# What does this error mean?

**URL:** <https://discuss.elastic.co/t/what-does-this-error-mean/1901>\
**Category:** Logstash\
**Created:** [June 4, 2015, 6:55am UTC](https://discuss.elastic.co/t/what-does-this-error-mean/1901 "2015-06-04T06:55:23Z")\
**Posts on this page:** 4\
**Page:** 1

<div class="post-metadata">

**Author:** ![yehosef](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/yehosef/32/42175_2.png) [@yehosef](https://discuss.elastic.co/u/yehosef)\
**Post date:** [June 4, 2015, 6:55am UTC](https://discuss.elastic.co/t/what-does-this-error-mean/1901/1 "2015-06-04T06:55:23Z")

</div>

I occasionally see errors that look like this in the logstash stdout:

Jun 04, 2015 8:48:01 AM org.elasticsearch.monitor.jvm.JvmMonitorService$JvmMonitor monitorLongGc  
WARNING: [logstash-es1-20422-9784] [gc][young][219][293] duration [1.5s], collections [1]/[2.5s], total [1.5s]/[16.3s], memory [373.6mb]-\>[56.2mb]/[483.3mb], all\_pools {[young] [103.7mb]-\>[868kb]/[133.3mb]}{[survivor] [16.6mb]-\>[0b]/[16.6mb]}{[old] [253.2mb]-\>[55.3mb]/[333.3mb]}

We're using this import for testing purposes to evaluate our server requirements - it's a single 16G machine (8GB heap) with almost 200M rows and +50GB of data stored generated from about 350GB of logs files (we have stored off for everything and using doc\_fields) - perhaps these errors is a sign that we're hitting a limit?

---

<div class="post-metadata">

**Author:** ![jrgns](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/jrgns/32/640_2.png) [@jrgns](https://discuss.elastic.co/u/jrgns)\
**Post date:** [June 4, 2015, 8:29am UTC](https://discuss.elastic.co/t/what-does-this-error-mean/1901/2 "2015-06-04T08:29:40Z")

</div>

It looks like the Garbage Collection on your Logstash instance took too long. In this case 1.5 seconds. You're probably right that you're hitting a limit.

---

<div class="post-metadata">

**Author:** ![yehosef](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/yehosef/32/42175_2.png) [@yehosef](https://discuss.elastic.co/u/yehosef)\
**Post date:** [June 4, 2015, 1:17pm UTC](https://discuss.elastic.co/t/what-does-this-error-mean/1901/3 "2015-06-04T13:17:08Z")

</div>

FYI - I upped the logstash heap to 2G and I haven't seen the error any more.

---

<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:** [July 6, 2017, 5:38am UTC](https://discuss.elastic.co/t/what-does-this-error-mean/1901/4 "2017-07-06T05:38:33Z")

</div>