Autodiscover + Docker decoding JSON: EOF

Elastic Stack Beats
1

Hi,

i am trying to get some nginx-logs from the container shipped to elasticsearch... but i am getting some json-decoding errors using filebeat 6.2.3.
Weird thing is, these errors apper for already running containers.
If i start a new nginx:alpine container the logs appear just fine...

filebeat.autodiscover:
  providers:
    - type: docker
      templates:
        - condition:
            contains:
              docker.container.name: "nginx"
          config:
            - module: nginx
              access:
                prospector:
                  type: docker
                  containers.stream: stdout
                  containers.ids:
                    - "${data.docker.container.id}"
              error:
                prospector:
                  type: docker
                  containers.stream: stderr
                  containers.ids:
                    - "${data.docker.container.id}"

|2018-04-03T19:10:23.701+0200|INFO|log/harvester.go:216|Harvester started for file: /var/lib/docker/containers/5ca40e68ff704127f3a8994912c67cdea77c50d9d6a4a99dd6e2fa5f3b433a19/5ca40e68ff704127f3a8994912c67cdea77c50d9d6a4a99dd6e2fa5f3b433a19-json.log|
|---|---|---|---|
|2018-04-03T19:10:23.701+0200|INFO|log/harvester.go:216|Harvester started for file: /var/lib/docker/containers/5ca40e68ff704127f3a8994912c67cdea77c50d9d6a4a99dd6e2fa5f3b433a19/5ca40e68ff704127f3a8994912c67cdea77c50d9d6a4a99dd6e2fa5f3b433a19-json.log|
|2018-04-03T19:10:23.701+0200|ERROR|log/harvester.go:243|Read line error: decoding docker JSON: EOF; File: %!(EXTRA string=/var/lib/docker/containers/5ca40e68ff704127f3a8994912c67cdea77c50d9d6a4a99dd6e2fa5f3b433a19/5ca40e68ff704127f3a8994912c67cdea77c50d9d6a4a99dd6e2fa5f3b433a19-json.log)|
|2018-04-03T19:10:23.701+0200|ERROR|log/harvester.go:243|Read line error: decoding docker JSON: EOF; File: %!(EXTRA string=/var/lib/docker/containers/5ca40e68ff704127f3a8994912c67cdea77c50d9d6a4a99dd6e2fa5f3b433a19/5ca40e68ff704127f3a8994912c67cdea77c50d9d6a4a99dd6e2fa5f3b433a19-json.log)|
2

What version of docker are you using? Is the problem easily reproducible or it only happens from time to time?

3

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