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  1. Hive
  2. HIVE-1841

datanucleus.fixedDatastore should be true in hive-default.xml

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Details

    • Improvement
    • Status: Closed
    • Minor
    • Resolution: Fixed
    • 0.6.0
    • 2.0.0
    • Configuration, Metastore
    • None
    • Incompatible change

    Description

      Two datanucleus variables:

      <property>
 <name>datanucleus.autoCreateSchema</name>
 <value>false</value>
</property>

<property>
 <name>datanucleus.fixedDatastore</name>
 <value>true</value>
</property>

      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.

      Attachments

        1. HIVE-1841.1.patch.txt
          0.6 kB
          Carl Steinbach
        2. HIVE-1841.patch
          2 kB
          Ashutosh Chauhan
        3. HIVE-1841.2.patch
          7 kB
          Ashutosh Chauhan

        Issue Links

          depends upon

          Improvement - An improvement or enhancement to an existing feature or task. HIVE-1530 Include hive-default.xml and hive-log4j.properties in hive-common JAR

          • Major - Major loss of function.
          • Resolved
          is duplicated by

          Improvement - An improvement or enhancement to an existing feature or task. HIVE-7129 Change datanucleus.fixedDatastore config to true

          • Major - Major loss of function.
          • Resolved
          is related to

          Bug - A problem which impairs or prevents the functions of the product. HIVE-6113 Upgrade DataNucleus [was: Unable to instantiate org.apache.hadoop.hive.metastore.HiveMetaStoreClient]

          • Critical - Crashes, loss of data, severe memory leak.
          • Closed
          relates to

          Bug - A problem which impairs or prevents the functions of the product. HIVE-14152 datanucleus.autoStartMechanismMode should set to 'Ignored' to allow rolling downgrade

          • Major - Major loss of function.
          • Closed

          Bug - A problem which impairs or prevents the functions of the product. HIVE-14322 Postgres db issues after Datanucleus 4.x upgrade

          • Major - Major loss of function.
          • Closed

          Improvement - An improvement or enhancement to an existing feature or task. HIVE-3764 Support metastore version consistency check

          • Major - Major loss of function.
          • Closed

          Activity

            People

              ashutoshc Ashutosh Chauhan
              appodictic Edward Capriolo
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              Dates

                Created:
                Updated:
                Resolved: