Thread #<Thread:0x007f2c7f9b6060> status=run priority=0
      /opt/td-agent/embedded/lib/ruby/gems/2.4.0/gems/sigdump-0.2.4/lib/sigdump.rb:52:in `backtrace'
      /opt/td-agent/embedded/lib/ruby/gems/2.4.0/gems/sigdump-0.2.4/lib/sigdump.rb:52:in `dump_backtrace'
      /opt/td-agent/embedded/lib/ruby/gems/2.4.0/gems/sigdump-0.2.4/lib/sigdump.rb:34:in `block in dump_all_thread_backtrace'
      /opt/td-agent/embedded/lib/ruby/gems/2.4.0/gems/sigdump-0.2.4/lib/sigdump.rb:33:in `each'
      /opt/td-agent/embedded/lib/ruby/gems/2.4.0/gems/sigdump-0.2.4/lib/sigdump.rb:33:in `dump_all_thread_backtrace'
      /opt/td-agent/embedded/lib/ruby/gems/2.4.0/gems/sigdump-0.2.4/lib/sigdump.rb:16:in `block in dump'
      /opt/td-agent/embedded/lib/ruby/gems/2.4.0/gems/sigdump-0.2.4/lib/sigdump.rb:136:in `open'
      /opt/td-agent/embedded/lib/ruby/gems/2.4.0/gems/sigdump-0.2.4/lib/sigdump.rb:136:in `_open_dump_path'
      /opt/td-agent/embedded/lib/ruby/gems/2.4.0/gems/sigdump-0.2.4/lib/sigdump.rb:14:in `dump'
      /opt/td-agent/embedded/lib/ruby/gems/2.4.0/gems/sigdump-0.2.4/lib/sigdump.rb:7:in `block in setup'
      /opt/td-agent/embedded/lib/ruby/gems/2.4.0/gems/fluentd-0.14.16/lib/fluent/engine.rb:224:in `sleep'
      /opt/td-agent/embedded/lib/ruby/gems/2.4.0/gems/fluentd-0.14.16/lib/fluent/engine.rb:224:in `run'
      /opt/td-agent/embedded/lib/ruby/gems/2.4.0/gems/fluentd-0.14.16/lib/fluent/supervisor.rb:737:in `run_engine'
      /opt/td-agent/embedded/lib/ruby/gems/2.4.0/gems/fluentd-0.14.16/lib/fluent/supervisor.rb:503:in `block in run_worker'
      /opt/td-agent/embedded/lib/ruby/gems/2.4.0/gems/fluentd-0.14.16/lib/fluent/supervisor.rb:661:in `main_process'
      /opt/td-agent/embedded/lib/ruby/gems/2.4.0/gems/fluentd-0.14.16/lib/fluent/supervisor.rb:498:in `run_worker'
      /opt/td-agent/embedded/lib/ruby/gems/2.4.0/gems/fluentd-0.14.16/lib/fluent/command/fluentd.rb:316:in `<top (required)>'
      /opt/td-agent/embedded/lib/ruby/site_ruby/2.4.0/rubygems/core_ext/kernel_require.rb:55:in `require'
      /opt/td-agent/embedded/lib/ruby/site_ruby/2.4.0/rubygems/core_ext/kernel_require.rb:55:in `require'
      /opt/td-agent/embedded/lib/ruby/gems/2.4.0/gems/fluentd-0.14.16/bin/fluentd:5:in `<top (required)>'
      /opt/td-agent/embedded/bin/fluentd:22:in `load'
      /opt/td-agent/embedded/bin/fluentd:22:in `<top (required)>'
      /usr/sbin/td-agent:7:in `load'
      /usr/sbin/td-agent:7:in `<main>'
  Thread #<Thread:0x007f2c77db3378> status=sleep priority=0
      /opt/td-agent/embedded/lib/ruby/gems/2.4.0/gems/fluentd-0.14.16/lib/fluent/plugin/output.rb:1284:in `sleep'
      /opt/td-agent/embedded/lib/ruby/gems/2.4.0/gems/fluentd-0.14.16/lib/fluent/plugin/output.rb:1284:in `flush_thread_run'
      /opt/td-agent/embedded/lib/ruby/gems/2.4.0/gems/fluentd-0.14.16/lib/fluent/plugin/output.rb:420:in `block (2 levels) in start'
      /opt/td-agent/embedded/lib/ruby/gems/2.4.0/gems/fluentd-0.14.16/lib/fluent/plugin_helper/thread.rb:78:in `block in thread_create'
