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  1. The following settings are required in hive-site.xml to enable ACID support for streaming:
    1. hive.txn.manager = org.apache.hadoop.hive.ql.lockmgr.DbTxnManager
    2. hive.compactor.initiator.on = truetrue (See more important details here)
    3. hive.compactor.worker.threads > 0 
  2. “stored as orc” must be specified during table creation. Only ORC storage format is supported currently.
  3. tblproperties("transactional"="true") must be set on the table during creation.
  4. The Hive table must be bucketed, but not sorted. So something like “clustered by (colName) into 10 buckets” must be specified during table creation. The number of buckets is ideally the same as the number of streaming writers.
  5. User of the client streaming process must have the necessary permissions to write to the table or partition and create partitions in the table.
  6. (Temporary requirements) When issuing queries on streaming tables, the client needs to set

    1. hive.vectorized.execution.enabled  to  false     (for Hive version < 0.14.0)

    2. hive.input.format  to  org.apache.hadoop.hive.ql.io.HiveInputFormat

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