Process.name incomplete

Somehow the process name gets cut off and i end up with process.name like "ansible-playboo" instead of "ansible-playbook"

It seems tat the name is cut off after the 15th character

I checked the mapping for process.name:

GET metricbeat-7.9.1-000008/_mapping/field/process.name

{
  "metricbeat-7.9.1-000008" : {
    "mappings" : {
      "process.name" : {
        "full_name" : "process.name",
        "mapping" : {
          "name" : {
            "type" : "keyword",
            "fields" : {
              "text" : {
                "type" : "text",
                "norms" : false
              }
            },
            "ignore_above" : 1024
          }
        }
      }
    }
  }
}

Can't see anything wrong... Any clues what the issue is?

Hello! Are you using the metricbeat system module in this case? Could you share your config for the module please? Thank you!

here it is:

# Module: system
# Docs: https://www.elastic.co/guide/en/beats/metricbeat/7.8/metricbeat-module-system.html

- module: system
  period: 10s
  metricsets:
    - cpu
    - load
    - memory
    - network
    - process
    - process_summary
    - socket_summary
    #- entropy
    #- core
    #- diskio
    #- socket
    #- service
    #- users
  process.include_top_n:
    by_cpu: 5      # include top 5 processes by CPU
    by_memory: 5   # include top 5 processes by memory

- module: system
  period: 1m
  metricsets:
    - filesystem
    - fsstat
  processors:
  - drop_event.when.regexp:
      system.filesystem.mount_point: '^/(sys|cgroup|proc|dev|etc|host|lib|snap)($|/)'

- module: system
  period: 15m
  metricsets:
    - uptime

#- module: system
#  period: 5m
#  metricsets:
#    - raid
#  raid.mount_point: '/'

An example document:

{
  "_index": "metricbeat-7.9.2-000003",
  "_type": "_doc",
  "_id": "t4k3J3UBGS9yby_KINOp",
  "_version": 1,
  "_score": null,
  "_source": {
    "@version": "1",
    "ecs": {
      "version": "1.5.0"
    },
    "tags": [
      "beats_input_raw_event"
    ],
    "service": {
      "type": "system"
    },
    "process": {
      "args": [
        "/usr/bin/python2",
        "/usr/bin/ansible-playbook",
        "--ask-vault-pass",
        "-i",
        "inventories/dev",
        "--skip-tags",
        "debug",
        "--tags",
        "install",
        "-e",
        "",
        "playbooks/filebeat.yml"
      ],
      "pid": 9628,
      "ppid": 9626,
      "pgid": 9606,
      "name": "ansible-playboo"
    },
    "metricset": {
      "period": 10000,
      "name": "process"
    },
    "system": {
      "process": {
        "memory": {
          "share": 5541888,
          "size": 467177472,
          "rss": {
            "pct": 0.002,
            "bytes": 66600960
          }
        },
        "state": "running",
        "cpu": {
          "start_time": "2020-10-14T13:04:14.000Z",
          "total": {
            "pct": 0.4792,
            "norm": {
              "pct": 0.0599
            },
            "value": 20800
          }
        },
        "cmdline": "/usr/bin/python2 /usr/bin/ansible-playbook --ask-vault-pass -i inventories/dev --skip-tags debug --tags install -e  playbooks/filebeat.yml"
      }
    },
    "@timestamp": "2020-10-14T13:05:24.435Z",
    "user": {
      "name": "faadmin"
    },
    "host": {
      "architecture": "x86_64",
      "hostname": "my_kibana_server",
      "ip": [
        "10.128.113.8",
        "fe80::250:56ff:fe3e:724"
      ],
      "mac": [
        "00:50:56:3e:07:24"
      ],
      "name": "my_kibana_server",
      "os": {
        "family": "redhat",
        "version": "7.9 (Maipo)",
        "codename": "Maipo",
        "name": "Red Hat Enterprise Linux Server",
        "platform": "rhel",
        "kernel": "3.10.0-1160.2.1.el7.x86_64"
      },
      "containerized": false,
      "id": "30f130795bbc40239af1345f312f1319"
    },
    "event": {
      "module": "system",
      "duration": 63018385,
      "dataset": "system.process"
    },
    "agent": {
      "hostname": "my_kibana_server",
      "name": "my_kibana_server",
      "type": "metricbeat",
      "version": "7.9.2",
      "ephemeral_id": "dd4c76bf-42a5-40b4-b5f9-5546a3aab142",
      "id": "780381de-2def-4cdb-9df0-3e7806ebcf96"
    }
  },
  "fields": {
    "system.process.cpu.start_time": [
      "2020-10-14T13:04:14.000Z"
    ],
    "@timestamp": [
      "2020-10-14T13:05:24.435Z"
    ]
  },
  "highlight": {
    "process.name": [
      "@kibana-highlighted-field@ansible-playboo@/kibana-highlighted-field@"
    ],
    "mongodb.status.process": [
      "@kibana-highlighted-field@ansible-playboo@/kibana-highlighted-field@"
    ]
  },
  "sort": [
    1602680724435
  ]
}

there has been a similar issue in the past: