datanucleus.fixedDatastore should be true in hive-default.xml
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Key: HIVE-1841
URL: https://issues.apache.org/jira/browse/HIVE-1841
Project: Hive
Issue Type: Improvement
Components: Configuration
Affects Versions: 0.6.0
Reporter: Edward Capriolo
Fix For: 0.7.0
Two datanucleus variables:
{noformat}
<property>
<name>datanucleus.autoCreateSchema</name>
<value>false</value>
</property>
<property>
<name>datanucleus.fixedDatastore</name>
<value>true</value>
</property>
{noformat}
are dangerous. We do want the schema to auto-create itself, but we do not want
the schema to auto update itself.
Someone might accidentally point a trunk at the wrong meta-store and
unknowingly update. I believe we should set this to false and possibly trap
exceptions stemming from hive wanting to do any update. This way someone has to
actively acknowledge the update, by setting this to true and then starting up
hive, or leaving it false, removing schema modifies for the user that hive
usages, and doing all the time and doing the updates by hand.
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