SERVER-39142 ServerWriteConcernMetrics must lock _mutex before modifying members

(cherry picked from commit f0c439824a621d9318fb8f32ac3e314542683e34)

1 files changed, 3 insertions, 0 deletions

diff --git a/src/mongo/db/stats/server_write_concern_metrics.h b/src/mongo/db/stats/server_write_concern_metrics.h
index 355a63bff90..c7a17dcc5d7 100644
--- a/src/mongo/db/stats/server_write_concern_metrics.h
+++ b/src/mongo/db/stats/server_write_concern_metrics.h
@@ -54,6 +54,7 @@ public:
      */
     void recordWriteConcernForInserts(const WriteConcernOptions& writeConcernOptions,
                                       size_t numInserts) {
+        stdx::lock_guard<stdx::mutex> lg(_mutex);
         _insertMetrics.recordWriteConcern(writeConcernOptions, numInserts);
     }
 
@@ -68,6 +69,7 @@ public:
      * Updates the update metrics according to the 'w' value of 'writeConcernOptions'.
      */
     void recordWriteConcernForUpdate(const WriteConcernOptions& writeConcernOptions) {
+        stdx::lock_guard<stdx::mutex> lg(_mutex);
         _updateMetrics.recordWriteConcern(writeConcernOptions);
     }
 
@@ -75,6 +77,7 @@ public:
      * Updates the delete metrics according to the 'w' value of 'writeConcernOptions'.
      */
     void recordWriteConcernForDelete(const WriteConcernOptions& writeConcernOptions) {
+        stdx::lock_guard<stdx::mutex> lg(_mutex);
         _deleteMetrics.recordWriteConcern(writeConcernOptions);
     }