From d059c87f879ff3e06bc488058b3cfd316f23cf7c Mon Sep 17 00:00:00 2001
From: Parker Felix <68665637+parker-felix@users.noreply.github.com>
Date: Fri, 22 May 2026 11:07:23 -0400
Subject: [PATCH] SERVER-127293 Handle "cu" opType in _parseAreOpsCrudOnly
 (#54165)

GitOrigin-RevId: 2e94ccddb4a1eeaa75eea459829bfafee639f185
---
 src/mongo/db/repl/apply_ops_command_info.cpp      | 2 ++
 src/mongo/db/repl/apply_ops_command_info_test.cpp | 3 +++
 2 files changed, 5 insertions(+)

diff --git a/src/mongo/db/repl/apply_ops_command_info.cpp b/src/mongo/db/repl/apply_ops_command_info.cpp
index a073f6f4479..1675ea293c7 100644
--- a/src/mongo/db/repl/apply_ops_command_info.cpp
+++ b/src/mongo/db/repl/apply_ops_command_info.cpp
@@ -69,6 +69,8 @@ bool _parseAreOpsCrudOnly(const BSONObj& applyOpCmd) {
             continue;
         } else if (opType == "u"_sd) {
             continue;
+        } else if (opType == "cu"_sd) {
+            continue;
         } else if (opType == "n"_sd) {
             continue;
         } else {
diff --git a/src/mongo/db/repl/apply_ops_command_info_test.cpp b/src/mongo/db/repl/apply_ops_command_info_test.cpp
index 6df69da6452..03a8c52ac07 100644
--- a/src/mongo/db/repl/apply_ops_command_info_test.cpp
+++ b/src/mongo/db/repl/apply_ops_command_info_test.cpp
@@ -51,6 +51,9 @@ TEST(ApplyOpsCommandInfoTest, TestParseAreOpsCrudOnlySingleOps) {
     const BSONObj updateOp = BSON("applyOps" << BSON_ARRAY(BSON("op" << "u")));
     ASSERT_TRUE(_parseAreOpsCrudOnly(updateOp));
 
+    const BSONObj containerUpdateOp = BSON("applyOps" << BSON_ARRAY(BSON("op" << "cu")));
+    ASSERT_TRUE(_parseAreOpsCrudOnly(containerUpdateOp));
+
     const BSONObj noop = BSON("applyOps" << BSON_ARRAY(BSON("op" << "n")));
     ASSERT_TRUE(_parseAreOpsCrudOnly(noop));