Logstash runs out of memory

Hello,

Here is the issue: My logstash conf file is not sending files to Elasticsearch when it's full:

filter{
        json {
                source => "message"
                remove_field =>[ "message" ]

        }

        ruby {
        path => '/etc/logstash/conf.d/splitData.rb'
        script_params => { field => "activeAlarms" target => "activeAlarms"  }
}
ruby {
        code => '
            a = []
            event.get("alarmMetadata").each { |k, v|
                h = Hash.new
                h["alarmLevel"] = k
                h["alarmValue"] = v
                a << h
            }
            event.remove("alarm")
            event.set("alarm", a)
        '
    }

    split { field => "alarm" }


split{field=> "entities"}

if "tele" in [entities][sdn]{
        mutate{add_field=>["ServerType","tele"] }
}
if "ntf" in [entities][sdn]{
        mutate{add_field=>["ServerType" ,"ntf"]}
}
if "db-access" in [entities][sdn]{
        mutate{add_field=>["ServerType","db-access"]}
}
if "storage" in [entities][sdn]{
        mutate{add_field=>["ServerType","storage"]}
}
if "diag" in [entities][sdn]{
        mutate{add_field=>["ServerType","diag"]}
}
if "ops" in [entities][sdn]{
        mutate {add_field=>["ServerType","ops"]}
}
mutate {
    rename => { "scope" => "Server" }
  }


grok {
    match => {"[entities][sdn]" => "(?<VM_number>(vm)[0-9])"}
}
mutate{add_field => {
    "new_Objld" => "%{Server} %{ServerType} %{VM_number}"
  }}
mutate {convert => {"ServerType" => "string"}}

}

BUT, when I comment the second ruby part, it does work. Then, when I do another filter with the two ruby parts and none of the remaining, the filter also works. The only reason I see is that I create too much splits etc and logstash ends up running out of memory, but maybe you can find another reason and even a way to make this works :smile:
I get this error:
Dumping heap to java_pid 27510.hprof ... Heap dump file created [3015426727 bytes in 109.318 secs]

PS: the script used in the second ruby part is :

def register(params)
    @field = params['field']
    @target = params['target']
end

def filter(event)
    data = event.get(@field)
    event.remove(@field)
    a = []
    data.each { |x|
        e = event.clone
        e.set(@target, x)
        a << e
    }
    a
end

thanks in advance