SERVER-43097 Improve log messaging when index builds get foregrounded because of startup recovery

2 files changed, 4 insertions, 3 deletions

diff --git a/src/mongo/db/repl/oplog.cpp b/src/mongo/db/repl/oplog.cpp
index ce608907461..3694c9c73d2 100644
--- a/src/mongo/db/repl/oplog.cpp
+++ b/src/mongo/db/repl/oplog.cpp
@@ -219,8 +219,8 @@ bool shouldBuildInForeground(OperationContext* opCtx,
                              const NamespaceString& indexNss,
                              repl::OplogApplication::Mode mode) {
     if (mode == OplogApplication::Mode::kRecovering) {
-        LOG(3) << "apply op: building background index " << index
-               << " in the foreground because the node is in recovery";
+        log() << "apply op: building background index " << index
+              << " in the foreground because the node is in recovery - see SERVER-43097";
         return true;
     }
 
diff --git a/src/mongo/db/storage/kv/kv_storage_engine.cpp b/src/mongo/db/storage/kv/kv_storage_engine.cpp
index c9dd5b15457..1917e3b4807 100644
--- a/src/mongo/db/storage/kv/kv_storage_engine.cpp
+++ b/src/mongo/db/storage/kv/kv_storage_engine.cpp
@@ -419,7 +419,8 @@ KVStorageEngine::reconcileCatalogAndIdents(OperationContext* opCtx) {
             // will return the index to be rebuilt.
             if (indexMetaData.isBackgroundSecondaryBuild && (!foundIdent || !indexMetaData.ready)) {
                 log()
-                    << "Expected background index build did not complete, rebuilding. Collection: "
+                    << "Expected background index build did not complete, rebuilding in foreground"
+                       " - see SERVER-43097. Collection: "
                     << coll << " Index: " << indexName;
                 ret.emplace_back(coll, indexName);
                 continue;