error_class="Elasticsearch::Transport::Transport::Error" error ="Cannot get new connection from pool

[elain ding]

Hello everyone

I now deployed in the AWS EC2 td-agent, used to collect logs send to elasticsearch, found every about 6 hours, the log can not be normal collection, the newspaper is as follows:

#################################################

2015-11-11 18:06:37 +0800 [warn]: temporarily failed to flush the buffer. next_retry=2015-11-11 18:06:38 +0800 error_class="Elasticsearch::Transport::Transport::Error" error="Cannot get new connection from pool." plugin_id="object:124678c"

  2015-11-11 18:06:37 +0800 [warn]: /home/work/app/td-agent/embedded/lib/ruby/gems/2.1.0/gems/elasticsearch-transport-1.0.7/lib/elasticsearch/transport/transport/base.rb:179:in `perform_request'

  2015-11-11 18:06:37 +0800 [warn]: /home/work/app/td-agent/embedded/lib/ruby/gems/2.1.0/gems/elasticsearch-transport-1.0.7/lib/elasticsearch/transport/transport/http/faraday.rb:20:in `perform_request'

  2015-11-11 18:06:37 +0800 [warn]: /home/work/app/td-agent/embedded/lib/ruby/gems/2.1.0/gems/elasticsearch-transport-1.0.7/lib/elasticsearch/transport/client.rb:115:in `perform_request'

  2015-11-11 18:06:37 +0800 [warn]: /home/work/app/td-agent/embedded/lib/ruby/gems/2.1.0/gems/elasticsearch-api-1.0.7/lib/elasticsearch/api/actions/bulk.rb:80:in `bulk'

  2015-11-11 18:06:37 +0800 [warn]: /home/work/app/td-agent/etc/plugin/out_elasticsearch.rb:168:in `send'

  2015-11-11 18:06:37 +0800 [warn]: /home/work/app/td-agent/etc/plugin/out_elasticsearch.rb:161:in `write'

  2015-11-11 18:06:37 +0800 [warn]: /home/work/app/td-agent/embedded/lib/ruby/gems/2.1.0/gems/fluentd-0.12.12/lib/fluent/buffer.rb:325:in `write_chunk'

  2015-11-11 18:06:37 +0800 [warn]: /home/work/app/td-agent/embedded/lib/ruby/gems/2.1.0/gems/fluentd-0.12.12/lib/fluent/buffer.rb:304:in `pop'

  2015-11-11 18:06:37 +0800 [warn]: /home/work/app/td-agent/embedded/lib/ruby/gems/2.1.0/gems/fluentd-0.12.12/lib/fluent/output.rb:321:in `try_flush'

  2015-11-11 18:06:37 +0800 [warn]: /home/work/app/td-agent/embedded/lib/ruby/gems/2.1.0/gems/fluentd-0.12.12/lib/fluent/output.rb:140:in `run'

2015-11-11 18:06:38 +0800 [warn]: temporarily failed to flush the buffer. next_retry=2015-11-11 18:06:40 +0800 error_class="Elasticsearch::Transport::Transport::Error" error="Cannot get new connection from pool." plugin_id="object:124678c"

  2015-11-11 18:06:38 +0800 [warn]: suppressed same stacktrace

2015-11-11 18:06:40 +0800 [warn]: temporarily failed to flush the buffer. next_retry=2015-11-11 18:06:44 +0800 error_class="Elasticsearch::Transport::Transport::Error" error="Cannot get new connection from pool." plugin_id="object:124678c"

  2015-11-11 18:06:40 +0800 [warn]: suppressed same stacktrace

2015-11-11 18:06:44 +0800 [warn]: temporarily failed to flush the buffer. next_retry=2015-11-11 18:06:52 +0800 error_class="Elasticsearch::Transport::Transport::Error" error="Cannot get new connection from pool." plugin_id="object:124678c"

  2015-11-11 18:06:44 +0800 [warn]: suppressed same stacktrace

2015-11-11 18:06:52 +0800 [warn]: temporarily failed to flush the buffer. next_retry=2015-11-11 18:07:06 +0800 error_class="Elasticsearch::Transport::Transport::Error" error="Cannot get new connection from pool." plugin_id="object:124678c"

  2015-11-11 18:06:52 +0800 [warn]: suppressed same stacktrace

2015-11-11 18:07:06 +0800 [warn]: temporarily failed to flush the buffer. next_retry=2015-11-11 18:07:37 +0800 error_class="Elasticsearch::Transport::Transport::Error" error="Cannot get new connection from pool." plugin_id="object:124678c"

#################################################

My configuration is as follows:

#################################################

  type elasticsearch

  host 10.0.0.52

  port 9200

  path /

  logstash_format true

  utc_index false

  flush_interval 3s

  include_tag_key true

  tag_key tag

  buffer_type memory

  buffer_chunk_limit 256m

  buffer_queue_limit 128

  disable_retry_limit false

  retry_limit 17

  retry_wait 1s

  num_threads 5

#################################################

Help me see what is the cause?