fix(tracer): add importlib._bootstrap to keep modules (#15131) [backport 3.17] (#15135)

backport of #15131 to 3.17

+ version fix for System Tests

Author: christophe-papazian

.github/workflows/system-tests.yml

@@ -45,7 +45,7 @@ jobs:
           persist-credentials: false
           repository: 'DataDog/system-tests'
           # Automatically managed, use scripts/update-system-tests-version to update
-          ref: 'd5152ebefb021a4273f8d189d798c5e302986f7b'
+          ref: 'c9e23e92493253ae6dd314192a72068fe4505d12'
 
       - name: Download wheels to binaries directory
         uses: actions/download-artifact@d3f86a106a0bac45b974a628896c90dbdf5c8093 # v4.3.0
@@ -90,7 +90,7 @@ jobs:
           persist-credentials: false
           repository: 'DataDog/system-tests'
           # Automatically managed, use scripts/update-system-tests-version to update
-          ref: 'd5152ebefb021a4273f8d189d798c5e302986f7b'
+          ref: 'c9e23e92493253ae6dd314192a72068fe4505d12'
 
       - name: Build runner
         uses: ./.github/actions/install_runner
@@ -275,7 +275,7 @@ jobs:
           persist-credentials: false
           repository: 'DataDog/system-tests'
           # Automatically managed, use scripts/update-system-tests-version to update
-          ref: 'd5152ebefb021a4273f8d189d798c5e302986f7b'
+          ref: 'c9e23e92493253ae6dd314192a72068fe4505d12'
       - name: Download wheels to binaries directory
         uses: actions/download-artifact@d3f86a106a0bac45b974a628896c90dbdf5c8093 # v4.3.0
         with:

.gitlab-ci.yml

@@ -14,7 +14,7 @@ variables:
   DD_VPA_TEMPLATE: "vpa-template-cpu-p70-10percent-2x-oom-min-cap"
   # CI_DEBUG_SERVICES: "true"
   # Automatically managed, use scripts/update-system-tests-version to update
-  SYSTEM_TESTS_REF: "d5152ebefb021a4273f8d189d798c5e302986f7b"
+  SYSTEM_TESTS_REF: "c9e23e92493253ae6dd314192a72068fe4505d12"
 
 default:
   interruptible: true

ddtrace/bootstrap/sitecustomize.py

@@ -86,6 +86,7 @@ def drop(module_name):
             "copyreg",  # pickling issues for tracebacks with gevent
             "ddtrace",
             "concurrent",
+            "importlib._bootstrap",  # special import that must not be unloaded
             "typing",
             "_operator",  # pickling issues with typing module
             "re",  # referenced by the typing module

pyproject.toml

@@ -88,7 +88,7 @@ Homepage = "https://github.com/DataDog/dd-trace-py"
 "Source Code" = "https://github.com/DataDog/dd-trace-py/"
 
 [tool.setuptools_scm]
-version_scheme = "release-branch-semver"  # Must be "release-branch-semver" for now in main, see https://github.com/DataDog/dd-trace-py/issues/8801
+version_scheme = "guess-next-dev"
 write_to = "ddtrace/_version.py"
 
 [tool.cython-lint]

releasenotes/notes/pep420_compatibility-99ca4ca528ad47d6.yaml

@@ -0,0 +1,5 @@
+---
+fixes:
+  - |
+    tracer: This fix resolves an issue where an application instrumented by ddtrace could crash at start.
+    Fix compatibility with zope.event==6.0