# 1.8.0 qan bug

**URL:** <https://forums.percona.com/t/1-8-0-qan-bug/6232>\
**Category:** PMM 1.x\
**Created:** [March 6, 2018, 12:01am UTC](https://forums.percona.com/t/1-8-0-qan-bug/6232 "2018-03-06T00:01:55Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![scar2yjs](https://avatars.discourse-cdn.com/v4/letter/s/5f9b8f/32.png) [@scar2yjs](https://forums.percona.com/u/scar2yjs)\
**Post date:** [March 6, 2018, 12:01am UTC](https://forums.percona.com/t/1-8-0-qan-bug/6232/1 "2018-03-06T00:01:55Z")

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after update 1.8.0 pmm server, qan make to many db connection process.  
endpoint is not changed anything. and dns resolve is no problem.

see logs .  
WARNING mrms-monitor Cannot connect to MySQL pmm:_**@tcp(-- :3306): lookup – on 110.12.10.2:53: no such host: %!s()  
ERROR qan-analyzer-mysql-d2cf0aca dial tcp: lookup – on 110.2.0.2:53: no such host  
WARNING mrms-monitor Cannot connect to MySQL pmm:**_@tcp(–:3306): lookup – on 110.12.10.2:53: no such host: %!s()  
ERROR qan-analyzer-mysql-f7e048b9 dial tcp: lookup–: too many open files  
ERROR qan-analyzer-mysql-3d83a61d dial tcp: lookup – on 110.2.0.2:53: no such host  
ERROR qan-analyzer-mysql-d2cf0aca dial tcp: lookup – on 110.2.0.2:53: no such host