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We're receiving the following error on every 1 hour.

Lost connection to MySQL server at 'reading initial communication packet', system error: 115 "Operation now in progress"

Any clue ?

  • Did you do any research yourself? I see a ton of answers for this on Google search results. – Colin 't Hart May 8 '14 at 9:23
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Make sure that you have set high value for max_allowed_packet and interactive_timeout variable. Prefarably set 16/32MB for max_allowed_packet and 28800 seconds (8 hours) for interactive_timeout

  • increased net_read_timeout value to 60 on mysql and also increased the timeout and maxconn values of haproxy on web-servers to access mysql master-slave server. I can't see a single abort_connections in mysql after increasing those values. max_allowed_packets are already set to 64M. Will update you if the issue occurs again. – shahzaib May 8 '14 at 11:06
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You can try to remove the line "skip-external-locking" in /etc/mysql/my.conf

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