将MySQL值转换为建议字段上的嵌套elasticsearch属性时出现Logstash错误 [英] Logstash error when converting MySQL value to nested elasticsearch property on suggestion field

问题描述

在这里寻求帮助的呼声很高，当我尝试使用Logstash将MySQL值转换为嵌套的Elasticsearch字段时，出现以下错误.

A Huge cry for help here, When i try to convert a MySQL value to a nested elasticsearch field using logstash i get the following error.

{"exception"=>"expecting List or Map, found class org.logstash.bivalues.StringBiValue", "backtrace"=>["org.logstash.Accessors.newCollectionException(Accessors.java:195)"

使用以下配置文件:

input {
    jdbc {
        jdbc_driver_library => "/logstash/mysql-connector-java-5.1.42-bin.jar"
        jdbc_driver_class => "com.mysql.jdbc.Driver"
        jdbc_connection_string => "jdbc:mysql://localhost:3306/data"
        jdbc_user => "username"
        jdbc_password => "password"
        statement => "SELECT id, suggestions, address_count FROM `suggestions` WHERE id <= 100"
        jdbc_paging_enabled => "true"
        jdbc_page_size => "50000"
    }
}
filter {
  mutate {
  rename => { 'address_count' => '[suggestions][payload][count]' }
  }
}
output {
    elasticsearch {
    hosts => [
        "localhost:9200"
    ]
        index => "dev_suggestions"
        document_type => "address"
    }
}

但是，如果我将address_count重命名为我的映射中尚未存在的字段，那么它可以正常工作，并且可以将值正确地添加为嵌套属性，我已经尝试了在我的其他字段中使用索引，而不仅仅是Recommendations.payloads.address_count，我遇到了同样的问题，仅当未在映射中定义字段时，它才有效.

However if i rename address_count to a field that is not already in my mapping, Then it works just fine and it correctly adds the value as a nested property, I have tried on other fields in my index and not just suggestions.payloads.address_count and i get the same issue, It only works if the field has not been defined in the mapping.

这使我感到有些头疼，如果有人可以帮助我解决这个问题，我将不胜感激，因为我花了最后48个小时在桌子上敲打我的头！

This has caused me some serious headaches and if anyone could help me out to overcome this issue i would greatly appreciate it as Ive spent the last 48 hours banging my head on the table!

我最初以为我可以通过MySQL查询执行以下操作:

I initially assumed i could do the following with a MySQL query:

SELECT id, suggestion, '[suggestions][payload][count]' FROM `suggestions` WHERE id <= 100

然后我也尝试过

SELECT id, suggestion, 'suggestions.payload.count' FROM `suggestions` WHERE id <= 100

两者都无法使用后面的选项插入值，从而导致一个错误，即字段不能包含点.

Both failed to insert the value with the later option giving an error that a field can not contain dots.

最后是映射:

{
  "mappings": {
    "address": {
      "properties": {
        "suggestions": {
          "type": "completion",
          "payloads" : true
        }
      }
    }
  }
}

---

感谢Val -对于与我本人处于相同情况的未来用户，需要使用logstash将MySQL数据转换为嵌套的Elasticsearch对象，这是使用Logstash 5和Elasticsearch的有效解决方案2.*

---

Thanks to Val - and for future users in the same situation as myself that need to convert MySQL data into nested Elasticsearch objects using logstash, Here is a working solution using Logstash 5 and Elasticsearch 2.*

input {
    jdbc {
        jdbc_driver_library => "/logstash/mysql-connector-java-5.1.42-bin.jar"
        jdbc_driver_class => "com.mysql.jdbc.Driver"
        jdbc_connection_string => "jdbc:mysql://localhost:3306/data"
        jdbc_user => "username"
        jdbc_password => "password"
        statement => "SELECT addrid, suggestion, address_count FROM `suggestions` WHERE id <= 20"
        jdbc_paging_enabled => "true"
        jdbc_page_size => "50000"
    }
}

filter {
  ruby {
       code => "
           event.set('[suggestions][input]', event.get('suggestion'))
           event.set('[suggestions][payload][address_count]', event.get('address_count'))
           event.set('[v][payload][id]', event.get('addrid'))
       "
       remove_field => [ 'suggestion', 'address_count', 'addrid' ]
  }
}

output {
    elasticsearch {
        hosts => [
            "localhost:9200"
        ]
        index => "dev_suggestions"
        document_type => "address"
    }
}

推荐答案

我认为您需要以不同的方式进行.首先，我将SQL查询中的suggestions字段重命名为其他名称，然后根据从SQL查询中获得的值构建suggestions对象.

I think you need to proceed differently. First, I would rename the suggestions field in your SQL query to something else and then build the suggestions object from the values you get from your SQL query.

    statement => "SELECT id, suggestion, address_count FROM `suggestions` WHERE id <= 100"

然后，您可以使用ruby过滤器(并删除mutate一个)来构建您的suggestions字段，如下所示:

Then you could use a ruby filter (and remove your mutate one) in order to build your suggestions field, like this:

Logstash 2.x代码:

Logstash 2.x code:

ruby {
     code => "
         event['suggestions']['input'] = event['suggestion']
         event['suggestions']['payload']['count'] = event['address_count']
     "
     remove_field => [ 'suggestion', 'address_count' ]
}

Logstash 5.x代码:

Logstash 5.x code:

ruby {
     code => "
         event.set('[suggestions][input]', event.get('suggestion'))
         event.set('[suggestions][payload][count]', event.get('address_count'))
     "
     remove_field => [ 'suggestion', 'address_count' ]
}

PS:所有这些都假设您正在使用ES 2.x，因为payload字段在ES 5.x中已消失

PS: All this assumes you're using ES 2.x since the payload field has disappeared in ES 5.x

这篇关于将MySQL值转换为建议字段上的嵌套elasticsearch属性时出现Logstash错误的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！