[logback-user] Memory consumption problem with LRUMessageCache class

Hello, we have problems of excessive memory consumption, due to the object LRUMessageCache that grows constantly, until it exceeds 100MB. Then we restart the JVM to avoid crashes. Could the anomaly http://jira.qos.ch/browse/LBCLASSIC-255 regarding the fact that the class LRUMessageCache is not multithread-safe explain the problem? Thank you in advance.