logstash grok cannot parse [ ]

Description

the log like this
[2014-01-20 13:47:24,310]
I use
[%{DATESTAMP:timestamp}] is report grokfailure
when I change grok pattern to
.%{DATESTAMP:timestamp}. is work find
this is same in grep filter, I cannot use filter to grep the bracket
https://gist.github.com/huhongbo/8515632
seems jira cannot show the "forward slash" , so I put the text to gist

Assignee

Logstash Developers

Reporter

hongbo hu

Labels

None

Affects versions

Configure