LoggingResearch created MAPREDUCE-7487:
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Summary: Missing System Output for Misconfiguration in
KeyFieldBasedPartitioner Settings
Key: MAPREDUCE-7487
URL: https://issues.apache.org/jira/browse/MAPREDUCE-7487
Project: Hadoop Map/Reduce
Issue Type: Improvement
Components: mapreduce-client
Affects Versions: 3.3.6
Environment: Version: {{`3.3.6`}}
Location:
{{{}hadoop/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/main/java/org/apache/hadoop/mapreduce/lib/partition/KeyFieldBasedPartitioner.java{}}}，
in {{`setConf`}} method, from Line 76 - 77.
Reporter: LoggingResearch
Attachments: KeyFieldBasedPartitionerTest.java,
original-vs-log-enhanced.md
To effectively use {{{}KeyFieldBasedPartitioner{}}}, users can optionally set
the {{mapreduce.partition.keypartitioner.options}} configuration parameter to
define partitioning behavior. However, this parameter is not documented in
{{{}mapreduce-default.xml{}}}, leaving users without guidance on how to
properly configure it. This omission hinders users from fully leveraging the
system’s configurability.
*Expected Behavior:*
The system should provide warnings or informative logs to guide users in case
of misconfiguration. Relying solely on users to carefully read through the
configuration documentation is insufficient, particularly when the necessary
details are not included in the documentation.
*How-to-Fix:*
To improve user experience, we suggest enhancing the system with additional
logging to expose these configurations and their correct usage.
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