LoggingResearch created MAPREDUCE-7488:
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Summary: Missing System Output for Misconfiguration in Local Mode
Settings
Key: MAPREDUCE-7488
URL: https://issues.apache.org/jira/browse/MAPREDUCE-7488
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-common/src/main/java/org/apache/hadoop/mapred/LocalClientProtocolProvider.java`{}}}，
in {{`create`}} method, from Line 37 - 39.
Reporter: LoggingResearch
Attachments: LocalClientProtocolProviderTest.java,
original-vs-log-enhanced.md
Enabling {{local mode}} in {{mapreduce}} requires setting the
{{mapreduce.framework.name}} configuration parameter to {{{}local{}}}. However,
users who are unfamiliar with configuration parameters may struggle to do this
correctly. The system currently lacks runtime output indicating whether this
configuration has taken effect, leading to confusion and a higher likelihood of
misconfiguration.
*Expected Behavior:*
If the system fails to activate the {{LocalJobRunner}} because the
{{mapreduce.framework.name}} parameter is not set to {{{}local{}}}, a warning
should be output to notify the user.
*How-to-Fix:*
We propose enhancing system observability and diagnosability by adding logging.
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