  Thread #<Thread:0x007f2c77db2fb8> status=sleep priority=0
      /opt/td-agent/embedded/lib/ruby/gems/2.4.0/gems/fluentd-0.14.16/lib/fluent/plugin/output.rb:1284:in `sleep'
      /opt/td-agent/embedded/lib/ruby/gems/2.4.0/gems/fluentd-0.14.16/lib/fluent/plugin/output.rb:1284:in `flush_thread_run'
      /opt/td-agent/embedded/lib/ruby/gems/2.4.0/gems/fluentd-0.14.16/lib/fluent/plugin/output.rb:420:in `block (2 levels) in start'
      /opt/td-agent/embedded/lib/ruby/gems/2.4.0/gems/fluentd-0.14.16/lib/fluent/plugin_helper/thread.rb:78:in `block in thread_create'
  Thread #<Thread:0x007f2c77db2bd0> status=sleep priority=0
      /opt/td-agent/embedded/lib/ruby/gems/2.4.0/gems/fluentd-0.14.16/lib/fluent/plugin/output.rb:1241:in `sleep'
      /opt/td-agent/embedded/lib/ruby/gems/2.4.0/gems/fluentd-0.14.16/lib/fluent/plugin/output.rb:1241:in `enqueue_thread_run'
      /opt/td-agent/embedded/lib/ruby/gems/2.4.0/gems/fluentd-0.14.16/lib/fluent/plugin_helper/thread.rb:78:in `block in thread_create'
  Thread #<Thread:0x007f2c77db1370> status=sleep priority=0
      /opt/td-agent/embedded/lib/ruby/gems/2.4.0/gems/fluentd-0.14.16/lib/fluent/plugin/output.rb:1284:in `sleep'
      /opt/td-agent/embedded/lib/ruby/gems/2.4.0/gems/fluentd-0.14.16/lib/fluent/plugin/output.rb:1284:in `flush_thread_run'
      /opt/td-agent/embedded/lib/ruby/gems/2.4.0/gems/fluentd-0.14.16/lib/fluent/plugin/output.rb:420:in `block (2 levels) in start'
      /opt/td-agent/embedded/lib/ruby/gems/2.4.0/gems/fluentd-0.14.16/lib/fluent/plugin_helper/thread.rb:78:in `block in thread_create'
  Thread #<Thread:0x007f2c77db0f88> status=sleep priority=0
      /opt/td-agent/embedded/lib/ruby/gems/2.4.0/gems/fluentd-0.14.16/lib/fluent/plugin/output.rb:1284:in `sleep'
      /opt/td-agent/embedded/lib/ruby/gems/2.4.0/gems/fluentd-0.14.16/lib/fluent/plugin/output.rb:1284:in `flush_thread_run'
      /opt/td-agent/embedded/lib/ruby/gems/2.4.0/gems/fluentd-0.14.16/lib/fluent/plugin/output.rb:420:in `block (2 levels) in start'
      /opt/td-agent/embedded/lib/ruby/gems/2.4.0/gems/fluentd-0.14.16/lib/fluent/plugin_helper/thread.rb:78:in `block in thread_create'
  Thread #<Thread:0x007f2c77db0c90> status=sleep priority=0
      /opt/td-agent/embedded/lib/ruby/gems/2.4.0/gems/fluentd-0.14.16/lib/fluent/plugin/output.rb:1241:in `sleep'
      /opt/td-agent/embedded/lib/ruby/gems/2.4.0/gems/fluentd-0.14.16/lib/fluent/plugin/output.rb:1241:in `enqueue_thread_run'
      /opt/td-agent/embedded/lib/ruby/gems/2.4.0/gems/fluentd-0.14.16/lib/fluent/plugin_helper/thread.rb:78:in `block in thread_create'
  Thread #<Thread:0x007f2c77daad68> status=sleep priority=0
      /opt/td-agent/embedded/lib/ruby/2.4.0/monitor.rb:187:in `lock'
      /opt/td-agent/embedded/lib/ruby/2.4.0/monitor.rb:187:in `mon_enter'
      /opt/td-agent/embedded/lib/ruby/2.4.0/monitor.rb:212:in `mon_synchronize'
      /opt/td-agent/embedded/lib/ruby/gems/2.4.0/gems/fluentd-0.14.16/lib/fluent/plugin/buffer.rb:369:in `dequeue_chunk'
