Issues with collectd 5.1.0

[backbohne]

Hi,

my inputworker cores after some seconds/minutes when logstash reads UDP packets from collectd 5.1.0 via network from our external collectd server (via proxy forward).

This behavior will be disappear in case I use my local collectd agent (version 5.4.1) as proxy (forward to 127.0.0.1) as well and switch logstash listener to 127.0.0.1.

OK, collectd 5.1.0 is a bit outdated, but we can not upgrade without test all of our slightly older clients :-(

{:timestamp=>"2016-03-21T15:55:37.648000+0100", :message=>"Exception in inputworker", "exception"=>#<TypeError: NilClass can't be coerced into Fixnum>, "backtrace"=>["org/jruby/RubyFixnum.java:361:in `+'", "/opt/logstash-codec-collectd/lib/logstash/codecs/collectd.rb:395:in `decode'", "/opt/logstash/vendor/bundle/jruby/1.9/gems/logstash-input-udp-2.0.3/lib/logstash/inputs/udp.rb:96:in `inputworker'", "/opt/logstash/vendor/bundle/jruby/1.9/gems/logstash-input-udp-2.0.3/lib/logstash/inputs/udp.rb:73:in `udp_listener'"], :level=>:error}
{:timestamp=>"2016-03-21T15:57:25.669000+0100", :message=>"Exception in inputworker", "exception"=>#<NoMethodError: undefined method `<<' for nil:NilClass>, "backtrace"=>["/opt/logstash-codec-collectd/lib/logstash/codecs/collectd.rb:395:in `decode'", "/opt/logstash/vendor/bundle/jruby/1.9/gems/logstash-input-udp-2.0.3/lib/logstash/inputs/udp.rb:96:in `inputworker'", "/opt/logstash/vendor/bundle/jruby/1.9/gems/logstash-input-udp-2.0.3/lib/logstash/inputs/udp.rb:73:in `udp_listener'"], :level=>:error}

I'm using the lasted collectd codec from github with logstash 2.2.2-1.

Regards
Frank

[untergeek]

Thanks for the report. I'm not even sure exactly why it's failing, based on that message. Since you're reporting that it works with 5.4.1, It may be that the 5.1.0 typesdb file is the culprit. In other words, you're sending in 5.1.0 format, but the codec is expecting 5.4.x, and there may be a conflict. But when you proxy through 5.4.1, it works (because it's an updated typesdb file).

You can specify a 5.1.0 typesdb file and see if that changes anything for you.

[backbohne]

Sorry forgot to notice, using the original 5.1.0 typesdb from our collectd server (in both cases).

here is my logstash config input:

  udp {
    host => "127.0.0.1"
    port => 25826
    buffer_size => 1452
    codec => collectd { 
      typesdb => [
        "/opt/logstash/collectd/types.db"
      ]
    }
    type => "collectd"
  }