# Logstash is periodically hanging (unresponsive). How to recognize and fix? **URL:** \ **Category:** Logstash\ **Created:** [May 31, 2019, 9:37pm UTC](https://discuss.elastic.co/t/logstash-is-periodically-hanging-unresponsive-how-to-recognize-and-fix/183794 "2019-05-31T21:37:43Z")\ **Posts on this page:** 1\ **Showing post:** 4
**Author:** ![PaulDonskikh](https://avatars.discourse-cdn.com/v4/letter/p/ecae2f/32.png) [@PaulDonskikh](https://discuss.elastic.co/u/PaulDonskikh)\ **Post date:** [June 14, 2019, 9:56pm UTC](https://discuss.elastic.co/t/logstash-is-periodically-hanging-unresponsive-how-to-recognize-and-fix/183794/4 "2019-06-14T21:56:04Z")
Found a related topic with no found solutions > [@Logstash Hangs (thread blocked)](https://discuss.elastic.co/t/logstash-hangs-thread-blocked/137655): > > Hi Everyone, We're running a Logstash pipeline with TCP input \> JSON filter \> ES output, and most of the time it goes great, except sometimes logstash will stop inserting data into ES without any log that we could find, and without crashing. It just hangs and stops processing data. The frequency of such 'freezes' is variable, roughly every one or two days. We send data to the TCP input (with SSL) from about 10 devices, at around 3 logs/second. The monitoring API shows that a worker thread som… --- _[View the full topic](https://discuss.elastic.co/t/logstash-is-periodically-hanging-unresponsive-how-to-recognize-and-fix/183794)._