SERVER-38284 Create concurrency lock for CollectionShardingRuntime

1 files changed, 3 insertions, 2 deletions

diff --git a/src/mongo/db/s/active_migrations_registry.cpp b/src/mongo/db/s/active_migrations_registry.cpp
index 78503d62090..6f12e0119ec 100644
--- a/src/mongo/db/s/active_migrations_registry.cpp
+++ b/src/mongo/db/s/active_migrations_registry.cpp
@@ -121,9 +121,10 @@ BSONObj ActiveMigrationsRegistry::getActiveMigrationStatusReport(OperationContex
     if (nss) {
         // Lock the collection so nothing changes while we're getting the migration report.
         AutoGetCollection autoColl(opCtx, nss.get(), MODE_IS);
+        auto csr = CollectionShardingRuntime::get(opCtx, nss.get());
+        auto csrLock = CollectionShardingRuntimeLock::lock(opCtx, csr);
 
-        if (auto msm =
-                MigrationSourceManager::get(CollectionShardingRuntime::get(opCtx, nss.get()))) {
+        if (auto msm = MigrationSourceManager::get(csr, csrLock)) {
             return msm->getMigrationStatusReport();
         }
     }