      /opt/td-agent/embedded/lib/ruby/gems/2.4.0/gems/fluentd-0.14.16/lib/fluent/plugin/output.rb:1007:in `try_flush'
      /opt/td-agent/embedded/lib/ruby/gems/2.4.0/gems/fluentd-0.14.16/lib/fluent/plugin/output.rb:1268:in `flush_thread_run'
      /opt/td-agent/embedded/lib/ruby/gems/2.4.0/gems/fluentd-0.14.16/lib/fluent/plugin/output.rb:420:in `block (2 levels) in start'
      /opt/td-agent/embedded/lib/ruby/gems/2.4.0/gems/fluentd-0.14.16/lib/fluent/plugin_helper/thread.rb:78:in `block in thread_create'
  Thread #<Thread:0x007f2c77daaa70> status=sleep priority=0
      /opt/td-agent/embedded/lib/ruby/2.4.0/monitor.rb:187:in `lock'
      /opt/td-agent/embedded/lib/ruby/2.4.0/monitor.rb:187:in `mon_enter'
      /opt/td-agent/embedded/lib/ruby/2.4.0/monitor.rb:212:in `mon_synchronize'
      /opt/td-agent/embedded/lib/ruby/gems/2.4.0/gems/fluentd-0.14.16/lib/fluent/plugin/buffer.rb:369:in `dequeue_chunk'
      /opt/td-agent/embedded/lib/ruby/gems/2.4.0/gems/fluentd-0.14.16/lib/fluent/plugin/output.rb:1007:in `try_flush'
      /opt/td-agent/embedded/lib/ruby/gems/2.4.0/gems/fluentd-0.14.16/lib/fluent/plugin/output.rb:1268:in `flush_thread_run'
      /opt/td-agent/embedded/lib/ruby/gems/2.4.0/gems/fluentd-0.14.16/lib/fluent/plugin/output.rb:420:in `block (2 levels) in start'
      /opt/td-agent/embedded/lib/ruby/gems/2.4.0/gems/fluentd-0.14.16/lib/fluent/plugin_helper/thread.rb:78:in `block in thread_create'
  Thread #<Thread:0x007f2c77daa728> status=sleep priority=0
      /opt/td-agent/embedded/lib/ruby/2.4.0/monitor.rb:187:in `lock'
      /opt/td-agent/embedded/lib/ruby/2.4.0/monitor.rb:187:in `mon_enter'
      /opt/td-agent/embedded/lib/ruby/2.4.0/monitor.rb:212:in `mon_synchronize'
      /opt/td-agent/embedded/lib/ruby/gems/2.4.0/gems/fluentd-0.14.16/lib/fluent/plugin/buffer.rb:320:in `block in enqueue_chunk'
      /opt/td-agent/embedded/lib/ruby/2.4.0/monitor.rb:214:in `mon_synchronize'
      /opt/td-agent/embedded/lib/ruby/gems/2.4.0/gems/fluentd-0.14.16/lib/fluent/plugin/buffer.rb:316:in `enqueue_chunk'
      /opt/td-agent/embedded/lib/ruby/gems/2.4.0/gems/fluentd-0.14.16/lib/fluent/plugin/buffer.rb:356:in `block (2 levels) in enqueue_all'
      /opt/td-agent/embedded/lib/ruby/gems/2.4.0/gems/fluentd-0.14.16/lib/fluent/plugin/buffer.rb:353:in `each'
      /opt/td-agent/embedded/lib/ruby/gems/2.4.0/gems/fluentd-0.14.16/lib/fluent/plugin/buffer.rb:353:in `block in enqueue_all'
      /opt/td-agent/embedded/lib/ruby/2.4.0/monitor.rb:214:in `mon_synchronize'
      /opt/td-agent/embedded/lib/ruby/gems/2.4.0/gems/fluentd-0.14.16/lib/fluent/plugin/buffer.rb:351:in `enqueue_all'
      /opt/td-agent/embedded/lib/ruby/gems/2.4.0/gems/fluentd-0.14.16/lib/fluent/plugin/output.rb:1224:in `enqueue_thread_run'
      /opt/td-agent/embedded/lib/ruby/gems/2.4.0/gems/fluentd-0.14.16/lib/fluent/plugin_helper/thread.rb:78:in `block in thread_create'
  Thread #<Thread:0x007f2c77da8d10> status=sleep priority=0
      /opt/td-agent/embedded/lib/ruby/gems/2.4.0/gems/fluentd-0.14.16/lib/fluent/plugin/output.rb:1284:in `sleep'
