prevent reporting negative retention when the db is empty (#15796)

netdata · Aug 16, 2023 · cf03ac9 · cf03ac9
1 parent 88d71a9
commit cf03ac9
Showing 1 changed file with 6 additions and 1 deletion.
diff --git a/database/engine/rrdengineapi.c b/database/engine/rrdengineapi.c
@@ -1014,7 +1014,12 @@ size_t rrdeng_disk_space_used(STORAGE_INSTANCE *db_instance) {
 
 time_t rrdeng_global_first_time_s(STORAGE_INSTANCE *db_instance) {
     struct rrdengine_instance *ctx = (struct rrdengine_instance *)db_instance;
-    return __atomic_load_n(&ctx->atomic.first_time_s, __ATOMIC_RELAXED);
+
+    time_t t = __atomic_load_n(&ctx->atomic.first_time_s, __ATOMIC_RELAXED);
+    if(t == LONG_MAX || t < 0)
+        t = 0;
+
+    return t;
 }
 
 size_t rrdeng_currently_collected_metrics(STORAGE_INSTANCE *db_instance) {