in_node_exporter_metrics: delete collector on init failure

Signed-off-by: Stefano Tondo <stondo@gmail.com>

Author: stondo

plugins/in_node_exporter_metrics/ne.c

@@ -154,6 +154,10 @@ static int activate_collector(struct flb_ne *ctx, struct flb_config *config,
 
     ret = coll->cb_init(ctx);
     if (ret != 0) {
+        if (coll->cb_update && coll->coll_fd >= 0) {
+            flb_input_collector_delete(coll->coll_fd, ctx->ins);
+            coll->coll_fd = -1;
+        }
         flb_plg_error(ctx->ins, "%s init failed", name);
         return -1;
     }