HDDS-13574. Remove org.apache.hadoop.fs classes

[hevinhsu]

What changes were proposed in this pull request?

Clean up hacks introduced in HDDS-10511 and HDDS-8436.

Remove deprecated classes (ByteBufferPositionedReadable, LeaseRecoverable, SafeMode, SafeModeAction) no longer needed for Hadoop 3.1/3.2 support.

What is the link to the Apache JIRA

https://issues.apache.org/jira/browse/HDDS-13574

How was this patch tested?

https://github.com/hevinhsu/ozone/actions/runs/17062417289

[Copilot]

Pull Request Overview

This PR removes deprecated Hadoop filesystem classes that were temporarily added as compatibility hacks for Hadoop 3.1/3.2 support. These classes are now available in the standard Hadoop API, making the local copies unnecessary.

• Removes four deprecated interface classes from the org.apache.hadoop.fs package
• Cleans up temporary compatibility code introduced in previous JIRAs (HDDS-10511 and HDDS-8436)
• Eliminates duplicate code that is now available in newer Hadoop versions

Reviewed Changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated no comments.

File	Description
SafeModeAction.java	Removes enum defining safe mode actions (ENTER, LEAVE, FORCE_EXIT, GET)
SafeMode.java	Removes interface for filesystem safe mode operations
LeaseRecoverable.java	Removes interface for lease recovery capabilities
ByteBufferPositionedReadable.java	Removes interface for positioned ByteBuffer reading operations

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[peterxcli]

👍

[jojochuang]

Looks good could you also package-info.java?

ozone/hadoop-ozone/ozonefs-common/src/main/java/org/apache/hadoop/fs/package-info.java

Line 21 in 74e7471

* we drop Hadoop 3.1, 3.2 support.

[jojochuang]

Thanks @hevinhsu @peterxcli

[hevinhsu]

Thanks @peterxcli for the reviews and @jojochuang for the review and merge.