      /opt/td-agent/embedded/lib/ruby/gems/2.4.0/gems/fluentd-0.14.16/lib/fluent/plugin/output.rb:1284:in `flush_thread_run'
      /opt/td-agent/embedded/lib/ruby/gems/2.4.0/gems/fluentd-0.14.16/lib/fluent/plugin/output.rb:420:in `block (2 levels) in start'
      /opt/td-agent/embedded/lib/ruby/gems/2.4.0/gems/fluentd-0.14.16/lib/fluent/plugin_helper/thread.rb:78:in `block in thread_create'
  Thread #<Thread:0x007f2c77da8888> status=sleep priority=0
      /opt/td-agent/embedded/lib/ruby/gems/2.4.0/gems/fluentd-0.14.16/lib/fluent/plugin/output.rb:1241:in `sleep'
      /opt/td-agent/embedded/lib/ruby/gems/2.4.0/gems/fluentd-0.14.16/lib/fluent/plugin/output.rb:1241:in `enqueue_thread_run'
      /opt/td-agent/embedded/lib/ruby/gems/2.4.0/gems/fluentd-0.14.16/lib/fluent/plugin_helper/thread.rb:78:in `block in thread_create'
  Thread #<Thread:0x007f2c77da8400> status=sleep priority=0
      /opt/td-agent/embedded/lib/ruby/gems/2.4.0/gems/cool.io-1.5.0/lib/cool.io/loop.rb:88:in `run_once'
      /opt/td-agent/embedded/lib/ruby/gems/2.4.0/gems/cool.io-1.5.0/lib/cool.io/loop.rb:88:in `run'
      /opt/td-agent/embedded/lib/ruby/gems/2.4.0/gems/fluentd-0.14.16/lib/fluent/plugin_helper/event_loop.rb:84:in `block in start'
      /opt/td-agent/embedded/lib/ruby/gems/2.4.0/gems/fluentd-0.14.16/lib/fluent/plugin_helper/thread.rb:78:in `block in thread_create'
  Thread #<Thread:0x007f2c77d95f58> status=sleep priority=0
      /opt/td-agent/embedded/lib/ruby/2.4.0/monitor.rb:187:in `lock'
      /opt/td-agent/embedded/lib/ruby/2.4.0/monitor.rb:187:in `mon_enter'
      /opt/td-agent/embedded/lib/ruby/2.4.0/monitor.rb:212:in `mon_synchronize'
      /opt/td-agent/embedded/lib/ruby/gems/2.4.0/gems/fluentd-0.14.16/lib/fluent/plugin/buffer.rb:457:in `write_once'
      /opt/td-agent/embedded/lib/ruby/gems/2.4.0/gems/fluentd-0.14.16/lib/fluent/plugin/buffer.rb:207:in `block in write'
      /opt/td-agent/embedded/lib/ruby/gems/2.4.0/gems/fluentd-0.14.16/lib/fluent/plugin/buffer.rb:206:in `each'
      /opt/td-agent/embedded/lib/ruby/gems/2.4.0/gems/fluentd-0.14.16/lib/fluent/plugin/buffer.rb:206:in `write'
      /opt/td-agent/embedded/lib/ruby/gems/2.4.0/gems/fluentd-0.14.16/lib/fluent/plugin/output.rb:879:in `block in handle_stream_with_custom_format'
      /opt/td-agent/embedded/lib/ruby/gems/2.4.0/gems/fluentd-0.14.16/lib/fluent/plugin/output.rb:805:in `write_guard'
      /opt/td-agent/embedded/lib/ruby/gems/2.4.0/gems/fluentd-0.14.16/lib/fluent/plugin/output.rb:878:in `handle_stream_with_custom_format'
      /opt/td-agent/embedded/lib/ruby/gems/2.4.0/gems/fluentd-0.14.16/lib/fluent/plugin/output.rb:797:in `execute_chunking'
      /opt/td-agent/embedded/lib/ruby/gems/2.4.0/gems/fluentd-0.14.16/lib/fluent/plugin/output.rb:732:in `emit_buffered'
      /opt/td-agent/embedded/lib/ruby/gems/2.4.0/gems/fluentd-0.14.16/lib/fluent/event_router.rb:96:in `emit_stream'
      /opt/td-agent/embedded/lib/ruby/gems/2.4.0/gems/fluentd-0.14.16/lib/fluent/plugin/in_forward.rb:300:in `on_message'
