boroknagyz opened a new pull request, #8561:
URL: https://github.com/apache/hadoop/pull/8561
Adds support for opening HDFS files with pre-fetched block locations,
eliminating redundant NameNode RPCs when callers already have cached block
metadata.
Changes:
- DFSClient.open() overload accepting LocatedBlocks
- DistributedFileSystem.openFileWithOptions() override that extracts
LocatedBlocks from HdfsLocatedFileStatus passed via withFileStatus()
- DistributedFileSystem.cloneDataInputStream() to create independent file
handles reusing block locations from an existing stream
- libhdfs hdfsCloneFile() C API for cloning file handles via JNI
- Integration tests verifying no NameNode RPC on clone/open with status
Contains content generated by Claude Opus 4.6
<!--
Thanks for sending a pull request!
1. If this is your first time, please read our contributor guidelines:
https://cwiki.apache.org/confluence/display/HADOOP/How+To+Contribute
2. Make sure your PR title starts with JIRA issue id, e.g.,
'HADOOP-17799. Your PR title ...'.
-->
### Description of PR
Adds support for opening HDFS files with pre-fetched block locations,
eliminating redundant NameNode RPCs when callers already have cached block
metadata.
### How was this patch tested?
Unit tests.
### For code changes:
- [x] Does the title or this PR starts with the corresponding JIRA issue id
(e.g. 'HADOOP-17799. Your PR title ...')?
- [ ] Object storage: have the integration tests been executed and the
endpoint declared according to the connector-specific documentation?
- [ ] If adding new dependencies to the code, are these dependencies
licensed in a way that is compatible for inclusion under [ASF
2.0](http://www.apache.org/legal/resolved.html#category-a)?
- [ ] If applicable, have you updated the `LICENSE`, `LICENSE-binary`,
`NOTICE-binary` files?
### AI Tooling
If an AI tool was used:
- [x] The PR includes the phrase "Contains content generated by <tool>"
where <tool> is the name of the AI tool used.
- [x] My use of AI contributions follows the ASF legal policy
https://www.apache.org/legal/generative-tooling.html
--
This is an automated message from the Apache Git Service.
To respond to the message, please log on to GitHub and use the
URL above to go to the specific comment.
To unsubscribe, e-mail: [email protected]
For queries about this service, please contact Infrastructure at:
[email protected]
---------------------------------------------------------------------
To unsubscribe, e-mail: [email protected]
For additional commands, e-mail: [email protected]
