SERVER-52556 Versioned CollectionCatalog. Writes are performed using copy-on-write.

Internal mutexes when reading CollectionCatalog are removed, just one mutex for writes are needed.
Lock-free reads helper AutoGetCollectionForReadLockFree stashes a CollectionCatalog consistent with snapshot on OperationContext

1 files changed, 2 insertions, 2 deletions

diff --git a/src/mongo/db/s/migration_destination_manager.cpp b/src/mongo/db/s/migration_destination_manager.cpp
index 2955886c127..8d42b161ddc 100644
--- a/src/mongo/db/s/migration_destination_manager.cpp
+++ b/src/mongo/db/s/migration_destination_manager.cpp
@@ -817,7 +817,7 @@ void MigrationDestinationManager::cloneCollectionIndexesAndOptions(
         AutoGetOrCreateDb autoCreateDb(opCtx, nss.db(), MODE_X);
         auto db = autoCreateDb.getDb();
 
-        auto collection = CollectionCatalog::get(opCtx).lookupCollectionByNamespace(opCtx, nss);
+        auto collection = CollectionCatalog::get(opCtx)->lookupCollectionByNamespace(opCtx, nss);
         if (collection) {
             checkUUIDsMatch(collection);
         } else {
@@ -834,7 +834,7 @@ void MigrationDestinationManager::cloneCollectionIndexesAndOptions(
                                              createDefaultIndexes,
                                              collectionOptionsAndIndexes.idIndexSpec));
             wuow.commit();
-            collection = CollectionCatalog::get(opCtx).lookupCollectionByNamespace(opCtx, nss);
+            collection = CollectionCatalog::get(opCtx)->lookupCollectionByNamespace(opCtx, nss);
         }
 
         auto indexSpecs = checkEmptyOrGetMissingIndexesFromDonor(collection);