administration: configuring: multiline: add limitations (#917)

lecaros · web-flow · commit e75fc4e77eb4 · 2022-09-29T18:27:22.000-03:00
Signed-off-by: lecaros &lt;lecaros@calyptia.com&gt;

Signed-off-by: lecaros &lt;lecaros@calyptia.com&gt;
diff --git a/administration/configuring-fluent-bit/multiline-parsing.md b/administration/configuring-fluent-bit/multiline-parsing.md
@@ -173,3 +173,11 @@ $ fluent-bit -c fluent-bit.conf
 ```
 
 The lines that did not match a pattern are not considered as part of the multiline message, while the ones that matched the rules were concatenated properly.
+
+## Limitations
+
+The multiline parser is a very powerful feature, but it has some limitations that you should be aware of:
+
+* The multiline parser is not affected by the `buffer_max_size` configuration option, allowing the composed log record to grow beyond this size.
+Hence, the `skip_long_lines` option will not be applied to multiline messages. 
+* It is not possible to get the time key from the body of the multiline message. However, it can be extracted and set as a new key by using a filter. 
