SERVER-26102 set shardVersion to IGNORED for system.indexes, but only if a shardVersion was sent in the command

1 files changed, 6 insertions, 0 deletions

diff --git a/src/mongo/db/s/operation_sharding_state.cpp b/src/mongo/db/s/operation_sharding_state.cpp
index a940ffc01df..0f92bbd5492 100644
--- a/src/mongo/db/s/operation_sharding_state.cpp
+++ b/src/mongo/db/s/operation_sharding_state.cpp
@@ -66,6 +66,11 @@ void OperationShardingState::initializeShardVersion(NamespaceString nss,
         return;
     }
 
+    if (nss.isSystemDotIndexes()) {
+        setShardVersion(std::move(nss), ChunkVersion::IGNORED());
+        return;
+    }
+
     setShardVersion(std::move(nss), std::move(newVersion));
 }
 
@@ -84,6 +89,7 @@ ChunkVersion OperationShardingState::getShardVersion(const NamespaceString& nss)
 void OperationShardingState::setShardVersion(NamespaceString nss, ChunkVersion newVersion) {
     // This currently supports only setting the shard version for one namespace.
     invariant(!_hasVersion || _ns == nss);
+    invariant(!nss.isSystemDotIndexes() || ChunkVersion::isIgnoredVersion(newVersion));
 
     _ns = std::move(nss);
     _shardVersion = std::move(newVersion);