SERVER-9518 Change getAllDatabaseNames from using GlobalWrite to using GlobalRead

2 files changed, 2 insertions, 1 deletions

diff --git a/src/mongo/db/auth/authz_manager_external_state.h b/src/mongo/db/auth/authz_manager_external_state.h
index f75c49b416b..f25ead5dd44 100644
--- a/src/mongo/db/auth/authz_manager_external_state.h
+++ b/src/mongo/db/auth/authz_manager_external_state.h
@@ -84,6 +84,7 @@ namespace mongo {
 
         /**
          * Puts into the *dbnames vector the name of every database in the cluster.
+         * May take a global lock, so should only be called during startup.
          */
         virtual Status getAllDatabaseNames(std::vector<std::string>* dbnames) = 0;
 
diff --git a/src/mongo/db/auth/authz_manager_external_state_d.cpp b/src/mongo/db/auth/authz_manager_external_state_d.cpp
index 8066e3c6a82..380e319951a 100644
--- a/src/mongo/db/auth/authz_manager_external_state_d.cpp
+++ b/src/mongo/db/auth/authz_manager_external_state_d.cpp
@@ -79,7 +79,7 @@ namespace {
 
     Status AuthzManagerExternalStateMongod::getAllDatabaseNames(
             std::vector<std::string>* dbnames) {
-        Lock::GlobalWrite lk;
+        Lock::GlobalRead lk;
         getDatabaseNames(*dbnames);
         return Status::OK();
     }