Can you provide me with a .pcap format packet capture of the incoming trap (dropbox/s3,etc) ? That will help me to reproduce, if it comes to that.
Also, when I start logstash with snmptrap input, I see considerably more debug output, including the mentioned YAMLs loaded.
bin/logstash --debug -f snmptrap-input-test.cfg
...
config LogStash::Outputs::Stdout/@exclude_tags = [] {:level=>:debug, :file=>"logstash/config/mixin.rb", :line=>"111", :method=>"config_init"}
config LogStash::Outputs::Stdout/@workers = 1 {:level=>:debug, :file=>"logstash/config/mixin.rb", :line=>"111", :method=>"config_init"}
checking ~/logstash-1.5.4/vendor/bundle/jruby/1.9/gems/snmp-1.2.0/data/ruby/snmp/mibs/ for MIBs {:level=>:info, :file=>"logstash/inputs/snmptrap.rb", :line=>"40", :method=>"register"}
found MIBs: ACCOUNTING-CONTROL-MIB,ADSL-LINE-EXT-MIB,ADSL-LINE-MIB,ADSL-TC-MIB,ADSL2-LINE-MIB,ADSL2-LINE-TC-MIB,AGENTX-MIB,AGGREGATE-MIB,ALARM-MIB,APM-MIB,APPC-MIB,APPLETALK-MIB,APPLICATION-MIB,APPN-DLUR-MIB,APPN-MIB,APPN-TRAP-MIB,APS-MIB,ARC-MIB,ATM-ACCOUNTING-INFORMATION-MIB,ATM-MIB,ATM-TC-MIB,ATM2-MIB,BGP4-MIB,BLDG-HVAC-MIB,BRIDGE-MIB,CHARACTER-MIB,CIRCUIT-IF-MIB,CLNS-MIB,COFFEE-POT-MIB,COPS-CLIENT-MIB,DECNET-PHIV-MIB,DIAL-CONTROL-MIB,DIFFSERV-CONFIG-MIB,DIFFSERV-DSCP-TC,DIFFSERV-MIB,
...
If I run it without the --debug flag, I see output similar to yours.
Please show me the output of:
bin/logstash --version
bin/plugin list --verbose
(still not sure about why we see that Trap listener died - I will investigate that further).