SERVER-46721 Secondary readers should read at the no-overlap time instead of lastApplied

The no-overlap time, ReadSource::kNoOverlap, is the minimum of replication's lastApplied timestamp
and WiredTiger's all_durable time. This time is independent of replication state and ensures
queries do not see oplog holes after state transitions from secondary to primary.

1 files changed, 2 insertions, 2 deletions

diff --git a/src/mongo/db/repl/transaction_oplog_application.cpp b/src/mongo/db/repl/transaction_oplog_application.cpp
index b9f75c07d1a..8608926919c 100644
--- a/src/mongo/db/repl/transaction_oplog_application.cpp
+++ b/src/mongo/db/repl/transaction_oplog_application.cpp
@@ -512,8 +512,8 @@ void reconstructPreparedTransactions(OperationContext* opCtx, repl::OplogApplica
     }
     // Read the transactions table and the oplog collection without a timestamp.
     // The below DBDirectClient read uses AutoGetCollectionForRead which could implicitly change the
-    // read source to kLastApplied. So we need to explicitly set the read source to kNoTimestamp to
-    // force reads in this scope to be untimestamped.
+    // read source. So we need to explicitly set the read source to kNoTimestamp to force reads in
+    // this scope to be untimestamped.
     ReadSourceScope readSourceScope(opCtx, RecoveryUnit::ReadSource::kNoTimestamp);
 
     DBDirectClient client(opCtx);