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https://issues.apache.org/jira/browse/HDFS-11039?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18099718#comment-18099718
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ASF GitHub Bot commented on HDFS-11039:
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joseluisll opened a new pull request, #8637:
URL: https://github.com/apache/hadoop/pull/8637
### Description of PR
Documents **42 configuration properties** in `hdfs-default.xml` that are read
by production code but were previously discoverable only by reading the
source. Every property listed below is live and non-deprecated: each read
site was verified, none appears in any `DeprecationDelta` table, and none
carries a deprecated constant. This answers the question asked on HDFS-11039
in 2018 — *which* properties should be added.
**No production code is changed.** The diff touches exactly two files:
`hdfs-default.xml` (+42 `<property>` entries, 1 rename of a deprecated
property name to its current one) and `TestHdfsConfigFields.java` (skip-list
bookkeeping only, explained below).
#### The 42 properties
| Property | Default | Rationale |
| -
> Expose more configuration properties to hdfs-default.xml
> --------------------------------------------------------
>
> Key: HDFS-11039
> URL: https://issues.apache.org/jira/browse/HDFS-11039
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: documentation, newbie
> Reporter: Yi Liu
> Assignee: Jennica Pounds
> Priority: Minor
>
> There are some configuration properties for hdfs, but have not been exposed
> in hdfs-default.xml.
> It's convenient for Hadoop user/admin if we add them in the hdfs-default.xml.
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