logstash配置out自定义模板到ES失败，大神们帮忙分析下什么原因吧

logstash配置out自定义模板到ES失败，大神们帮忙分析下什么原因吧。
[2021-08-20T17:21:03,890][ERROR][logstash.outputs.elasticsearch][main] Failed to install template. {:message=>"Got response code '503' contacting Elasticsearch at URL '192.168.200.223:9200/_template/logstash'", :class=>"LogStash::Outputs::ElasticSearch::HttpClient::Pool::BadResponseCodeError", :backtrace=>["/srv/program/logstash-7.10.0/vendor/bundle/jruby/2.5.0/gems/logstash-output-elasticsearch-10.7.0-java/lib/logstash/outputs/elasticsearch/http_client/manticore_adapter.rb:80:in `perform_request'", "/srv/program/logstash-7.10.0/vendor/bundle/jruby/2.5.0/gems/logstash-output-elasticsearch-10.7.0-java/lib/logstash/outputs/elasticsearch/http_client/pool.rb:332:in `perform_request_to_url'", "/srv/program/logstash-7.10.0/vendor/bundle/jruby/2.5.0/gems/logstash-output-elasticsearch-10.7.0-java/lib/logstash/outputs/elasticsearch/http_client/pool.rb:319:in `block in perform_request'", "/srv/program/logstash-7.10.0/vendor/bundle/jruby/2.5.0/gems/logstash-output-elasticsearch-10.7.0-java/lib/logstash/outputs/elasticsearch/http_client/pool.rb:414:in `with_connection'", "/srv/program/logstash-7.10.0/vendor/bundle/jruby/2.5.0/gems/logstash-output-elasticsearch-10.7.0-java/lib/logstash/outputs/elasticsearch/http_client/pool.rb:318:in `perform_request'", "/srv/program/logstash-7.10.0/vendor/bundle/jruby/2.5.0/gems/logstash-output-elasticsearch-10.7.0-java/lib/logstash/outputs/elasticsearch/http_client/pool.rb:326:in `block in Pool'", "/srv/program/logstash-7.10.0/vendor/bundle/jruby/2.5.0/gems/logstash-output-elasticsearch-10.7.0-java/lib/logstash/outputs/elasticsearch/http_client.rb:341:in `exists?'", "/srv/program/logstash-7.10.0/vendor/bundle/jruby/2.5.0/gems/logstash-output-elasticsearch-10.7.0-java/lib/logstash/outputs/elasticsearch/http_client.rb:346:in `template_exists?'", "/srv/program/logstash-7.10.0/vendor/bundle/jruby/2.5.0/gems/logstash-output-elasticsearch-10.7.0-java/lib/logstash/outputs/elasticsearch/http_client.rb:82:in `template_install'", "/srv/program/logstash-7.10.0/vendor/bundle/jruby/2.5.0/gems/logstash-output-elasticsearch-10.7.0-java/lib/logstash/outputs/elasticsearch/template_manager.rb:31:in `install'", "/srv/program/logstash-7.10.0/vendor/bundle/jruby/2.5.0/gems/logstash-output-elasticsearch-10.7.0-java/lib/logstash/outputs/elasticsearch/template_manager.rb:17:in `install_template'", "/srv/program/logstash-7.10.0/vendor/bundle/jruby/2.5.0/gems/logstash-output-elasticsearch-10.7.0-java/lib/logstash/outputs/elasticsearch/common.rb:218:in `install_template'", "/srv/program/logstash-7.10.0/vendor/bundle/jruby/2.5.0/gems/logstash-output-elasticsearch-10.7.0-java/lib/logstash/outputs/elasticsearch/common.rb:49:in `block in setup_after_successful_connection'"]}