[logback-user] has problem with 'multi process append log to one file', need help!

[Aruforce]

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）;


reviewed Code `FileAppender.safeWrite()` ,it has file lock ;


here is some linxu echos , may help;


thanks a lot!
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