags=span_context.trace_flags,
-            severity_text=record.levelname,
+            severity_text=level_name,
             severity_number=severity_number,
             body=body,
             resource=self._logger.resource,

opentelemetry-sdk/tests/logs/test_export.py

@@ -67,7 +67,7 @@ def test_simple_log_record_processor_default_level(self):
         self.assertEqual(len(finished_logs), 1)
         warning_log_record = finished_logs[0].log_record
         self.assertEqual(warning_log_record.body, "Something is wrong")
-        self.assertEqual(warning_log_record.severity_text, "WARNING")
+        self.assertEqual(warning_log_record.severity_text, "WARN")
         self.assertEqual(
             warning_log_record.severity_number, SeverityNumber.WARN
         )
@@ -122,7 +122,7 @@ def test_simple_log_record_processor_trace_correlation(self):
         self.assertEqual(len(finished_logs), 1)
         log_record = finished_logs[0].log_record
         self.assertEqual(log_record.body, "Warning message")
-        self.assertEqual(log_record.severity_text, "WARNING")
+        self.assertEqual(log_record.severity_text, "WARN")
         self.assertEqual(log_record.severity_number, SeverityNumber.WARN)
         self.assertEqual(log_record.trace_id, INVALID_SPAN_CONTEXT.trace_id)
         self.assertEqual(log_record.span_id, INVALID_SPAN_CONTEXT.span_id)
@@ -162,7 +162,7 @@ def test_simple_log_record_processor_shutdown(self):
         self.assertEqual(len(finished_logs), 1)
         warning_log_record = finished_logs[0].log_record
         self.assertEqual(warning_log_record.body, "Something is wrong")
-        self.assertEqual(warning_log_record.severity_text, "WARNING")
+        self.assertEqual(warning_log_record.severity_text, "WARN")
         self.assertEqual(
             warning_log_record.severity_number, SeverityNumber.WARN
         )
@@ -192,13 +192,13 @@ def test_simple_log_record_processor_different_msg_types(self):
 
         finished_logs = exporter.get_finished_logs()
         expected = [
-            ("warning message: possible upcoming heatwave", "WARNING"),
+            ("warning message: possible upcoming heatwave", "WARN"),
             ("Very high rise in temperatures across the globe", "ERROR"),
             (
                 "Temperature hits high 420 C in Hyderabad",
                 "CRITICAL",
             ),
-            (["list", "of", "strings"], "WARNING"),
+            (["list", "of", "strings"], "WARN"),
             ({"key": "value"}, "ERROR"),
         ]
         emitted = [
@@ -367,7 +367,7 @@ def test_shutdown(self):
 
         finished_logs = exporter.get_finished_logs()
         expected = [
-            ("warning message: possible upcoming heatwave", "WARNING"),
+            ("warning message: possible upcoming heatwave", "WARN"),
             ("Very high rise in temperatures across the globe", "ERROR"),
             (
                 "Temperature hits high 420 C in Hyderabad",

opentelemetry-sdk/tests/logs/test_multi_log_processor.py

@@ -82,7 +82,7 @@ def test_log_record_processor(self):
             logger.error("Some error message")
 
         expected_list_1 = [
-            ("Brace yourself", "WARNING"),
+            ("Brace yourself", "WARN"),
             ("Some error message", "ERROR"),
         ]
         self.assertEqual(logs_list_1, expected_list_1)
@@ -107,7 +107,7 @@ def _get_multi_log_record_processor(self):
     def make_record(self):
         return LogRecord(
             timestamp=1622300111608942000,
-            severity_text="WARNING",
+            severity_text="WARN",
             severity_number=SeverityNumber.WARN,
             body="Warning message",
         )