logstash.filter.kv Exception while parsing kv 解决办法

kv {
        source => "custmsg"
        field_split => ","
        value_split => "="
    }

mutate {  
           gsub => [
                    "custmsg","\n", "" ,
                    "custmsg","\r", ""
                   ]  
           }

filter {
    mutate {
        rename => ["syslog_host", "host"]
    }
}

filter {
    mutate {
        replace => { "message" => "%{source_host}: My new message" }
    }
}

filter {
    mutate {
        replace => { "message" => "%{source_host}: My new message" }
    }
}

filter {
    mutate {
        convert => ["request_time", "float"]
    }
}

filter {
    mutate {
        gsub => [
            # replace all forward slashes with underscore
            "fieldname", "/", "_",
            # replace backslashes, question marks, hashes, and minuses
            # with a dot "."
            "fieldname2", "[\\?#-]", "."
        ]
    }
}

filter {
    mutate {
        uppercase => [ "fieldname" ]
    }
}

filter {
    mutate {
        split => ["message", "|"]
    }
}

{
    "message" => [
        [0] "123",
        [1] "321",
        [2] "adfd",
        [3] "dfjld*=123"
    ],
    "@version" => "1",
    "@timestamp" => "2014-08-20T15:58:23.120Z",
    "host" => "raochenlindeMacBook-Air.local"
}

filter {
    mutate {
        strip => ["field1", "field2"]
    }
}

filter {
    mutate {
        remove_field => [ "foo_%{somefield}" ]
    }
}

filter {
    mutate {
        split => ["message", "|"]
    }
    mutate {
        join => ["message", ","]
    }
}

{
    "message" => "123,321,adfd,dfjld*=123",
    "@version" => "1",
    "@timestamp" => "2014-08-20T16:01:33.972Z",
    "host" => "raochenlindeMacBook-Air.local"
}

filter {
    mutate {
        merge => [ "dest_field", "added_field" ]
    }
}