fix(file-age): handle FileNotFoundError race condition when files disappear on busy file systems

Author: markuslf

CHANGELOG.md

@@ -39,6 +39,7 @@ Monitoring Plugins:
 * about-me: error in perfdata if using `--dmidecode` and there is no HW information
 * about-me: fix various errors with `sys_dimensions` on some machines
 * by-ssh: add missing `--verbose` parameter
+* file-age: handle `FileNotFoundError` race condition when files disappear on busy file systems
 * fs-ro: ignore `/run/credentials` (https://systemd.io/CREDENTIALS/)
 * keycloak-stats: fix incorrect symlink for lib
 * ntp-\*: prevent `TypeError: ''=' not supported between instances of 'int' and 'str'`

check-plugins/file-age/file-age

@@ -215,13 +215,17 @@ def main():
     if args.FILENAME:
         path = Path(args.FILENAME)
         for item in sorted(Path(path.anchor).glob(str(path.relative_to(path.anchor)))):
-            if item.is_file() and args.ONLY_DIRS:
-                continue
-            if item.is_dir() and args.ONLY_FILES:
-                continue
+            try:
+                if item.is_file() and args.ONLY_DIRS:
+                    continue
+                if item.is_dir() and args.ONLY_FILES:
+                    continue
 
-            # brandnew files might get negative values
-            age = abs(lib.time.now() - item.stat().st_mtime)
+                # brandnew files might get negative values
+                age = abs(lib.time.now() - item.stat().st_mtime)
+            except FileNotFoundError:
+                # it is normal that files disappear while reading
+                continue
             ages.append(age)
             item_state = STATE_OK
             # not using elif, as the item could contribute to both the warn_count and crit_count