[8.19](backport #47494) [Filebeat/Journald] Add note about the issues with using globs

filebeat/docs/inputs/input-journald.asciidoc

@@ -106,13 +106,29 @@ an unique ID.
 [id="{beatname_lc}-input-{type}-paths"]
 ==== `paths`
 
-A list of paths that will be crawled and fetched. Each path can be a directory
-path (to collect events from all journals in a directory), or a file path. If
-you specify a directory, {beatname_uc} merges all journals under the directory
-into a single journal and reads them.
+A list of paths that will be crawled and fetched. A path can be either:
+
+* A file path
+* A directory path (to collect events from all journals in a directory). If you specify a directory, Filebeat merges all journals under the directory into a single journal and reads them.
 
 If no paths are specified, {beatname_uc} reads from the default journal.
 
+For example, this configuration will ingest all journals and correctly handle the journald rotation:
+
+[source,yaml]
+----
+  - type: journald
+    id: journald-id
+    paths:
+      - /var/log/journal
+----
+
+
+WARNING: If a glob (for example, `/var/log/journal/*/*.journal`) is used, the journald
+input will only ingest the journal files found when started. New
+files will not be ingested.
+
+
 [float]
 [id="{beatname_lc}-input-{type}-seek"]
 ==== `seek`