SERVER-16315 Nodes should not threaten to veto nodes whose config version is higher than their own.

1 files changed, 6 insertions, 0 deletions

diff --git a/src/mongo/db/repl/consensus.cpp b/src/mongo/db/repl/consensus.cpp
index fc89d906a9d..c20a4216f3f 100644
--- a/src/mongo/db/repl/consensus.cpp
+++ b/src/mongo/db/repl/consensus.cpp
@@ -57,6 +57,12 @@ namespace mongo {
                 return false;
             }
 
+            int cfgver = cmdObj["cfgver"].Int();
+            if (theReplSet->config().version < cfgver) {
+                // Our config is stale; do not veto.
+                return false;
+            }
+
             unsigned id = cmdObj["id"].Int();
             const Member* primary = theReplSet->box.getPrimary();
             const Member* hopeful = theReplSet->findById(id);