      /opt/td-agent/embedded/lib/ruby/gems/2.4.0/gems/fluentd-0.14.16/lib/fluent/plugin/in_forward.rb:211:in `block in handle_connection'
      /opt/td-agent/embedded/lib/ruby/gems/2.4.0/gems/fluentd-0.14.16/lib/fluent/plugin/in_forward.rb:248:in `block (3 levels) in read_messages'
      /opt/td-agent/embedded/lib/ruby/gems/2.4.0/gems/fluentd-0.14.16/lib/fluent/plugin/in_forward.rb:247:in `feed_each'
      /opt/td-agent/embedded/lib/ruby/gems/2.4.0/gems/fluentd-0.14.16/lib/fluent/plugin/in_forward.rb:247:in `block (2 levels) in read_messages'
      /opt/td-agent/embedded/lib/ruby/gems/2.4.0/gems/fluentd-0.14.16/lib/fluent/plugin/in_forward.rb:256:in `block in read_messages'
      /opt/td-agent/embedded/lib/ruby/gems/2.4.0/gems/fluentd-0.14.16/lib/fluent/plugin_helper/server.rb:576:in `on_read_without_connection'
      /opt/td-agent/embedded/lib/ruby/gems/2.4.0/gems/cool.io-1.5.0/lib/cool.io/io.rb:123:in `on_readable'
      /opt/td-agent/embedded/lib/ruby/gems/2.4.0/gems/cool.io-1.5.0/lib/cool.io/io.rb:186:in `on_readable'
      /opt/td-agent/embedded/lib/ruby/gems/2.4.0/gems/cool.io-1.5.0/lib/cool.io/loop.rb:88:in `run_once'
      /opt/td-agent/embedded/lib/ruby/gems/2.4.0/gems/cool.io-1.5.0/lib/cool.io/loop.rb:88:in `run'
      /opt/td-agent/embedded/lib/ruby/gems/2.4.0/gems/fluentd-0.14.16/lib/fluent/plugin_helper/event_loop.rb:84:in `block in start'
      /opt/td-agent/embedded/lib/ruby/gems/2.4.0/gems/fluentd-0.14.16/lib/fluent/plugin_helper/thread.rb:78:in `block in thread_create'
  Thread #<Thread:0x007f2c78975878> status=sleep priority=0
      /opt/td-agent/embedded/lib/ruby/gems/2.4.0/gems/cool.io-1.5.0/lib/cool.io/loop.rb:88:in `run_once'
      /opt/td-agent/embedded/lib/ruby/gems/2.4.0/gems/cool.io-1.5.0/lib/cool.io/loop.rb:88:in `run'
      /opt/td-agent/embedded/lib/ruby/gems/2.4.0/gems/fluentd-0.14.16/lib/fluent/plugin_helper/event_loop.rb:84:in `block in start'
      /opt/td-agent/embedded/lib/ruby/gems/2.4.0/gems/fluentd-0.14.16/lib/fluent/plugin_helper/thread.rb:78:in `block in thread_create'
  Thread #<Thread:0x007f2c789667d8> status=sleep priority=0
      /opt/td-agent/embedded/lib/ruby/2.4.0/webrick/server.rb:171:in `select'
      /opt/td-agent/embedded/lib/ruby/2.4.0/webrick/server.rb:171:in `block in start'
      /opt/td-agent/embedded/lib/ruby/2.4.0/webrick/server.rb:33:in `start'
      /opt/td-agent/embedded/lib/ruby/2.4.0/webrick/server.rb:158:in `start'
      /opt/td-agent/embedded/lib/ruby/gems/2.4.0/gems/fluentd-0.14.16/lib/fluent/plugin/in_monitor_agent.rb:253:in `block in start'
      /opt/td-agent/embedded/lib/ruby/gems/2.4.0/gems/fluentd-0.14.16/lib/fluent/plugin_helper/thread.rb:78:in `block in thread_create'
  Thread #<Thread:0x007f2c78965ab8> status=sleep priority=0
      /opt/td-agent/embedded/lib/ruby/gems/2.4.0/gems/fluentd-0.14.16/lib/fluent/engine.rb:192:in `sleep'
      /opt/td-agent/embedded/lib/ruby/gems/2.4.0/gems/fluentd-0.14.16/lib/fluent/engine.rb:192:in `log_event_loop'
  GC stat:
