Gracefully error out when there are concurrent profilers

project/tests/test_collector.py

@@ -1,3 +1,6 @@
+import cProfile
+import sys
+
 from django.test import TestCase
 from tests.util import DictStorage
 
@@ -47,6 +50,18 @@ def test_finalise(self):
                 self.assertTrue(content)
                 self.assertGreater(len(content), 0)
 
+    def test_configure_exception(self):
+        other_profiler = cProfile.Profile()
+        other_profiler.enable()
+        collector = DataCollector()
+        collector.configure()
+        other_profiler.disable()
+        if sys.version_info >= (3, 12):
+            self.assertEqual(collector.local.pythonprofiler, None)
+        else:
+            self.assertIsNotNone(collector.local.pythonprofiler)
+            collector.stop_python_profiler()
+
     def test_profile_file_name_with_disabled_extended_file_name(self):
         SilkyConfig().SILKY_PYTHON_PROFILER_EXTENDED_FILE_NAME = False
         request_path = 'normal/uri/'

silk/collector.py

@@ -92,7 +92,13 @@
         self._configure()
         if should_profile:
             self.local.pythonprofiler = cProfile.Profile()
-            self.local.pythonprofiler.enable()
+            try:
+                self.local.pythonprofiler.enable()
+            except ValueError as e:
+                # Deal with cProfile not being allowed to run concurrently
+                # https://github.com/jazzband/django-silk/issues/682
+                Logger.error('Could not enable python profiler, %s' % str(e), exc_info=True)
+                self.local.pythonprofiler = None
 
     def clear(self):
         self.request = None