I have an innodb table with about 70M rows. Recently a cron job to back it up with mysqldump started failing at the same row.

Mysqlcheck also fails.

Mysqlanalyze runs fine and prints OK.

Alter table also fails with an orphan temporary table starting with # which I need to nuke later.

Here is the configuration:

event_scheduler = ON
innodb_buffer_pool_size = 6G
**wait_timeout = 3600**
innodb_flush_log_at_trx_commit  = 1
sync_binlog     = 1
bind-address            =
key_buffer_size         = 32M
max_allowed_packet      = 64M
thread_stack            = 192K
thread_cache_size       = 8
tmp_table_size          = 3G
max_heap_table_size     = 3G
myisam-recover-options  = BACKUP
max_connections        = 500

Host is on ubuntu 16.04.1, MySQL Ver 14.14 Distrib 5.7.19, for Linux (x86_64) using EditLine wrapper.

Any insight is highly appreciated.

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