MySQL Error Message
Failed to start semi-sync ACK receiver thread, could not
      create thread(errno:%d).
Reason for the Error
ER_SEMISYNC_FAILED_TO_START_ACK_RECEIVER_THD
      was added in 8.0.4.
Failed to start semi-sync ACK receiver thread, could not
      create thread(errno:%d).
ER_SEMISYNC_FAILED_TO_START_ACK_RECEIVER_THD
      was added in 8.0.4.