0.10.3 is the fourth release on 0.10 line and contains 69 bug fixes and improvements.

Please see CHANGES.txt for more details: https://raw.githubusercontent.com/apache/tez/refs/tags/rel/release-0.10.3/CHANGES.txt
List of issues fixed in 0.10.3: https://issues.apache.org/jira/projects/TEZ/versions/12352076