java error : EmptyMap cannot be cast to org.logstash.ConvertedList

[lovasoa]

Hello,
I have a java error when I try to start logstash with geoip

Stacktrace

[2018-03-27T21:13:21,375][ERROR][logstash.pipeline        ] Exception in pipelineworker, the pipeline stopped processing new events, please check your filter configuration and restart Logstash.

{

:pipeline_id=>"main",

 "exception"=>"java.util.Collections$EmptyMap cannot be cast to org.logstash.ConvertedList", 

"backtrace"=>[
"org.logstash.Accessors.setChild(org/logstash/Accessors.java:107)", 
"org.logstash.Accessors.set(org/logstash/Accessors.java:16)",
"org.logstash.Event.setField(org/logstash/Event.java:159)", 
"org.logstash.Event.setField(org/logstash/Event.java:150)", 
"org.logstash.filters.GeoIPFilter.applyGeoData(org/logstash/filters/GeoIPFilter.java:185)", 
"org.logstash.filters.GeoIPFilter.handleEvent(org/logstash/filters/GeoIPFilter.java:167)", 
"java.lang.reflect.Method.invoke(java/lang/reflect/Method.java:498)", 
"org.jruby.javasupport.JavaMethod.invokeDirectWithExceptionHandling(org/jruby/javasupport/JavaMethod.java:453)", 
"org.jruby.javasupport.JavaMethod.invokeDirect(org/jruby/javasupport/JavaMethod.java:314)", 
"RUBY.filter(/usr/share/logstash/vendor/bundle/jruby/2.3.0/gems/logstash-filter-geoip-5.0.3-java/lib/logstash/filters/geoip.rb:111)", 
"RUBY.do_filter(/usr/share/logstash/logstash-core/lib/logstash/filters/base.rb:145)", 
"RUBY.block in multi_filter(/usr/share/logstash/logstash-core/lib/logstash/filters/base.rb:164)", 
"org.jruby.RubyArray.each(org/jruby/RubyArray.java:1734)", 
"org.jruby.RubyArray$INVOKER$i$0$0$each.call(org/jruby/RubyArray$INVOKER$i$0$0$each.gen)", 
"RUBY.multi_filter(/usr/share/logstash/logstash-core/lib/logstash/filters/base.rb:161)", 
"RUBY.multi_filter(/usr/share/logstash/logstash-core/lib/logstash/filter_delegator.rb:47)", 
"RUBY.block in filter_func((eval):94)", "org.jruby.RubyProc.call(org/jruby/RubyProc.java:289)", 
"RUBY.filter_batch(/usr/share/logstash/logstash-core/lib/logstash/pipeline.rb:447)", 
"RUBY.worker_loop(/usr/share/logstash/logstash-core/lib/logstash/pipeline.rb:426)", 
"RUBY.block in start_workers(/usr/share/logstash/logstash-core/lib/logstash/pipeline.rb:385)", 
"org.jruby.RubyProc.call(org/jruby/RubyProc.java:289)", 
"org.jruby.RubyProc.call(org/jruby/RubyProc.java:246)", 
"java.lang.Thread.run(java/lang/Thread.java:748)"],

:thread=>"#<Thread:0xe35c8cb@/usr/share/logstash/logstash-core/lib/logstash/pipeline.rb:246 sleep>"
}

System info

• Version: 6.2.3
• Operating System: Fedora 27
• Config File :

input {
  http {
    port => 9494
    codec => json
  }
}

filter {
  geoip {
    source => "host"
    target => "[@metadata][geoip]"
  }
  date {
    match => [ "time", "MMM dd, YYYY HH:mm:ss", "ISO8601"]
    locale => "en_US"
    timezone => "%{[@metadata][geoip][timezone]}"
  }
  if ![location] {
    mutate {
       copy => { "[@metadata][geoip][location]" => "location" }
    }
  }
}

output {
  elasticsearch {
    index => "ruuvi_station_logstash_%{+YYYY.MM.dd}"
    document_type => "_doc"
  }
}

• Sample Data:

{
    "tag": {
      "temperature": 16.2,
      "updateAt": "Mar 27, 2018 20:47:16",
      "voltage": 2.959,
      "accelX": 0.012,
      "favorite": true,
      "id": "...",
      "pressure": 1000.66,
      "humidity": 55,
      "rawDataBlob": {
        "blob": []
      },
      "gatewayUrl": "...",
      "accelY": 0.052,
      "name": "balcon",
      "accelZ": 1.036,
      "defaultBackground": 2,
      "rssi": -74
    },
    "time": "Mar 27, 2018 20:47:16",
    "@version": "1",
    "deviceId": "...",
    "@timestamp": "2018-03-27T18:47:16.000Z",
    "host": "87.116.17.19",
    "headers": {
      "http_user_agent": "...",
      "http_host": "...",
      "http_accept": "*/*",
      "content_type": "application/json",
      "http_accept_encoding": "gzip, deflate",
      "request_path": "/",
      "content_length": "477",
      "request_method": "POST",
      "request_uri": "/",
      "http_connection": "keep-alive",
      "http_version": "HTTP/1.1"
    },
    "eventId": "..."
  }

[lovasoa]

See:

logstash-filter-geoip/src/main/java/org/logstash/filters/GeoIPFilter.java

Line 176 in a251675

event.setField(targetField, Collections.emptyMap());