Re: MySQL dieing with "Failing assertion: btr_page_get_next(get_block->frame, mtr) == page_get_page_no(page)"

[Shawn Green]

That is a message from the InnoDB storage engine telling you that on two of the leaf pages in the doubly-linked-list Btree structure that it uses to store your data, the "next" pointer of one page and the "back" pointer of the other page are not pointing at each other. This is potentially a sign your data has been modified (on disk) by some process outside of the control of mysqld or that your system died before both pages could be updated to point at each other (eg. the writes were interrupted or corrupted by a power failure)

You should restore from your most recent backup as soon as practical. Then apply any Binary Log content created since that backup to bring your data current.
http://dev.mysql.com/doc/refman/5.7/en/point-in-time-recovery.html

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Shawn Green
MySQL Senior Principal Technical Support Engineer
Oracle USA, Inc. - Integrated Cloud Applications & Platform Services