0.9.2 is the second maintenance release on 0.9 line and contains 85 bug fixes and improvements. Please see CHANGES.txt for more details: https://gitbox.apache.org/repos/asf?p=tez.git;a=blob_plain;f=CHANGES.txt;hb=refs/tags/rel/release-0.9.2 List of issues fixed in 0.9.2: https://issues.apache.org/jira/projects/TEZ/versions/12342390