Bug reporting - stack level too deep ec2_metadata.rb

[azman0101]

With this configuration:

    <match **>
      @type ec2_metadata

      # aws_key_id  YOUR_AWS_KEY_ID
      # aws_sec_key YOUR_AWS_SECRET/KEY

      metadata_refresh_seconds 300 # Optional, default 300 seconds
      imdsv2 false                  # Optional, default false

      output_tag ${availability_zone}.${tag}
    </match>

I get this error:

#<Thread:0x00007fb5331ed648@event_loop@/var/lib/gems/2.5.0/gems/fluentd-1.9.2/lib/fluent/plugin_helper/thread.rb:70 run> terminated with exception (report_on_exception is true):
/var/lib/gems/2.5.0/gems/fluent-plugin-ec2-metadata-0.1.3/lib/fluent/plugin/ec2_metadata.rb:156:in `each': stack level too deep (SystemStackError)
	from /var/lib/gems/2.5.0/gems/fluent-plugin-ec2-metadata-0.1.3/lib/fluent/plugin/ec2_metadata.rb:156:in `each_with_index'
	from /var/lib/gems/2.5.0/gems/fluent-plugin-ec2-metadata-0.1.3/lib/fluent/plugin/ec2_metadata.rb:156:in `prepare_placeholders'
	from /var/lib/gems/2.5.0/gems/fluent-plugin-ec2-metadata-0.1.3/lib/fluent/plugin/ec2_metadata.rb:131:in `modify'
	from /var/lib/gems/2.5.0/gems/fluent-plugin-ec2-metadata-0.1.3/lib/fluent/plugin/out_ec2_metadata.rb:23:in `block in process'
	from /var/lib/gems/2.5.0/gems/fluentd-1.9.2/lib/fluent/event.rb:110:in `each'
	from /var/lib/gems/2.5.0/gems/fluent-plugin-ec2-metadata-0.1.3/lib/fluent/plugin/out_ec2_metadata.rb:22:in `process'
	from /var/lib/gems/2.5.0/gems/fluentd-1.9.2/lib/fluent/plugin/output.rb:797:in `emit_sync'
	from /var/lib/gems/2.5.0/gems/fluentd-1.9.2/lib/fluent/event_router.rb:97:in `emit_stream'
	 ... 2617 levels...
	from /var/lib/gems/2.5.0/gems/cool.io-1.6.0/lib/cool.io/loop.rb:88:in `run_once'
	from /var/lib/gems/2.5.0/gems/cool.io-1.6.0/lib/cool.io/loop.rb:88:in `run'
	from /var/lib/gems/2.5.0/gems/fluentd-1.9.2/lib/fluent/plugin_helper/event_loop.rb:93:in `block in start'
	from /var/lib/gems/2.5.0/gems/fluentd-1.9.2/lib/fluent/plugin_helper/thread.rb:78:in `block in thread_create'
2020-02-21 14:46:35 +0000 [error]: unexpected error error_class=SystemStackError error="stack level too deep"

gem 'activesupport', '6.0.2.1'
gem 'fluentd', '1.8.1'
gem 'fluent-plugin-concat', '2.4.0'
gem 'fluent-plugin-detect-exceptions', '0.0.13'
gem 'fluent-plugin-elasticsearch', '3.8.0'
gem 'fluent-plugin-kubernetes_metadata_filter', '2.4.1'
gem 'fluent-plugin-multi-format-parser', '1.0.0'
gem 'fluent-plugin-prometheus', '1.7.0'
gem 'fluent-plugin-systemd', '1.0.2'
gem 'fluent-plugin-grok-parser', '2.6.1'
gem 'fluent-plugin-rewrite-tag-filter', '2.2.0'
gem 'fluent-plugin-kinesis', '3.2.0'
gem 'oj', '3.10.1'

Regards