# SNMP Trap listener died Address already in use caused by problems with files in \`\`yamlmibdir\`\`

**URL:** https://discuss.elastic.co/t/snmp-trap-listener-died-address-already-in-use-caused-by-problems-with-files-in-yamlmibdir/221029
**Category:** Logstash
**Created:** [February 26, 2020, 11:32am UTC](https://discuss.elastic.co/t/snmp-trap-listener-died-address-already-in-use-caused-by-problems-with-files-in-yamlmibdir/221029 "2020-02-26T11:32:40Z")
**Posts on this page:** 2
**Page:** 1

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### Author: ![mjuenema](https://avatars.discourse-cdn.com/v4/letter/m/dec6dc/32.png) [@mjuenema](https://discuss.elastic.co/u/mjuenema)
#### Post date: [February 26, 2020, 11:32am UTC](https://discuss.elastic.co/t/snmp-trap-listener-died-address-already-in-use-caused-by-problems-with-files-in-yamlmibdir/221029/1 "2020-02-26T11:32:40Z")

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This issue has been discussed several times but it seems that this can be caused when there are problems with the MIB files in `yamlmibdir`. The error message is completely misleading in this case.

References:

- [SNMP Trap listener died Address already in use](https://discuss.elastic.co/t/snmp-trap-listener-died-address-already-in-use/103146)
- [SNMP Trap listener died](https://discuss.elastic.co/t/snmp-trap-listener-died/49376)
- [SNMP Trap listener died?](https://discuss.elastic.co/t/snmp-trap-listener-died/47245)

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### Author: ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)
#### Post date: [March 25, 2020, 11:32am UTC](https://discuss.elastic.co/t/snmp-trap-listener-died-address-already-in-use-caused-by-problems-with-files-in-yamlmibdir/221029/2 "2020-03-25T11:32:45Z")

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