Hi all,<br><br>I would like to known if TurboFilter is multithread-safe or not since the manual does not say anything about it.<br><br>Reviewing <a href="https://github.com/ceki/logback/blob/master/logback-classic/src/main/java/ch/qos/logback/classic/turbo/DuplicateMessageFilter.java">https://github.com/ceki/logback/blob/master/logback-classic/src/main/java/ch/qos/logback/classic/turbo/DuplicateMessageFilter.java</a> I have seen that a it makes use of a LinkedHashMap (<a href="http://download.oracle.com/javase/6/docs/api/java/util/LinkedHashMap.html">http://download.oracle.com/javase/6/docs/api/java/util/LinkedHashMap.html</a>) which requires synchronization in case of multithread access.<br>

<br>BR,<br>/César.<br>