fix(library): catch exceptions raised while enabling ddtrace integrat…

…ions (#11759)

## Description

- Improves the error message generated when `ddtrace` failed to
patch/enable an integration.
- Ensure patching modules and sub-modules are wrapped in a try-except.
The ddtrace library should not crash an application if an integration
can not be patched.

## Motivation

Prevent issues like this:
#11603

## Checklist
- [x] PR author has checked that all the criteria below are met
- The PR description includes an overview of the change
- The PR description articulates the motivation for the change
- The change includes tests OR the PR description describes a testing
strategy
- The PR description notes risks associated with the change, if any
- Newly-added code is easy to change
- The change follows the [library release note
guidelines](https://ddtrace.readthedocs.io/en/stable/releasenotes.html)
- The change includes or references documentation updates if necessary
- Backport labels are set (if
[applicable](https://ddtrace.readthedocs.io/en/latest/contributing.html#backporting))

## Reviewer Checklist
- [x] Reviewer has checked that all the criteria below are met 
- Title is accurate
- All changes are related to the pull request's stated goal
- Avoids breaking
[API](https://ddtrace.readthedocs.io/en/stable/versioning.html#interfaces)
changes
- Testing strategy adequately addresses listed risks
- Newly-added code is easy to change
- Release note makes sense to a user of the library
- If necessary, author has acknowledged and discussed the performance
implications of this PR as reported in the benchmarks PR comment
- Backport labels are set in a manner that is consistent with the
[release branch maintenance
policy](https://ddtrace.readthedocs.io/en/latest/contributing.html#backporting)

ddtrace/_monkey.py

@@ -173,17 +173,22 @@ def on_import(hook):
         path = "%s.%s" % (prefix, module)
         try:
             imported_module = importlib.import_module(path)
+            imported_module.patch()
+            if hasattr(imported_module, "patch_submodules"):
+                imported_module.patch_submodules(patch_indicator)
         except Exception as e:
             if raise_errors:
                 raise
-            error_msg = "failed to import ddtrace module %r when patching on import" % (path,)
-            log.error(error_msg, exc_info=True)
-            telemetry.telemetry_writer.add_integration(module, False, PATCH_MODULES.get(module) is True, error_msg)
+            log.error(
+                "failed to enable ddtrace support for %s: %s",
+                module,
+                str(e),
+            )
+            telemetry.telemetry_writer.add_integration(module, False, PATCH_MODULES.get(module) is True, str(e))
             telemetry.telemetry_writer.add_count_metric(
                 "tracers", "integration_errors", 1, (("integration_name", module), ("error_type", type(e).__name__))
             )
         else:
-            imported_module.patch()
             if hasattr(imported_module, "get_versions"):
                 versions = imported_module.get_versions()
                 for name, v in versions.items():
@@ -196,9 +201,6 @@ def on_import(hook):
                     module, True, PATCH_MODULES.get(module) is True, "", version=version
                 )
 
-            if hasattr(imported_module, "patch_submodules"):
-                imported_module.patch_submodules(patch_indicator)
-
     return on_import
 
 

releasenotes/notes/refactor-patch-error-ssi-1a2e9fe206d6d6df.yaml

@@ -0,0 +1,4 @@
+--- 
+fixes:
+  - |
+    Integrations: Improved error handling for exceptions raised during the startup of ddtrace integrations. This reduces the likelihood of the ddtrace library raising unhandled exceptions.

tests/telemetry/test_telemetry.py

@@ -243,14 +243,12 @@ def test_handled_integration_error(test_agent_session, run_python_code_in_subpro
     _, stderr, status, _ = run_python_code_in_subprocess(code, env=env)
 
     assert status == 0, stderr
-    expected_stderr = b"failed to import"
-    assert expected_stderr in stderr
+    assert b"failed to enable ddtrace support for sqlite3" in stderr
 
     integrations_events = test_agent_session.get_events("app-integrations-change", subprocess=True)
     assert len(integrations_events) == 1
     assert (
-        integrations_events[0]["payload"]["integrations"][0]["error"]
-        == "failed to import ddtrace module 'ddtrace.contrib.sqlite3' when patching on import"
+        integrations_events[0]["payload"]["integrations"][0]["error"] == "module 'sqlite3' has no attribute 'connect'"
     )
 
     # Get metric containing the integration error