When I try to send a message to the contacts stored in a MySQL database, I’m getting the “Cannot perform this operation on a closed dataset” error. Is there a fix?
The error occurs because the net_write_timeout in MySQL is too low. MySQL server terminates the connection very quickly. The timeout in MySQL server is most likely set to 60 sec. Try to increase the timeout in the etc/my.cnf file to 3600 sec.
and then re-start MySQL server.
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