SERVER-21452 log begin and end of fetcher in bgsync

1 files changed, 2 insertions, 0 deletions

diff --git a/src/mongo/db/repl/bgsync.cpp b/src/mongo/db/repl/bgsync.cpp
index ba9f0d66ad4..830da329ee1 100644
--- a/src/mongo/db/repl/bgsync.cpp
+++ b/src/mongo/db/repl/bgsync.cpp
@@ -359,6 +359,7 @@ void BackgroundSync::_produce(OperationContext* txn) {
                     metadataObj,
                     _replCoord->getConfig().getElectionTimeoutPeriod());
 
+    LOG(1) << "scheduling fetcher to read remote oplog on " << source;
     auto scheduleStatus = fetcher.schedule();
     if (!scheduleStatus.isOK()) {
         warning() << "unable to schedule fetcher to read remote oplog on " << source << ": "
@@ -366,6 +367,7 @@ void BackgroundSync::_produce(OperationContext* txn) {
         return;
     }
     fetcher.wait();
+    LOG(1) << "fetcher stopped reading remote oplog on " << source;
 
     // If the background sync is paused after the fetcher is started, we need to
     // re-evaluate our sync source and oplog common point.