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AWS systems-manager documentation change

Service: systems-manager · 2025-05-16 · Documentation low

File: systems-manager/latest/userguide/patch-manager-troubleshooting.md

Summary

Added troubleshooting entry for 'Encounter service side error when uploading the inventory' and updated a date

Security assessment

The change documents a race condition error in patching operations but does not indicate any security vulnerability or security feature enhancement. The date change is purely cosmetic.

Diff

diff --git a/systems-manager/latest/userguide/patch-manager-troubleshooting.md b/systems-manager/latest/userguide/patch-manager-troubleshooting.md
index 8e14fd6a9..a32ef2e46 100644
--- a//systems-manager/latest/userguide/patch-manager-troubleshooting.md
+++ b//systems-manager/latest/userguide/patch-manager-troubleshooting.md
@@ -136,0 +137,2 @@ When a `Scan` operation runs, it overwrites the compliance details from the most
+  * Issue: Patching fails with 'Encounter service side error when uploading the inventory'
+
@@ -275 +277 @@ When a `Scan` operation runs, it overwrites the compliance details from the most
-    05/01/2023 17:04:30 root [ERROR]: Error code returned from curl is 23
+    05/01/2025 17:04:30 root [ERROR]: Error code returned from curl is 23
@@ -299,0 +302,11 @@ A common example occurs with the `urllib3` package, which is found in `pip`, `yu
+### Issue: Patching fails with 'Encounter service side error when uploading the inventory'
+
+**Problem** : When running the `AWS-RunPatchBaseline` document, you receive the following error message:
+    
+    
+    Encounter service side error when uploading the inventory
+
+**Cause** : Two commands to run `AWS-RunPatchBaseline` were running at the same time on the same managed node. This creates a race condition when initializing boto3 client during patching operations.
+
+**Solution** : Ensure that no State Manager association, maintenance window tasks, or other configurations that run `AWS-RunPatchBaseline` on a schedule are targeting the same managed node around the same time.
+