Mingliang Liu created HDFS-9304:
-----------------------------------
Summary: Add HdfsClientConfigKeys class to
TestHdfsConfigFields#configurationClasses
Key: HDFS-9304
URL: https://issues.apache.org/jira/browse/HDFS-9304
Project: Hadoop HDFS
Issue Type: Sub-task
Reporter: Mingliang Liu
Assignee: Mingliang Liu
*tl;dr* Since {{HdfsClientConfigKeys}} holds client side config keys, we need
to add this class to {{TestHdfsConfigFields#configurationClasses}}.
Now the {{TestHdfsConfigFields}} unit test passes because {{DFSConfigKeys}}
still contains all the client side config keys, though marked @deprecated. As
we add new client config keys (e.g. [HDFS-9259]), the unit test will fail with
the following error:
{quote}
hdfs-default.xml has 1 properties missing in class
org.apache.hadoop.hdfs.DFSConfigKeys
{quote}
If the logic is to make the {{DFSConfigKeys}} and {{HdfsClientConfigKeys}}
together cover all config keys in {{hdfs-default.xml}}, we need to put both of
them in {{TestHdfsConfigFields#configurationClasses}}.
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