update

Former-commit-id: 2561c4f4412eb0f52751d1cbc73e47c9b57652d9

cpp/CHANGELOG.md

@@ -27,6 +27,7 @@ Please mark all change in change log and use the ticket from JIRA.
 - MS-99 - Fix compilation bug
 - MS-110 - Avoid huge file size
 - MS-148 - Disable cleanup if mode is read only
+- MS-149 - Fixed searching only one index file issue in distributed mode
 
 ## Improvement
 - MS-82 - Update server startup welcome message