# Cannot access @metadata of dead\_letter\_queue in 7.6.0

**URL:** <https://discuss.elastic.co/t/cannot-access-metadata-of-dead-letter-queue-in-7-6-0/221240>\
**Category:** Logstash\
**Created:** [February 27, 2020, 12:39pm UTC](https://discuss.elastic.co/t/cannot-access-metadata-of-dead-letter-queue-in-7-6-0/221240 "2020-02-27T12:39:10Z")\
**Posts on this page:** 3\
**Page:** 1

<div class="post-metadata">

**Author:** ![roflmao](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/roflmao/32/21606_2.png) [@roflmao](https://discuss.elastic.co/u/roflmao)\
**Post date:** [February 27, 2020, 12:39pm UTC](https://discuss.elastic.co/t/cannot-access-metadata-of-dead-letter-queue-in-7-6-0/221240/1 "2020-02-27T12:39:11Z")

</div>

> dead\_letter\_queue {  
> path =\> "/usr/share/logstash/data/dead\_letter\_queue/"  
> pipeline\_id =\> "main"  
> commit\_offsets =\> true  
> }

Trying to do stdout { codec =\> rubycodec { metadata =\> true } fails logstash from starting:

> │ logstash [2020-02-27T12:35:48,091][ERROR][logstash.agent] Failed to execute action {:action=\>LogStash::PipelineAction::Create/pipeline\_id:main, :exception=\>"LogStash::ConfigurationError", :message=\>"Expected one of [A-Za-z0-9\_-], [ \t\r\ │  
> │ \n], "#", "{", [A-Za-z0-9\_], "}" at line 3, column 23 (byte 44) after output {\n stdout { \n codec =\> rubydebug", :backtrace=\>["/usr/share/logstash/logstash-core/lib/logstash/compiler.rb:47:in `compile_imperative'", "/usr/share/logstash/log │ │ stash-core/lib/logstash/compiler.rb:55:in `compile\_graph'", "/usr/share/logstash/logstash-core/lib/logstash/compiler.rb:17:in `block in compile_sources'", "org/jruby/RubyArray.java:2580:in `map'", "/usr/share/logstash/logstash-core/lib/logstash/compi │  
> │ ler.rb:14:in `compile_sources'", "org/logstash/execution/AbstractPipelineExt.java:161:in `initialize'", "org/logstash/execution/JavaBasePipelineExt.java:47:in `initialize'", "/usr/share/logstash/logstash-core/lib/logstash/java_pipeline.rb:27:in `init │  
> │ ialize'", "/usr/share/logstash/logstash-core/lib/logstash/pipeline\_action/create.rb:36:in `execute'", "/usr/share/logstash/logstash-core/lib/logstash/agent.rb:326:in `block in converge\_state'"]}  
> │ logstash [2020-02-27T12:35:49,419][ERROR][logstash.agent] Failed to execute action {:action=\>LogStash::PipelineAction::Create/pipeline\_id:main, :exception=\>"LogStash::ConfigurationError", :message=\>"Expected one of [A-Za-z0-9\_-], [ \t\r\ │  
> │ \n], "#", "{", [A-Za-z0-9\_], "}" at line 3, column 23 (byte 44) after output {\n stdout { \n codec =\> rubydebug", :backtrace=\>["/usr/share/logstash/logstash-core/lib/logstash/compiler.rb:47:in `compile_imperative'", "/usr/share/logstash/log │ │ stash-core/lib/logstash/compiler.rb:55:in `compile\_graph'", "/usr/share/logstash/logstash-core/lib/logstash/compiler.rb:17:in `block in compile_sources'", "org/jruby/RubyArray.java:2580:in `map'", "/usr/share/logstash/logstash-core/lib/logstash/compi │  
> │ ler.rb:14:in `compile_sources'", "org/logstash/execution/AbstractPipelineExt.java:161:in `initialize'", "org/logstash/execution/JavaBasePipelineExt.java:47:in `initialize'", "/usr/share/logstash/logstash-core/lib/logstash/java_pipeline.rb:27:in `init │  
> │ ialize'", "/usr/share/logstash/logstash-core/lib/logstash/pipeline\_action/create.rb:36:in `execute'", "/usr/share/logstash/logstash-core/lib/logstash/agent.rb:326:in `block in converge\_state'"]}

While stdout { codec =\> rubydebug } without the metadata part works flawlessly (but doesnt show metadata)

Mutating the field into a var

> mutate {  
> add\_field =\> { "reason" =\> "%{[@metadata][dead\_letter\_queue][reason]}" }  
> }

gives this field:

> "reason":"%{[@metadata][dead\_letter\_queue][reason]}"

---

<div class="post-metadata">

**Author:** ![roflmao](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/roflmao/32/21606_2.png) [@roflmao](https://discuss.elastic.co/u/roflmao)\
**Post date:** [February 28, 2020, 7:52am UTC](https://discuss.elastic.co/t/cannot-access-metadata-of-dead-letter-queue-in-7-6-0/221240/2 "2020-02-28T07:52:05Z")

</div>

To me its not obvious how i can make use of the dlq if i cannot find the reason to why they are put there in the first place.

---

<div class="post-metadata">

**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\
**Post date:** [March 27, 2020, 7:52am UTC](https://discuss.elastic.co/t/cannot-access-metadata-of-dead-letter-queue-in-7-6-0/221240/3 "2020-03-27T07:52:14Z")

</div>

This topic was automatically closed 28 days after the last reply. New replies are no longer allowed.