# Does Log4J input block sender?

**URL:** <https://discuss.elastic.co/t/does-log4j-input-block-sender/39261>\
**Category:** Logstash\
**Created:** [January 14, 2016, 7:07pm UTC](https://discuss.elastic.co/t/does-log4j-input-block-sender/39261 "2016-01-14T19:07:17Z")\
**Posts on this page:** 3\
**Page:** 1

<div class="post-metadata">

**Author:** ![CraigFoote](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/craigfoote/32/4571_2.png) [@CraigFoote](https://discuss.elastic.co/u/CraigFoote)\
**Post date:** [January 14, 2016, 7:07pm UTC](https://discuss.elastic.co/t/does-log4j-input-block-sender/39261/1 "2016-01-14T19:07:17Z")

</div>

I'm interested in the Log4J Logstash input plugin but does it block the socketappender during heavy loads, etc.?

---

<div class="post-metadata">

**Author:** ![warkolm](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/warkolm/32/39224_2.png) [@warkolm](https://discuss.elastic.co/u/warkolm)\
**Post date:** [January 15, 2016, 5:41am UTC](https://discuss.elastic.co/t/does-log4j-input-block-sender/39261/2 "2016-01-15T05:41:04Z")

</div>

Any input, filter or output can block parts of the pipeline if they're busy enough.

---

<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, 5:15am UTC](https://discuss.elastic.co/t/does-log4j-input-block-sender/39261/3 "2017-07-06T05:15:40Z")

</div>

Closed on July 6, 2017, 5:15am UTC