Optimization for when ctx->keep_file_handle=false

Author: david-garcia-garcia

plugins/in_tail/tail_fs_stat.c

@@ -161,6 +161,20 @@ static int tail_fs_check(struct flb_input_instance *ins,
             file->pending_bytes = 0;
         }
 
+        /*
+         * Skip rotation detection when keep_file_handle is false.
+         * Rotation detection requires persistent open handles to work reliably.
+         * Without keeping handles open, calling flb_tail_file_name() would
+         * unnecessarily open and close handles multiple times per check cycle.
+         * Because we are not keeping a handle, a rotation would be interpreted
+         * as a truncation and handled by the truncation management logic.
+         */
+         if (ctx->keep_file_handle == FLB_FALSE) {
+            flb_plg_debug(ctx->ins, "tail_fs_check: skipping rotation detection for %s (keep_file_handle is false)", 
+                          file->name);
+            continue;
+        }
+
         /* Discover the current file name for the open file descriptor */
         name = flb_tail_file_name(file);
         if (!name) {