add messaging for shard version reset at high verbosity SERVER-3889

1 files changed, 7 insertions, 0 deletions

diff --git a/s/shard_version.cpp b/s/shard_version.cpp
index 8782c8e2672..71a4bff3460 100644
--- a/s/shard_version.cpp
+++ b/s/shard_version.cpp
@@ -140,6 +140,13 @@ namespace mongo {
             version = manager->getVersion( Shard::make( conn->getServerAddress() ) );
         }
 
+        if( version == 0 ){
+            LOG(2) << "resetting shard version of " << ns << " on " << conn->getServerAddress() << ", " <<
+                      ( ! isSharded ? "no longer sharded" :
+                      ( ! manager ? "no chunk manager found" :
+                                    "version is zero" ) ) << endl;
+        }
+
         LOG(2) << " have to set shard version for conn: " << conn << " ns:" << ns
                << " my last seq: " << sequenceNumber << "  current: " << officialSequenceNumber
                << " version: " << version << " manager: " << manager.get()