# Aurora MySQL database engine updates: 2016-09-20 (version 1.7.1) (Deprecated)
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**Version:** 1.7.1

## Improvements
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+ Fixes an issue where an Aurora Replica crashes if the InnoDB full-text search cache is full.
+ Fixes an issue where the database engine crashes if a worker thread in the thread pool waits for itself.
+ Fixes an issue where an Aurora Replica crashes if a metadata lock on a table causes a deadlock.
+ Fixes an issue where the database engine crashes due to a race condition between two worker threads in the thread pool.
+ Fixes an issue where an unnecessary failover occurs under heavy load if the monitoring agent doesn't detect the advancement of write operations to the distributed storage subsystem.