Filter issue with logstash beta 2.0

I can't reproduce what you're seeing.

$ cat test.config 
input { stdin {} }
output { stdout { codec => rubydebug } }
filter {
  grok {
    match => [
      "message",
      "%{NUMBER:siteid};%{IP:usersip};%{TIMESTAMP_ISO8601:signdate}"
    ]
  }
}
$ cat data 
1;127.0.0.1;2014-06-22T12:32:35
$ /opt/logstash/bin/logstash -f test.config < data
Logstash startup completed
{
       "message" => "1;127.0.0.1;2014-06-22T12:32:35",
      "@version" => "1",
    "@timestamp" => "2015-10-21T11:07:36.109Z",
          "host" => "lnxolofon",
        "siteid" => "1",
       "usersip" => "127.0.0.1",
      "signdate" => "2014-06-22T12:32:35"
}
Logstash shutdown completed