      count: 1757
      heap_allocated_pages: 1433
      heap_sorted_length: 1769
      heap_allocatable_pages: 0
      heap_available_slots: 584081
      heap_live_slots: 579855
      heap_free_slots: 4226
      heap_final_slots: 0
      heap_marked_slots: 391629
      heap_eden_pages: 1433
      heap_tomb_pages: 0
      total_allocated_pages: 7795
      total_freed_pages: 6362
      total_allocated_objects: 441204816
      total_freed_objects: 440624961
      malloc_increase_bytes: 487808
      malloc_increase_bytes_limit: 26868081
      minor_gc_count: 1500
      major_gc_count: 257
      remembered_wb_unprotected_objects: 708
      remembered_wb_unprotected_objects_limit: 1416
      old_objects: 389273
      old_objects_limit: 403190
      oldmalloc_increase_bytes: 7924048
      oldmalloc_increase_bytes_limit: 34505939
  Built-in objects:
   584,081: TOTAL
   380,167: T_STRING
    61,586: T_HASH
    58,831: T_ARRAY
    30,637: T_DATA
    25,235: T_IMEMO
     7,498: T_RATIONAL
     7,122: T_BIGNUM
     4,150: FREE
     2,458: T_CLASS
     1,887: T_OBJECT
     1,494: T_FILE
     1,392: T_NODE
       576: T_REGEXP
       296: T_ICLASS
       237: T_STRUCT
       236: T_MODULE
       200: T_MATCH
        69: T_SYMBOL
         9: T_FLOAT
         1: T_COMPLEX
  All objects:
   355,795: String
    57,494: Hash
    34,518: Array
    18,878: Time
     5,039: Rational
     4,777: Integer
     1,489: Proc
     1,403: Class
       956: Fluent::PluginHelper::Socket::WrappedSocket::TCP
       576: Regexp
       533: Gem::Requirement
       371: Gem::Dependency
       236: Module
       218: TZInfo::TimezoneTransitionDefinition
       178: Gem::Version
       161: MatchData
       101: Encoding
        96: Range
        91: Thread::Mutex
        87: Fluent::Plugin::Buffer::Metadata
        78: Fluent::Config::ConfigureProxy
        73: Gem::Specification
        73: Gem::StubSpecification::StubLine
        73: Gem::StubSpecification
        69: Symbol
        59: MessagePack::Buffer
        56: MessagePack::Packer
        51: File
        39: Fluent::Config::Element
        32: Fluent::MultiEventStream
        31: Enumerator
        28: Fluent::Config::Section
        23: Fluent::Plugin::Buffer::FileChunk
        19: Thread::Backtrace
        18: Fluent::EventTime
        17: Method
        17: Thread
        17: OptionParser::Switch::RequiredArgument
        15: Fluent::Plugin::Base::State
        13: OptionParser::Switch::NoArgument
         9: Float
         8: Fluent::GlobMatchPattern
         8: Fluent::Registry
         7: Fluent::Plugin::Output::FlushThreadState
         6: Coolio::IO::Watcher
         6: Fluent::EventRouter::Rule
         6: Monitor
         6: OptionParser::OptionMap
         5: IO
         5: Fluent::Log
         5: Logger::Formatter
         5: ServerEngine::DaemonLogger
         5: TZInfo::TimezoneOffset
         4: IO::Buffer
         4: Fluent::Plugin::FileBuffer
         4: Fluent::PluginLogger
         4: Object
         3: MessagePack::Unpacker
