logstash output kafka ip 设置的坑

原设置

output {
  kafka {
    acks => ""
    enable_metric => false
    codec => "json"
    topic_id => "topic_test"
    bootstrap_servers =>"kafka:9092"
    batch_size => 2
  }
  stdout {
    codec => "json"
  }
}

异常

ERROR logstash.pipeline - Error registering plugin {:plugin=>"#<LogStash::OutputDelegator:0x7f6968f0 @namespaced_metric=#<LogStash::Instrument::NamespacedMetric:0x6a481298 @metric=#<LogStash::Instrument::Metric:0x373adc76 @collector=#<LogStash::Instrument::Collector:0x5c413763 @agent=nil, @metric_store=#<LogStash::Instrument::MetricStore:0x68dbfaf3 @store=#<Concurrent::Map:0x00000000061f98 entries=2 default_proc=nil>, @structured_lookup_mutex=#<Mutex:0x422de9a2>, @fast_lookup=#<Concurrent::Map:0x00000000061f9c entries=53 default_proc=nil>>>>, @namespace_name=[:stats, :pipelines, :main, :plugins, :outputs, :\"ea6e3d1fb3cb9d03054be3c38cb045c1fb3aae21-4\"]>, @metric=#<LogStash::Instrument::NamespacedMetric:0x763a85c3 @metric=#<LogStash::Instrument::Metric:0x373adc76 @collector=#<LogStash::Instrument::Collector:0x5c413763 @agent=nil, @metric_store=#<LogStash::Instrument::MetricStore:0x68dbfaf3 @store=#<Concurrent::Map:0x00000000061f98 entries=2 default_proc=nil>, @structured_lookup_mutex=#<Mutex:0x422de9a2>, @fast_lookup=#<Concurrent::Map:0x00000000061f9c entries=53 default_proc=nil>>>>, @namespace_name=[:stats, :pipelines, :main, :plugins, :outputs]>, @logger=#<LogStash::Logging::Logger:0x6ccc74ee @logger=#<Java::OrgApacheLoggingLog4jCore::Logger:0x143e31e1>>, @strategy=#<LogStash::OutputDelegatorStrategies::Shared:0x4741e2d6 @output=<LogStash::Outputs::Kafka acks=>\"0\", codec=><LogStash::Codecs::JSON id=>\"json_f412b478-1559-45fd-9d73-7b500ed05f4a\", enable_metric=>true, charset=>\"UTF-8\">, topic_id=>\"qingbo_news\", bootstrap_servers=>\"kafka_l:9092\", batch_size=>2, id=>\"ea6e3d1fb3cb9d03054be3c38cb045c1fb3aae21-4\", enable_metric=>true, workers=>1, block_on_buffer_full=>true, buffer_memory=>33554432, compression_type=>\"none\", key_serializer=>\"org.apache.kafka.common.serialization.StringSerializer\", linger_ms=>0, max_request_size=>1048576, metadata_fetch_timeout_ms=>60000, metadata_max_age_ms=>300000, receive_buffer_bytes=>32768, reconnect_backoff_ms=>10, retries=>0, retry_backoff_ms=>100, send_buffer_bytes=>131072, ssl=>false, security_protocol=>\"PLAINTEXT\", sasl_mechanism=>\"GSSAPI\", timeout_ms=>30000, value_serializer=>\"org.apache.kafka.common.serialization.StringSerializer\">>, @id=\"ea6e3d1fb3cb9d03054be3c38cb045c1fb3aae21-4\", @metric_events=#<LogStash::Instrument::NamespacedMetric:0x9221af6 @metric=#<LogStash::Instrument::Metric:0x373adc76 @collector=#<LogStash::Instrument::Collector:0x5c413763 @agent=nil, @metric_store=#<LogStash::Instrument::MetricStore:0x68dbfaf3 @store=#<Concurrent::Map:0x00000000061f98 entries=2 default_proc=nil>, @structured_lookup_mutex=#<Mutex:0x422de9a2>, @fast_lookup=#<Concurrent::Map:0x00000000061f9c entries=53 default_proc=nil>>>>, @namespace_name=[:stats, :pipelines, :main, :plugins, :outputs, :\"ea6e3d1fb3cb9d03054be3c38cb045c1fb3aae21-4\", :events]>, @output_class=LogStash::Outputs::Kafka>", :error=>"Failed to construct kafka producer"}
06:49:57.474 [[main]-pipeline-manager] ERROR logstash.agent - Pipeline aborted due to error {:exception=>org.apache.kafka.common.KafkaException: Failed to construct kafka producer, :backtrace=>["org.apache.kafka.clients.producer.KafkaProducer.<init>(org/apache/kafka/clients/producer/KafkaProducer.java:335)", "org.apache.kafka.clients.producer.KafkaProducer.<init>(org/apache/kafka/clients/producer/KafkaProducer.java:188)", "java.lang.reflect.Constructor.newInstance(java/lang/reflect/Constructor.java:423)", "RUBY.create_producer(/usr/share/logstash/vendor/bundle/jruby/1.9/gems/logstash-output-kafka-5.1.7/lib/logstash/outputs/kafka.rb:242)", "RUBY.register(/usr/share/logstash/vendor/bundle/jruby/1.9/gems/logstash-output-kafka-5.1.7/lib/logstash/outputs/kafka.rb:178)", "RUBY.register(/usr/share/logstash/logstash-core/lib/logstash/output_delegator_strategies/shared.rb:9)", "RUBY.register(/usr/share/logstash/logstash-core/lib/logstash/output_delegator.rb:41)", "RUBY.register_plugin(/usr/share/logstash/logstash-core/lib/logstash/pipeline.rb:281)", "RUBY.register_plugins(/usr/share/logstash/logstash-core/lib/logstash/pipeline.rb:292)", "org.jruby.RubyArray.each(org/jruby/RubyArray.java:1613)", "RUBY.register_plugins(/usr/share/logstash/logstash-core/lib/logstash/pipeline.rb:292)", "RUBY.start_workers(/usr/share/logstash/logstash-core/lib/logstash/pipeline.rb:301)", "RUBY.run(/usr/share/logstash/logstash-core/lib/logstash/pipeline.rb:226)", "RUBY.start_pipeline(/usr/share/logstash/logstash-core/lib/logstash/agent.rb:398)", "java.lang.Thread.run(java/lang/Thread.java:748)"]}
06:49:57.611 [Api Webserver] INFO logstash.agent - Successfully started Logstash API endpoint {:port=>9600}

找不到任何相关信息

https://discuss.elastic.co/t/failed-to-construct-kafka-producer/76195

最相近的贴子时这个，但没有得到回复,问题过期也禁止回复

kafka 写在 /etc/hosts 里,网络是通的

bash-4.3# ping kafka
PING kafka (172.32.255.81): 56 data bytes
64 bytes from 172.32.255.81: seq=0 ttl=64 time=0.301 ms
64 bytes from 172.32.255.81: seq=1 ttl=64 time=0.093 ms

以前搞 hadoop 碰上过相反的问题，hadoop当时配的ip,失败报奇葩错误，配成host才正常。

可以换 host换 ip 试试 换成ip，便通过了

output {
 kafka {
　　acks => ""
　　enable_metric => false
　　codec => "json"
　　topic_id => "topic_test"
　　bootstrap_servers =>"172.32.255.81:9092"
　　batch_size => 2
 }
 stdout {
　　codec => "json"
 }
}