Must take mutex when updating bucket space statistics

1 files changed, 1 insertions, 0 deletions

diff --git a/storage/src/vespa/storage/distributor/distributor.cpp b/storage/src/vespa/storage/distributor/distributor.cpp
index f5e77c6a172..41ef0f2dcef 100644
--- a/storage/src/vespa/storage/distributor/distributor.cpp
+++ b/storage/src/vespa/storage/distributor/distributor.cpp
@@ -444,6 +444,7 @@ BucketSpacesStatsProvider::BucketSpacesStats Distributor::make_invalid_stats_per
 }
 
 void Distributor::invalidate_bucket_space_stats() {
+    vespalib::LockGuard guard(_metricLock);
     _bucketSpacesStats = BucketSpacesStatsProvider::PerNodeBucketSpacesStats();
     auto invalid_space_stats = make_invalid_stats_per_configured_space();