vector: Memory leak in 0.8.2

data_dir = "/var/lib/vector"

# Debug only
#[sources.stdin]
#  type = "stdin"
#[sinks.stdout]
#  inputs   = []
#  type     = "console"
#  encoding = "json"


# Input data
[sources.nginx_log]
  # General
  type = "file"
  include = ["/var/log/nginx/monitoring.log"]
  ignore_older = 3600 # optional, no default, seconds
  start_at_beginning = false # optional, default
  # Priority
  oldest_first = false # optional, default
  # Fingerprinting, how the file source should identify files and changes
  fingerprinting.strategy = "device_and_inode"
  # An approximate limit on the amount of data read from a single file at a given time
  max_read_bytes = 102400

[transforms.nginx_parsed_log]
  # General
  type = "regex_parser" # required
  inputs = ["nginx_log"] # required
  # Classic access_log
  #regex = '^(?P<client_ip>[\w+\.:]+) - [-\w]+ \[(?P<timestamp>.*)\] "(.*?)" (?P<code>\d+) (?P<bytes>\d+).*'
  # Monitoring format - remote_addr [time_local] status body_bytes_sent request_time request_length host
  regex =  '^(?P<client_ip>[\w+\.:]+) \[(?P<timestamp>.*)\] (?P<code>\d+) (?P<bytes>\d+) (?P<request_time>[\d\.]+) (?P<request_length>\d+) (?P<host>.*)'
  drop_field = true # optional, default
  field = "message" # optional, default
  # Types
  #types.client_ip = "string"
  #types.timestamp = "timestamp|%d/%b/%Y:%T %z"
  types.code = "int"
  #types.bytes = "int"
  types.request_time = "float"
  #types.request_length = "int"
  #types.host = "string"


[transforms.nginx_parsed_log_to_metric]
  inputs = ["nginx_parsed_log"]
  type = "log_to_metric"

  [[transforms.nginx_parsed_log_to_metric.metrics]]
    type = "counter"
    field = "code"
    name = "http_requests_total"
    tags.code = "{{ code }}"
    #tags.host = "{{ host }}"

  [[transforms.nginx_parsed_log_to_metric.metrics]]
    type = "histogram"
    field = "request_time"
    name = "http_request_duration_seconds"
    #tags.host = "{{ host }}"

# Output data
[sinks.prometheus]
  type = "prometheus" # required
  inputs = ["nginx_parsed_log_to_metric"] # required
  address = "0.0.0.0:9598" # required
  namespace = "" # required
  flush_period_secs = 15 # optional, default, seconds