         3: Fluent::PluginHelper::EventLoop::DefaultWatcher
         3: Coolio::Loop
         3: Fluent::Plugin::FileOutput
         3: Fluent::Plugin::SyslogGWLFormatter
         3: IRB::Notifier::LeveledNotifier
         3: JSON::Ext::Generator::State
         3: OptionParser::List
         2: Fluent::PluginHelper::Server::TCPCallbackSocket
         2: Fluent::PluginHelper::Server::EventHandler::TCPServer
         2: TCPSocket
         2: Fluent::EventRouter::Pipeline::FilterOptimizer
         2: Fluent::EventRouter::Pipeline
         2: ThreadGroup
         2: Fluent::OrMatchPattern
         2: MessagePack::Factory
         2: OpenSSL::PKey::DH
         2: ThreadSafe::Cache
         2: TCPServer
         2: Fluent::PluginHelper::Timer::TimerWatcher
         2: TZInfo::TimeOrDateTime
         2: OptionParser::Switch::PlacedArgument
         2: OptionParser::Switch::OptionalArgument
         2: UnboundMethod
         2: Fluent::PluginHelper::Server::ServerInfo
         1: Fluent::MessagePackEventStream
         1: EOFError
         1: Fluent::Plugin::ForwardOutput::Node
         1: Fluent::Plugin::ForwardOutput::FailureDetector
         1: Fluent::EventRouter::MatchCache
         1: Fluent::EventRouter
         1: Fluent::NoMatchMatch
         1: Fluent::RootAgent
         1: Fluent::SystemConfig
         1: Fluent::Plugin::ForwardOutput
         1: TZInfo::RubyDataSource
         1: Fluent::Plugin::RecordTransformerFilter::PlaceholderExpander
         1: Fluent::Plugin::RecordTransformerFilter
         1: Fluent::EngineClass
         1: OpenSSL::X509::Store
         1: Fluent::Plugin::MonitorAgentInput
         1: Resolv::DNS::Config
         1: Resolv::DNS
         1: Resolv::Hosts
         1: Resolv
         1: ArgumentError
         1: Fluent::Plugin::ForwardInput
         1: TZInfo::DataTimezone
         1: TZInfo::TransitionDataTimezoneInfo
         1: Fluent::Plugin::NullOutput
         1: Fluent::Compat::NullOutputChain
         1: Coolio::TCPServer
         1: Set
         1: WEBrick::HTTPVersion
         1: Fluent::Supervisor::LoggerInitializer
         1: Fluent::Supervisor
         1: IRB::Notifier::NoMsgNotifier
         1: IRB::StdioOutputMethod
         1: IRB::Notifier::CompositeNotifier
         1: OptionParser
         1: WEBrick::HTTPServer::MountTable
         1: URI::RFC2396_Parser
         1: URI::RFC3986_Parser
         1: Thread::SizedQueue
         1: WEBrick::HTTPServer
         1: WEBrick::Log
         1: Fluent::PluginHelper::Server::EventHandler::UDPServer
         1: UDPSocket
         1: Gem::PathSupport
         1: Gem::Platform
         1: #<Class:0x007f2c78ed0570>
         1: #<Class:0x007f2c78f0d5b0>
         1: fatal
         1: Data
         1: OptionParser::CompletingHash
         1: Complex
         1: IOError
         1: Binding
         1: RubyVM
         1: NoMemoryError
         1: SystemStackError
         1: Random
         1: ARGF.class
  String 54,823,780 bytes
   Array 1 elements
    Hash 2 pairs