按日拆分~200mb log4j日志文件

Question

我有一个格式如下的日志文件，我希望白天将它分成多个文件（即log-2017-10-2，log-2017-10-3等）。我见过人们用awk做的但是我不知道如何处理堆栈跟踪，因为java.io.Exception是一个新行。有没有方便的方法来实现这一目标？

    2017-10-02 04:26:02,534 INFO XXXXXXXXXXXXXXXXX
    2017-10-03 04:26:02,543 INFO XXXXXXXXXXXX
    2017-10-04 04:26:02,544 INFO XXXXXXXXX
    2017-10-04 04:26:02,546 INFO XXXXXXXXXXXXX
    2017-10-04 04:26:02,549 INFO XXXXXXXXXXX
    2017-10-04 04:53:02,787 WARN class.class.class: [FetcherXXXXXX], Error in fetch XXXXXXXXXXXXXXXXXXXXXX
    java.io.IOException: Connection to X was disconnected before the response was read
            at XXXXXXXXXXXXXXXXXXXX
            at XXXXXXXXXXXXXXXXXXXX
            at XXXXXXXXXXXXXXXXXXXXX
            at XXXXXXXXXXXXXXXX
            at XXXXXXXXXXXXXXXX
    2017-10-05 04:26:02,549 INFO XXXXXXXXXXX

最终文件内容将是：

log-2017-10-2:
2017-10-02 04:26:02,534 INFO XXXXXXXXXXXXXXXXX


log-2017-10-3:
2017-10-03 04:26:02,543 INFO XXXXXXXXXXXX

log-2017-10-4:
2017-10-04 04:26:02,544 INFO XXXXXXXXX
    2017-10-04 04:26:02,546 INFO XXXXXXXXXXXXX
    2017-10-04 04:26:02,549 INFO XXXXXXXXXXX
    2017-10-04 04:53:02,787 WARN class.class.class: [FetcherXXXXXX], Error in fetch XXXXXXXXXXXXXXXXXXXXXX
    java.io.IOException: Connection to X was disconnected before the response was read
            at XXXXXXXXXXXXXXXXXXXX
            at XXXXXXXXXXXXXXXXXXXX
            at XXXXXXXXXXXXXXXXXXXXX
            at XXXXXXXXXXXXXXXX
            at XXXXXXXXXXXXXXXX

log-2017-10-5:
2017-10-05 04:26:02,549 INFO XXXXXXXXXXX

Answer 1

awk救援！

$ awk --posix 'BEGIN{f="log-header"} 
     $1~/^[0-9]{4}-[0-9]{2}-[0-9]{2}$/{f="log-"$1} {print > f}' log

如果日期太多（对应于太多打开的文件），您可能需要在一个点关闭文件。几百个它应该按原样工作。

如果您的日志未以选中的正则表达式启动，则会设置初始日志文件（日志标头）。

Answer 2

awk解决方案：

awk '/^[0-9]{4}-[0-9]{2}-[0-9]{2} /{ 
         if (fn && !a[$1]++) close(fn);
         fn="log-"$1 
     }{ print > fn }' logfile

• /^[0-9]{4}-[0-9]{2}-[0-9]{2} / - 遇到以日期字符串开头的行
• if(fn && !a[$1]++) close(fn) - 关闭之前“日期”的先前打开的文件描述符
• fn="log-"$1 - 构建文件名

---

查看结果：

$ head log-*
==> log-2017-10-02 <==
2017-10-02 04:26:02,534 INFO XXXXXXXXXXXXXXXXX

==> log-2017-10-03 <==
2017-10-03 04:26:02,543 INFO XXXXXXXXXXXX

==> log-2017-10-04 <==
2017-10-04 04:26:02,544 INFO XXXXXXXXX
2017-10-04 04:26:02,546 INFO XXXXXXXXXXXXX
2017-10-04 04:26:02,549 INFO XXXXXXXXXXX
2017-10-04 04:53:02,787 WARN class.class.class: [FetcherXXXXXX], Error in fetch XXXXXXXXXXXXXXXXXXXXXX
java.io.IOException: Connection to X was disconnected before the response was read
        &XXXXXXXXXXXXXXXXXXXX
        &XXXXXXXXXXXXXXXXXXXX
        &XXXXXXXXXXXXXXXXXXXXX
        &XXXXXXXXXXXXXXXX
        &XXXXXXXXXXXXXXXX

==> log-2017-10-05 <==
2017-10-05 04:26:02,549 INFO XXXXXXXXXXX