json_v2 fails if input data contains null values

[igomura]

Relevent telegraf.conf

[[inputs.file]]
  files = ["config.json"]
  data_format = "json_v2"

  [[inputs.file.json_v2]]
    measurement_name = "info.config"
    [[inputs.file.json_v2.object]]
      path = "config"

Logs from Telegraf

2021-12-30T21:56:57Z E! [inputs.file] Error in plugin: unknown format '' for field 'storage_redis_caCertificates'

System info

telegraf-1.19.0-0.1.x86_64, CentOS 7

Docker

No response

Steps to reproduce

Input data file:
{ "config": { "apikey": "*", "ipAddressEnabled": true, "initialization": { "timeoutMS": 10000, "forceFreshStartup": false }, "storage": { "type": "redis", "redis": { "host": "localhost", "port": 6379, "tlsServerName": "", "caCertificates": null, "tlsSkipNameValidation": false, "tlsClientCertificate": "", "tlsClientKey": "" } } } }

Expected behavior

parsed data

Actual behavior

the plugin fail to read data when one of json attributes has a value null
In my example this is "caCertificates": null

Additional info

No response

[powersj]

This looks like a fix for null in json_v2 parser was in #9368 which did go out in https://github.com/influxdata/telegraf/releases/tag/v1.19.0

Are you sure you are running 1.19.0?

I was unable to reproduce this with master:

❯ ./telegraf --config config.toml 
2022-01-04T16:12:13Z I! Starting Telegraf 1.22.0-aee26768
2022-01-04T16:12:13Z I! Loaded inputs: file
2022-01-04T16:12:13Z I! Loaded aggregators: 
2022-01-04T16:12:13Z I! Loaded processors: 
2022-01-04T16:12:13Z I! Loaded outputs: file
2022-01-04T16:12:13Z I! Tags enabled: host=ryzen
2022-01-04T16:12:13Z I! [agent] Config: Interval:10s, Quiet:false, Hostname:"ryzen", Flush Interval:10s
info.config,host=ryzen apikey="*",ipAddressEnabled=true,initialization_timeoutMS=10000,initialization_forceFreshStartup=false,storage_type="redis",storage_redis_host="localhost",storage_redis_port=6379,storage_redis_tlsServerName="",storage_redis_tlsSkipNameValidation=false,storage_redis_tlsClientCertificate="",storage_redis_tlsClientKey="" 1641312740000000000

So I am going to go ahead and close this as I think getting a newer version of Telegraf is your best bet.