日志信息如下：

InnoDB: ###### Diagnostic info printed to the standard error stream
InnoDB: Error: semaphore wait has lasted > 600 seconds
InnoDB: We intentionally crash the server, because it appears to be hung.
2018-07-27 00:23:29 7f994266f700  InnoDB: Assertion failure in thread 140296220768000 in file srv0srv.cc line 1756
InnoDB: We intentionally generate a memory trap.
InnoDB: Submit a detailed bug report to http://bugs.mysql.com.
InnoDB: If you get repeated assertion failures or crashes, even
InnoDB: immediately after the mysqld startup, there may be
InnoDB: corruption in the InnoDB tablespace. Please refer to
InnoDB: http://dev.mysql.com/doc/refman/5.6/en/forcing-innodb-recovery.html
InnoDB: about forcing recovery.
/usr/sbin/mysqld(my_print_stacktrace+0x35)[0x8e45b5]
/usr/sbin/mysqld(handle_fatal_signal+0x494)[0x668b64]
/lib64/libpthread.so.0[0x3ac4a0f7e0]
/lib64/libc.so.6(gsignal+0x35)[0x395fe32625]
/lib64/libc.so.6(abort+0x175)[0x395fe33e05]
/usr/sbin/mysqld[0xa0615f]
/lib64/libpthread.so.0[0x3ac4a07aa1]
/lib64/libc.so.6(clone+0x6d)[0x395fee893d]
180727 00:23:29 mysqld_safe Number of processes running now: 0
180727 00:23:29 mysqld_safe mysqld restarted