我继承了一个logstash配置，如下所示。我不想做大的改动，因为我不想破坏任何正在工作的东西。指标以json的日志形式发送，格式为-“metric”：“度量名称”，“值”：“int”。这一直运行得很好。但是，新指标的值中需要有一个字符串。它并不是真正的指标，而是用字符串表示处理的状态。根据以下过滤器，它将所有内容转换为整数，值中的任何字符串都将转换为0。要求是，如果值是字符串，则不应尝试转换。谢谢！

input {
      beats {
        port => 5044
      }
    }

    filter {
        grok {
           match => { "message" => "%{TIMESTAMP_ISO8601:ts} - M_%{DATA:task}_%{NUMBER:thread} - INFO - %{GREEDYDATA:jmetric}"}
           remove_field => [ "message", "ecs", "original", "agent", "log", "host", "path" ]
           break_on_match => false
        }

        if "_grokparsefailure" in [tags] {
            drop {}
        }

        date {
           match => ["ts", "ISO8601"]
           target => "@timestamp"
        }

        json {
            source => "jmetric"
            remove_field => "jmetric" 
        } 

        split {
            field => "points"
            add_field => {
                "metric" => "%{[points][metric]}"
                "value" => "%{[points][value]}"
            }
            remove_field => [ "points", "event", "tags", "ts", "stream", "input" ]
        }

        mutate {
            convert => { "value" => "integer" }
            convert => { "thread" => "integer" }
        }
    }