# Aggregation error - nil can't be coerced into Fixnum

**URL:** <https://discuss.elastic.co/t/aggregation-error-nil-cant-be-coerced-into-fixnum/168678>\
**Category:** Logstash\
**Created:** [February 16, 2019, 10:09am UTC](https://discuss.elastic.co/t/aggregation-error-nil-cant-be-coerced-into-fixnum/168678 "2019-02-16T10:09:43Z")\
**Posts on this page:** 1\
**Showing post:** 11

<div class="post-metadata">

**Author:** ![Badger](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/badger/32/25190_2.png) [@Badger](https://discuss.elastic.co/u/Badger)\
**Post date:** [February 20, 2019, 10:15pm UTC](https://discuss.elastic.co/t/aggregation-error-nil-cant-be-coerced-into-fixnum/168678/11 "2019-02-20T22:15:29Z")

</div>

Nothing will trigger the aggregation being pushed as an event in that case. I think the minimum that will work is below. I created a file that contains

```
{ "INCIDENTE" : 0 }

```

Then I run with this configuration

```
input { file { path => "/home/user/foo.json" sincedb_path => "/dev/null" start_position => "beginning" } }
filter {
    json { source => "message" }
    aggregate {
                task_id => "%{INCIDENTE}"
                code => "
                     map['JustTesting'] ||= 0; map['JustTesting'] += 1
                "
                push_map_as_event_on_timeout => true
                inactivity_timeout => 2

     }
}
output { stdout { codec => rubydebug } }

```

Using a file input is important, because if you a generator the pipeline will stop executing, and there will be no thread running that can execute the timeout code. That config gets me

```auto
[2019-02-20T17:09:24,994][INFO][logstash.agent] Pipelines running {:count=>1, :running_pipelines=>[:main], :non_running_pipelines=>[]}
{
    "@timestamp" => 2019-02-20T22:09:24.992Z,
     "INCIDENTE" => 0,
          "path" => "/home/user/foo.json",
       "message" => "{ \"INCIDENTE\" : 0 }",
      "@version" => "1"
}
{
     "@timestamp" => 2019-02-20T22:09:30.075Z,
    "JustTesting" => 1,
       "@version" => "1"
}

```

If on the other hand I use a generator input

```
input { generator { count => 1 message => '{ "INCIDENTE" : 0 }' } }

```

Then with that same filter I get

```auto
[2019-02-20T17:14:15,587][INFO][logstash.agent] Pipelines running {:count=>1, :running_pipelines=>[:main], :non_running_pipelines=>[]}
{
    "@timestamp" => 2019-02-20T22:14:15.565Z,
      "sequence" => 0,
     "INCIDENTE" => 0,
       "message" => "{ \"INCIDENTE\" : 0 }",
      "@version" => "1"
}
[2019-02-20T17:14:15,734][INFO][logstash.pipeline] Pipeline has terminated {:pipeline_id=>"main", :thread=>"#<Thread:0x3765a362 run>"}

```

with no aggregation.

---

_[View the full topic](https://discuss.elastic.co/t/aggregation-error-nil-cant-be-coerced-into-fixnum/168678)._