2. 系統配置將錯誤日志記錄到Logstash后端，如下所示：

log4j . appende r . applog.port=50 0 0

log4j . appender . applog. remoteHost=masterlog4j . appender . applog . DatePattern- ' . ' yyyy—MM—ddlog4j . appender . applog .layout=org. apache .1094j . PatternLayoutlog4j  . appender . applog .layout . ConversionPattern='od   % - 5p    [ % t ]    %C   %M -  %m %nlog4j .rootLogger=warn, apploglog4j .logger.nl=debug