Check repl cursor before using SERVER-6762

1 files changed, 5 insertions, 0 deletions

diff --git a/src/mongo/db/repl/rs_sync.cpp b/src/mongo/db/repl/rs_sync.cpp
index 012c4d60199..6bd7d0b0b89 100644
--- a/src/mongo/db/repl/rs_sync.cpp
+++ b/src/mongo/db/repl/rs_sync.cpp
@@ -766,6 +766,11 @@ namespace replset {
                     return;
                 }
                 slave->reader.ghostQueryGTE(rsoplog, last);
+                // if we lose the connection between connecting and querying, the cursor may not
+                // exist so we have to check again before using it.
+                if (!slave->reader.haveCursor()) {
+                    return;
+                }
             }
 
             LOG(1) << "replSet last: " << slave->last.toString() << " to " << last.toString() << rsLog;