Logstash crashing with "exception"=>"undefined method `tr' for 0:Fixnum",

Elastic Stack Logstash
1

Logstash crashing while converting value to float. See below for config file and exception. Has anyone seen this error and is there a workaround.

version: logstash 5.6.9

conf file:

filter {
    if [type] == "metric" {
        mutate {
           convert => ["value", "float"]
        }
     }
}

2018-04-26T19:27:10,875][ERROR][logstash.pipeline ] Exception in pipelineworker, the pipeline stopped processing new events, please check your filter configuration and restart Logstash. {"exception"=>"undefined method tr' for 0:Fixnum", "backtrace"=>["/usr/share/logstash/vendor/bundle/jruby/1.9/gems/logstash-filter-mutate-3.3.1/lib/logstash/filters/mutate.rb:344:inconvert_float'", "org/jruby/RubyMethod.java:120:in call'", "/usr/share/logstash/vendor/bundle/jruby/1.9/gems/logstash-filter-mutate-3.3.1/lib/logstash/filters/mutate.rb:313:inconvert'", "org/jruby/RubyHash.java:1342:in each'", "/usr/share/logstash/vendor/bundle/jruby/1.9/gems/logstash-filter-mutate-3.3.1/lib/logstash/filters/mutate.rb:299:inconvert'", "/usr/share/logstash/vendor/bundle/jruby/1.9/gems/logstash-filter-mutate-3.3.1/lib/logstash/filters/mutate.rb:252:in filter'", "/usr/share/logstash/logstash-core/lib/logstash/filters/base.rb:145:indo_filter'", "/usr/share/logstash/logstash-core/lib/logstash/filters/base.rb:164:in multi_filter'", "org/jruby/RubyArray.java:1613:ineach'", "/usr/share/logstash/logstash-core/lib/logstash/filters/base.rb:161:in multi_filter'", "/usr/share/logstash/logstash-core/lib/logstash/filter_delegator.rb:46:inmulti_filter'", "(eval):1300:in initialize'", "org/jruby/RubyArray.java:1613:ineach'", "(eval):1297:in initialize'", "org/jruby/RubyProc.java:281:incall'", "(eval):610:in filter_func'", "/usr/share/logstash/logstash-core/lib/logstash/pipeline.rb:398:infilter_batch'", "/usr/share/logstash/logstash-core/lib/logstash/pipeline.rb:379:in worker_loop'", "/usr/share/logstash/logstash-core/lib/logstash/pipeline.rb:342:instart_workers'"]}
[2018-04-26T19:27:10,919][FATAL][logstash.runner ] An unexpected error occurred! {:error=>#<NoMethodError: undefined method tr' for 0:Fixnum>, :backtrace=>["/usr/share/logstash/vendor/bundle/jruby/1.9/gems/logstash-filter-mutate-3.3.1/lib/logstash/filters/mutate.rb:344:inconvert_float'", "org/jruby/RubyMethod.java:120:in call'", "/usr/share/logstash/vendor/bundle/jruby/1.9/gems/logstash-filter-mutate-3.3.1/lib/logstash/filters/mutate.rb:313:inconvert'", "org/jruby/RubyHash.java:1342:in each'", "/usr/share/logstash/vendor/bundle/jruby/1.9/gems/logstash-filter-mutate-3.3.1/lib/logstash/filters/mutate.rb:299:inconvert'", "/usr/share/logstash/vendor/bundle/jruby/1.9/gems/logstash-filter-mutate-3.3.1/lib/logstash/filters/mutate.rb:252:in filter'", "/usr/share/logstash/logstash-core/lib/logstash/filters/base.rb:145:indo_filter'", "/usr/share/logstash/logstash-core/lib/logstash/filters/base.rb:164:in multi_filter'", "org/jruby/RubyArray.java:1613:ineach'", "/usr/share/logstash/logstash-core/lib/logstash/filters/base.rb:161:in multi_filter'", "/usr/share/logstash/logstash-core/lib/logstash/filter_delegator.rb:46:inmulti_filter'", "(eval):1300:in initialize'", "org/jruby/RubyArray.java:1613:ineach'", "(eval):1297:in initialize'", "org/jruby/RubyProc.java:281:incall'", "(eval):610:in filter_func'", "/usr/share/logstash/logstash-core/lib/logstash/pipeline.rb:398:infilter_batch'", "/usr/share/logstash/logstash-core/lib/logstash/pipeline.rb:379:in worker_loop'", "/usr/share/logstash/logstash-core/lib/logstash/pipeline.rb:342:instart_workers'"]}

2

It's a known bug that was recently introduced: logstash-plugins/logstash-filter-mutate#120

We're working on it.

2 Likes
3

Thanks yaauie. Will wait for filter-mutate update.

4

Version 3.3.2 of the Mutate Filter Plugin includes a fix; to use it with an existing installation of Logstash, you can use the logstash-plugin utility:

bin/logstash-plugin update logstash-filter-mutate
5

Thank You.

6

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