shkhrgpt opened a new pull request, #7918:
URL: https://github.com/apache/hadoop/pull/7918
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### Description of PR
DiskChecker was enhanced to do checking with some i/o in
[HADOOP-13738](https://issues.apache.org/jira/browse/HADOOP-13738). But this
was rolled back partially because of fsync issue seen in
[HADOOP-15450](https://issues.apache.org/jira/browse/HADOOP-15450) and the
problem of disk full being flagged as a check failure
([HDFS-13538](https://issues.apache.org/jira/browse/HDFS-13538)).
This PR tries to address
[HDFS-13538](https://issues.apache.org/jira/browse/HDFS-13538) and enable i/o
based disk checking ONLY for HDFS with a flag that can be turned on in dfs
configs.
### How was this patch tested?
```
[INFO] -------------------------------------------------------
[INFO] T E S T S
[INFO] -------------------------------------------------------
[INFO] Running org.apache.hadoop.util.TestDiskCheckerWithDiskIo
[INFO] Tests run: 6, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.129
s -- in org.apache.hadoop.util.TestDiskCheckerWithDiskIo
[INFO]
[INFO] Results:
[INFO]
[INFO] Tests run: 6, Failures: 0, Errors: 0, Skipped: 0
[INFO]
------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO]
------------------------------------------------------------------------
[INFO] Total time: 35:00 min
[INFO] Finished at: 2025-08-29T01:17:06+05:30
[INFO]
------------------------------------------------------------------------
```
### 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?
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