Mingliang Liu created HDFS-10556:
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Summary: DistCpOptions should be validated automatically
Key: HDFS-10556
URL: https://issues.apache.org/jira/browse/HDFS-10556
Project: Hadoop HDFS
Issue Type: Bug
Affects Versions: 2.8.0
Reporter: Mingliang Liu
Assignee: Mingliang Liu
{{DistCpOptions}} can be set from command-line or may be set manually. In
[HDFS-10397], we refactored the validation to make it simpler and more
efficient. However, the newly added {{validate()}} method may not be
automatically revoked. This is the major concern for existing downstreams that
create the {{DistCpOptions}} manually instead of by parser, and have
conflicting options.
This jira is to make the validation happen automatically. A simple fix is to
use the approach that validates in individual setters. This is a fix for
{{branch-2}}. As a long-term fix, in [HDFS-10533], we're making the
{{DistCpOptions}} immutable so that it will be hard, if not impossible, to use
it wrongly by downstream applications. However, that code will only go to
{{trunk}} branch as it breaks backwards-compatibility.
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