# Warning \[org.logstash.instrument.metrics.gauge.LazyDelegatingGauge\] after updating to 7.16.1

**URL:** <https://discuss.elastic.co/t/warning-org-logstash-instrument-metrics-gauge-lazydelegatinggauge-after-updating-to-7-16-1/292049>\
**Category:** Logstash\
**Tags:** docker\
**Created:** [December 15, 2021, 8:43pm UTC](https://discuss.elastic.co/t/warning-org-logstash-instrument-metrics-gauge-lazydelegatinggauge-after-updating-to-7-16-1/292049 "2021-12-15T20:43:02Z")\
**Posts on this page:** 3\
**Page:** 1

<div class="post-metadata">

**Author:** ![d71247](https://avatars.discourse-cdn.com/v4/letter/d/47e85d/32.png) [@d71247](https://discuss.elastic.co/u/d71247)\
**Post date:** [December 15, 2021, 8:43pm UTC](https://discuss.elastic.co/t/warning-org-logstash-instrument-metrics-gauge-lazydelegatinggauge-after-updating-to-7-16-1/292049/1 "2021-12-15T20:43:02Z")

</div>

Hello,  
I just updated my Logstash to 7.16.1... but I noticed warning in my conf when starting Logstash.  
the same conf of Logstash works well in version 7.9.1  
How do to fix this warning ?

I am using a Logstash docker image: 7.16.1

[WARN][org.logstash.instrument.metrics.gauge.LazyDelegatingGauge][log\_matchportail] A gauge metric of an unknown type (org.jruby.specialized.RubyArrayOneObject) has been created for key: send\_to. This may result in invalid serialization. It is recommended to log an issue to the responsible developer/development team.

---

<div class="post-metadata">

**Author:** ![yaauie](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/yaauie/32/23363_2.png) [@yaauie](https://discuss.elastic.co/u/yaauie)\
**Post date:** [December 15, 2021, 9:07pm UTC](https://discuss.elastic.co/t/warning-org-logstash-instrument-metrics-gauge-lazydelegatinggauge-after-updating-to-7-16-1/292049/2 "2021-12-15T21:07:37Z")

</div>

looks like an occurrance of [Warning in logs =\> A gauge metric of an unknown type (org.jruby.specialized.RubyArrayOneObject) has been created for key: send\_to · Issue #13106 · elastic/logstash · GitHub](https://github.com/elastic/logstash/issues/13106) and can safely be ignored.

---

<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:** [January 12, 2022, 9:08pm UTC](https://discuss.elastic.co/t/warning-org-logstash-instrument-metrics-gauge-lazydelegatinggauge-after-updating-to-7-16-1/292049/3 "2022-01-12T21:08:05Z")

</div>

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