Question What is the Pdo.php error meaning?

[msmile033]

I found my /var/log/message show the following messages every 5 minutes:

Jul 17 19:31:30 psa-fbb wdcollect: PHP Warning: Error while sending QUERY packet. PID=1825 in /usr/local/psa/admin/externals/Zend/Db/Statement/Pdo.php on line 228

But it did not show neither in before nor in my other hosts, I found it only persist in a single host.

What does it mean? And how can I fix it?

By the way, before this message shown, this host have experienced a memory exhausted incident and forced to reboot. The message began shown constantly after rebooted.

 

[IgorG]

Actually, it is just warning but not error. I think that it is related to some specific mysql server settings. You can try to increase max_allowed_packet or wait_timeout with following method - How to set the value of max_allowed_packet or wait_timeout for MySQL on a Plesk server?
Also, you could try to add options

skip-host-cache
skip-name-resolve

to /etc/my.cnf config file.