Backslashes in the query string not supported?

[Dom-nik]

• Version: ES/Logstash 5.0.2, plugin: 3.1.0
• Operating System: CentOS 7
• Config File (the query I used is in the comment):

  
  input {
      elasticsearch {
              hosts => "10.x.y.z:9200"
              index => "data_for_mapping_test"
              query => '
  {
  "query": {
  "term": {
    "_id": {
      "value": "1"
    }
  }
  }
  }
  '
      }
  }

filter { elasticsearch { hosts => ["10.x.y.z:9200"] index => "mappings" query_template => "/etc/logstash/conf.d/mapping_test.dsl"

query => '{ "query": { "term": { "AssetType": "%{AssetType}"} } }'

          fields => {"AssetTypeGrouping" => "AssetTypeGroupingMapped"}
          enable_sort => false
 }

}

output { elasticsearch { hosts => ["10.x.y.z:9200"] index => "mappings_test" } }

- Sample Data:
My input data contains a field like this: `"AssetType":"\\Demo\\Something"`
My `mappings` index contains documents like this:
```json
{
        "AssetType": "\\Demo\\Something",
        "AssetTypeGrouping": "marketing assets"
}

• Steps to Reproduce: Run the pipe ;]
• Error:

:error=>#<LogStash::Json::ParserError: Unrecognized character escape 'D' [...]

NOTE: It helped (worked as expected) when I added the following step in the query parsing in the plugin code:

query_tmp = event.sprintf(@query_dsl).gsub!('\\', '\\\\\\')

So it seems that the query parser doesn't understand backslashes in the query string. Is it the solution or am I doing something completely stupid?

[webmat]

Sorry about the delay here :-(

Did the fix in ElasticSearch help with the issue on the Logstash side?