The max index can not greater than 20, hardcode, in FixedWindowRollingPolicy.java /** * It's almost always a bad idea to have a large window size, say over 20. */ private static int MAX_WINDOW_SIZE = 20; BR, Mike(Yu, Chong-Chao) ------------------ 原始邮件 ------------------ 发件人: "haobo liu"<lhbazazazv@gmail.com>; 发送时间: 2020年6月18日(星期四) 上午9:12 收件人: "logback users list"<logback-user@qos.ch>; 主题: Re: [logback-user] maxIndex issue does '200KB' is effective? every file part size is '200KB'? Joud Kassem <joud.kassem79@gmail.com> 于2020年6月17日周三 下午7:57写道： Hi all, I have my rollingFileAppender configured as follows: appender("myAppender", RollingFileAppender) { file = "${logDir}/myApp.log" encoder(PatternLayoutEncoder) { charset = Charset.forName('UTF-8') pattern = log_pattern } rollingPolicy(FixedWindowRollingPolicy) { fileNamePattern = "${logDir}/myApp%i.log" minIndex = 1 maxIndex = 24 } triggeringPolicy(SizeBasedTriggeringPolicy) { maxFileSize = FileSize.valueOf("200KB") } } I had first the maxIndex = 20, i modified it to 24 and I'm testing. As I see the number of logs are 21 and rotating while it should be 24! I tested it a lot and still the same issue. Anybody has this issue before or knows why this is happening? Thanks in advance, Joud _______________________________________________ logback-user mailing list logback-user@qos.ch http://mailman.qos.ch/mailman/listinfo/logback-user