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1.8.0 qan bug

scar2yjsscar2yjs ContributorCurrent User Role Beginner
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(<nil>)
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(<nil>)
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
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