Hi：

 same as the title;

 recently,Our system has been transformed into a distributed system with all log append to same file; （ELK need more machine,can  not take it）

 but only one service can log success ,(others all failed,but can lot catalina.out)  <configuration debug="true">, but Unable to track problem with logback self logs（has no log about filelock）;

here is some linxu echos , may help;

thanks a lot!