Jing Zhao created HADOOP-9735:
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Summary: Deprecated configuration property can overwrite
non-deprecated property
Key: HADOOP-9735
URL: https://issues.apache.org/jira/browse/HADOOP-9735
Project: Hadoop Common
Issue Type: Bug
Affects Versions: 3.0.0, 2.1.0-beta
Reporter: Jing Zhao
Assignee: Jing Zhao
Priority: Minor
Attachments: deprecated-conf.test.patch
For the current Configuration implementation, if a conf file contains
definitions for both a non-deprecated property and its corresponding deprecated
property (e.g., fs.defaultFS and fs.default.name), the latter will overwrite
the previous one. In the fs.defaultFS example, this may cause client failover
not work. It may be better to keep the non-deprecated property's value
unchanged.
In the meanwhile, Configuration#getPropertySources may return wrong source
information for a deprecated property. E.g., after setting fs.defaultFS,
Configuration#getPropertySources("fs.default.name") will return "because
fs.defaultFS is deprecated".
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