Java Stack  

Exception后面行都是以空白开始的。

Exception in thread "main" java.lang.NullPointerException
        at com.example.myproject.Book.getTitle(Book.java:16)
        at com.example.myproject.Author.getBookTitles(Author.java:25)
        at com.example.myproject.Bootstrap.main(Bootstrap.java:14)

multiline.pattern: '^[[:space:]]'
multiline.negate: false
multiline.match: after

空白开始或者...或者Caused by开始的都为一段

Exception in thread "main" java.lang.IllegalStateException: A book has a null property
       at com.example.myproject.Author.getBookIds(Author.java:38)
       at com.example.myproject.Bootstrap.main(Bootstrap.java:14)
Caused by: java.lang.NullPointerException
       at com.example.myproject.Book.getId(Book.java:22)
       at com.example.myproject.Author.getBookIds(Author.java:35)
       ... 1 more

multiline.pattern: '^[[:space:]]+(at|\.{3})[[:space:]]+\b|^Caused by:'
multiline.negate: false
multiline.match: after

断行

printf ("%10.10ld  \t %10.10ld \t %s\
  %f", w, x, y, z );

multiline.pattern: '\\$'
multiline.negate: false
multiline.match: before

 

时间戳

[2015-08-24 11:49:14,389][INFO ][env                      ] [Letha] using [1] data paths, mounts [[/
(/dev/disk1)]], net usable_space [34.5gb], net total_space [118.9gb], types [hfs]

multiline.pattern: '^\[[0-9]{4}-[0-9]{2}-[0-9]{2}'
multiline.negate: true
multiline.match: after

 

应用日志

[2015-08-24 11:49:14,389] Start new event
[2015-08-24 11:49:14,395] Content of processing something
[2015-08-24 11:49:14,399] End event

multiline.pattern: 'Start new event'
multiline.negate: true
multiline.match: after
multiline.flush_pattern: 'End event'

 

总结

pattern：正则表达式   https://www.elastic.co/guide/en/beats/filebeat/7.x/regexp-support.html

negate：正则表达式是否正向生效 true：符合正则表达式的为一个基准行。 false：不符合表达式的为一个基准行。

match：基准行和后面after或前面before划分为一组