# Error : panic: runtime error: makeslice: len out of range
**URL:** https://discuss.elastic.co/t/error-panic-runtime-error-makeslice-len-out-of-range/229840
**Category:** Beats
**Tags:** filebeat
**Created:** [April 26, 2020, 12:26pm UTC](https://discuss.elastic.co/t/error-panic-runtime-error-makeslice-len-out-of-range/229840 "2020-04-26T12:26:25Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@JavaDeveloper](https://discuss.elastic.co/u/JavaDeveloper)
#### Post date: [April 26, 2020, 12:26pm UTC](https://discuss.elastic.co/t/error-panic-runtime-error-makeslice-len-out-of-range/229840/1 "2020-04-26T12:26:26Z")
Hello.
I'm using one of the community filebeats called [mqttbeat](https://github.com/nathan-K-/mqttbeat/) written by Go language.
I configured it, so that it connects to my own mqtt broker and ships data to the elasticsearch properly.
However, after 1 hour, this filebeat was disconnected due to the following reason:
```auto
panic: runtime error: makeslice: len out of range
```
My broker was sending nearly 500 messages per second to this mqttFilebeat.
Sorry! I know this issue is not related to the official Elastic stack. but I do not know how do I have to solve it.
On the other hand, I need it but the official MQTT input of the Elastic Filebeat is not published yet.
How can I solve the above problem?
---
### Author:  [@kvch](https://discuss.elastic.co/u/kvch)
#### Post date: [April 27, 2020, 2:56pm UTC](https://discuss.elastic.co/t/error-panic-runtime-error-makeslice-len-out-of-range/229840/2 "2020-04-27T14:56:41Z")
Could you please share the whole trace and more logs for the Beat?
---
### Author:  [@system](https://discuss.elastic.co/u/system)
#### Post date: [May 25, 2020, 3:01pm UTC](https://discuss.elastic.co/t/error-panic-runtime-error-makeslice-len-out-of-range/229840/3 "2020-05-25T15:01:24Z")
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