Flatten Component Does Not Work On Hive Parquet Storage in ODI 184.108.40.206.6
(Doc ID 2300840.1)
Last updated on SEPTEMBER 14, 2022
Applies to:Oracle Data Integrator - Version 220.127.116.11.6 to 18.104.22.168.0 [Release 12c]
Information in this document applies to any platform.
On Oracle Data Integrator (ODI) 22.214.171.124.6 when running a mapping where source is a Hive Parquet using "LKM Hive to Oracle OLH-OSCH Direct" and the Flatten component, the Flatten component is not able to explode the Hive Parquet and inject in the table. Even though the mapping execution completes successfully, no rows are inserted on target tables and the following messages can be observed in the ODI session logs:
17/06/30 16:05:43 INFO loader.OraLoader: Oracle Loader for Hadoop Release 3.8.0 - Production
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17/06/30 16:05:43 INFO loader.OraLoader: Built-Against: hadoop-2.2.0hive-0.13.0 avro-1.8.1 jackson-1.8.8
17/06/30 16:05:52 INFO loader.OraLoader: oracle.hadoop.loader.loadByPartition is disabled because table: <TABLE NAME> is not partitioned
17/06/30 16:05:52 INFO loader.OraLoader: oracle.hadoop.loader.enableSorting disabled, no sorting key provided
17/06/30 16:05:52 INFO loader.OraLoader: Reduce tasks set to 0 because of no partitioning or sorting. Loading will be done in the map phase.
17/06/30 16:05:52 INFO output.DBOutputFormat: Setting map tasks speculative execution to false for : oracle.hadoop.loader.lib.output.JDBCOutputFormat
Here is a simple representation for an incorrect mapping which would produce the issue:
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