Hello.
We are testing pdns and would like to migrate to it in few days. Now I
have seen errors showing up in the pdns logs when I first query a domain
and (I presume) this domain is not in cache of pdns.
Error ist the following:
Backend reported permanent error which prevented lookup (GSQLBackend
unable to lookup 'limitis.com|ANY':Could not prepare statement: SELECT
content,ttl,prio,type,domain_id,disabled,name,auth FROM records WHERE
disabled=0 and name=? and domain_id=?: MySQL server has gone away), aborting
I activated general_log in MariaDB but do no see any error when this
statements are executed or in the error_log:
210929 10:25:57 14 Connect pdns@localhost as anonymous on pdns
14 Query SET SESSION TRANSACTION ISOLATION LEVEL
READ COMMITTED
14 Prepare SELECT
content,ttl,prio,type,domain_id,disabled,name,auth FROM records WHERE
disabled=0 and name=? and domain_id=?
14 Execute SELECT
content,ttl,prio,type,domain_id,disabled,name,auth FROM records WHERE
disabled=0 and name='testdomain.eu' and domain_id=18787
14 Reset stmt
14 Prepare select kind,content from domains,
domainmetadata where domainmetadata.domain_id=domains.id and name=?
14 Execute select kind,content from domains,
domainmetadata where domainmetadata.domain_id=domains.id and
name='testdomain.eu'
14 Reset stmt
If I execute the query "SELECT
content,ttl,prio,type,domain_id,disabled,name,auth FROM records WHERE
disabled=0 and name='testdomain.eu' and domain_id=18787" there are no
errors.
PDNS is pdns-4.5.1-1pdns.el8.x86_64
MariaDB is MariaDB-server-10.4.21-1.el8.x86_64
Rocky Linux release 8.4 (Green Obsidian)
After restaring pdns the errors have gone away, but seems strange to me.
Where could this errors come from? MySQL connection timeouts maybe? But
timeouts would result in the logs of mysql I'd asume.
Greetings,
Thomas
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