The grok error


(Pinno Lin) #1

Hi,

I have a mail log data in [mail][suser] attribute in below, i want to get user account (ABC03245) to new attribute.

jamescc_chen@abc.com.tw;ABC03245|Jamescc Chen(James);abc::abc::User::FIN::PD;abc::abc::User::FIN;abc::abc::User;abc::Abc;abc

the Grok configure in below
grok {
match => { "[mail][suser]" => ";%{GREEDYDATA:LoginID}\"}
}

if add this grok condition in my config. Logstash always show error

Failed to execute action {:action=>LogStash::PipelineAction::Create/pipeline_id:main, :exception=>"LogStash::ConfigurationError", :message=>"Expected one of #, {, } at line 228

I check config many times. it not miss anything. so, i don't know what's problems??

thanks.


(Johan Rask) #2

I would recommend to use https://grokdebug.herokuapp.com/ to try out your grok expressions.
Your example gives an error due to the last backslash.


(Pinno Lin) #3

Hi JohanRask,

Thanks for your reply. Maybe i provide information not enough. sorry.
I had use grokdebug website to get grok pattern. it's correct.

jamescc_chen@abc.com.tw;ABC03245\|Jamescc Chen(James);abc::abc::User::FIN::PD;abc::abc::User::FIN;abc::abc::User;abc::Abc;abc

;%{GREEDYDATA:LoginID}\\

I make a simple config below, Logstash always show the error if use the grok. i don't know where has problems??

Thank a lot.

[2018-05-04T09:34:27,665][ERROR][logstash.agent ] Failed to execute action {:action=>LogStash::PipelineAction::Create/pipeline_id:main, :exception=>"LogStash::ConfigurationError", :message=>"Expected one of #, {, } at line 269, column 6 (byte 6653) after filter {\n\tif "LAB" in [tags] {\n\t\tgrok {\n match => { "[mail][suser]" => ";%{GREEDYDATA:LoginID}\\"}\n }\n }\t\n}\n\noutput {\n\tif "", :backtrace=>["/usr/share/logstash/logstash-core/lib/logstash/compiler.rb:42:in compile_imperative'", "/usr/share/logstash/logstash-core/lib/logstash/compiler.rb:50:incompile_graph'", "/usr/share/logstash/logstash-core/lib/logstash/compiler.rb:12:in block in compile_sources'", "org/jruby/RubyArray.java:2486:inmap'", "/usr/share/logstash/logstash-core/lib/logstash/compiler.rb:11:in compile_sources'", "/usr/share/logstash/logstash-core/lib/logstash/pipeline.rb:51:ininitialize'", "/usr/share/logstash/logstash-core/lib/logstash/pipeline.rb:169:in initialize'", "/usr/share/logstash/logstash-core/lib/logstash/pipeline_action/create.rb:40:inexecute'", "/usr/share/logstash/logstash-core/lib/logstash/agent.rb:315:in block in converge_state'", "/usr/share/logstash/logstash-core/lib/logstash/agent.rb:141:inwith_pipelines'", "/usr/share/logstash/logstash-core/lib/logstash/agent.rb:312:in block in converge_state'", "org/jruby/RubyArray.java:1734:ineach'", "/usr/share/logstash/logstash-core/lib/logstash/agent.rb:299:in converge_state'", "/usr/share/logstash/logstash-core/lib/logstash/agent.rb:166:inblock in converge_state_and_update'", "/usr/share/logstash/logstash-core/lib/logstash/agent.rb:141:in with_pipelines'", "/usr/share/logstash/logstash-core/lib/logstash/agent.rb:164:inconverge_state_and_update'", "/usr/share/logstash/logstash-core/lib/logstash/agent.rb:90:in execute'", "/usr/share/logstash/logstash-core/lib/logstash/runner.rb:348:inblock in execute'", "/usr/share/logstash/vendor/bundle/jruby/2.3.0/gems/stud-0.0.23/lib/stud/task.rb:24:in `block in initialize'"]}

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#4

I think that the problem is that

  "%GREEDYDATA:LoginID\\"

escapes the double quote, not the backslash. I am unable to find a way to escape the backslash. Not single \, not double \, not triple \.


#5

So we have to get the backslashes away from the quotes. This works in grok

";%{GREEDYDATA:LoginID}\\."

although this would be a lot cheaper

dissect { mapping => "[mail][suser] => "%{};%{LoginID}\%{}" } }

(Pinno Lin) #6

Hi Badger,

  Thanks for you reply and suggestion. it resolve my problems.

(system) #7

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