Behavioral Changes in Hive

Behavioral changes denote a marked change in behavior from the previously released version to this version of Apache Hive.

Summary:
Timestamp Conversion Handling
Previous behavior:

In Cloudera Private Cloud Base 7.1.9 version, hive.strict.timestamp.conversion was set to true, enforcing strict failures when casting between timestamp and numeric types.

New behavior:
Starting from Cloudera Private Cloud Base 7.3.1 version, reverted the strict mode for timestamp to numeric conversions. CAST operations between timestamp and numeric types no longer fail by default.
Summary:
Change in the way compaction initiator and cleaner threads are handled
Previous behavior:
The compaction initiator and cleaner threads are enabled and disabled by setting the hive.compactor.initiator.on property to 'true' or 'false'.
New behavior:
A new property hive.compactor.cleaner.on is introduced that allows you to selectively enable or disable the cleaner thread.

This property is not listed and is set to 'true' by default. Add the property to Hive Metastore Server Advanced Configuration Snippet (Safety Valve) for hive-site.xml in Cloudera Manager to have the same out-of-the-box experience as in the previous version.

Also, ensure that you set the property to 'true' for the compactor to run on the HMS instance.