/var/log/logstash.log
{:timestamp=>"2015-10-28T04:56:52.662000-0500", :message=>"You are using a deprecated config setting \"singles\" set in grok. Deprecated settings will continue to work, but are scheduled for removal from logstash in the future. This behavior is the default now, you don't need to set it. If you have any questions about this, please visit the #logstash channel on freenode irc.", :name=>"singles", :plugin=><LogStash::Filters::Grok match=>["message", "%{SYSLOGBASE} %{GREEDYDATA:_syslog_payload}"], singles=>"true", add_tag=>["postfix", "email", "mail01", "smtp"]>, :level=>:warn}
{:timestamp=>"2015-10-28T04:56:52.671000-0500", :message=>"You are using a deprecated config setting \"singles\" set in grok. Deprecated settings will continue to work, but are scheduled for removal from logstash in the future. This behavior is the default now, you don't need to set it. If you have any questions about this, please visit the #logstash channel on freenode irc.", :name=>"singles", :plugin=><LogStash::Filters::Grok singles=>"true", match=>["_syslog_payload", "%{BASE16NUM:queue_id}: %{GREEDYDATA:details}"]>, :level=>:warn}
{:timestamp=>"2015-10-28T04:57:00.730000-0500", :message=>"CircuitBreaker::rescuing exceptions", :name=>"Lumberjack input", :exception=>LogStash::SizedQueueTimeout::TimeoutError, :level=>:warn}
{:timestamp=>"2015-10-28T04:57:00.733000-0500", :message=>"Lumberjack input: The circuit breaker has detected a slowdown or stall in the pipeline, the input is closing the current connection and rejecting new connection until the pipeline recover.", :exception=>LogStash::CircuitBreaker::HalfOpenBreaker, :level=>:warn}
{:timestamp=>"2015-10-28T04:57:05.731000-0500", :message=>"CircuitBreaker::rescuing exceptions", :name=>"Lumberjack input", :exception=>LogStash::SizedQueueTimeout::TimeoutError, :level=>:warn}
{:timestamp=>"2015-10-28T04:57:05.733000-0500", :message=>"Lumberjack input: The circuit breaker has detected a slowdown or stall in the pipeline, the input is closing the current connection and rejecting new connection until the pipeline recover.", :exception=>LogStash::CircuitBreaker::HalfOpenBreaker, :level=>:warn}
{:timestamp=>"2015-10-28T04:57:10.733000-0500", :message=>"CircuitBreaker::rescuing exceptions", :name=>"Lumberjack input", :exception=>LogStash::SizedQueueTimeout::TimeoutError, :level=>:warn}
{:timestamp=>"2015-10-28T04:57:10.735000-0500", :message=>"Lumberjack input: The circuit breaker has detected a slowdown or stall in the pipeline, the input is closing the current connection and rejecting new connection until the pipeline recover.", :exception=>LogStash::CircuitBreaker::HalfOpenBreaker, :level=>:warn}
{:timestamp=>"2015-10-28T04:57:12.384000-0500", :message=>"CircuitBreaker::rescuing exceptions", :name=>"Lumberjack input", :exception=>LogStash::SizedQueueTimeout::TimeoutError, :level=>:warn}
{:timestamp=>"2015-10-28T04:57:12.387000-0500", :message=>"Lumberjack input: The circuit breaker has detected a slowdown or stall in the pipeline, the input is closing the current connection and rejecting new connection until the pipeline recover.", :exception=>LogStash::CircuitBreaker::HalfOpenBreaker, :level=>:warn}
{:timestamp=>"2015-10-28T04:57:15.821000-0500", :message=>"CircuitBreaker::rescuing exceptions", :name=>"Lumberjack input", :exception=>LogStash::SizedQueueTimeout::TimeoutError, :level=>:warn}
{:timestamp=>"2015-10-28T04:57:15.823000-0500", :message=>"Lumberjack input: The circuit breaker has detected a slowdown or stall in the pipeline, the input is closing the current connection and rejecting new connection until the pipeline recover.", :exception=>LogStash::CircuitBreaker::HalfOpenBreaker, :level=>:warn}
{:timestamp=>"2015-10-28T04:57:15.860000-0500", :message=>"Lumberjack input: the pipeline is blocked, temporary refusing new connection.", :level=>:warn}
{:timestamp=>"2015-10-28T04:57:15.911000-0500", :message=>"CircuitBreaker::Open", :name=>"Lumberjack input", :level=>:warn}
{:timestamp=>"2015-10-28T04:57:15.912000-0500", :message=>"Lumberjack input: The circuit breaker has detected a slowdown or stall in the pipeline, the input is closing the current connection and rejecting new connection until the pipeline recover.", :exception=>LogStash::CircuitBreaker::OpenBreaker, :level=>:warn}
{:timestamp=>"2015-10-28T04:57:16.361000-0500", :message=>"Lumberjack input: the pipeline is blocked, temporary refusing new connection.", :level=>:warn}
{:timestamp=>"2015-10-28T04:57:16.863000-0500", :message=>"Lumberjack input: the pipeline is blocked, temporary refusing new connection.", :level=>:warn}
{:timestamp=>"2015-10-28T04:57:17.364000-0500", :message=>"Lumberjack input: the pipeline is blocked, temporary refusing new connection.", :level=>:warn}