bobhan1 opened a new pull request, #67293:
URL: https://github.com/apache/doris/pull/67293
### What problem does this PR solve?
Issue Number: DORIS-28268
Related PR: None
Problem Summary:
`CachedRemoteFileReader::prefetch_range()` submits fire-and-forget dry-run
tasks. A running task keeps the cached reader and its underlying
`HdfsFileReader` alive, but it does not keep the query `RuntimeProfile` alive.
`HdfsFileReader::read_at_impl()` previously always updated `_total_read_time`,
so a delayed prefetch read could access that counter after the query profile
had been freed.
Skip the query-profile timer for dry-run reads. Normal HDFS reads keep their
existing profile accounting, and prefetch/cache-population behavior is
unchanged.
### Release note
None
### Check List (For Author)
- Test
- [ ] Regression test
- [ ] Unit Test
- [ ] Manual test (add detailed scripts or steps below)
- `./build.sh --be -j100` is running; the result will be updated
after completion.
- [ ] No need to test or manual test. Explain why:
- [ ] This is a refactor/code format and no logic has been changed.
- [ ] Previous test can cover this change.
- [ ] No code files have been changed.
- [ ] Other reason
- Behavior changed:
- [ ] No.
- [x] Yes. Dry-run HDFS reads no longer update the query `HdfsIO` timer;
data reads and file-cache population are unchanged.
- Does this need documentation?
- [x] No.
- [ ] Yes.
### Check List (For Reviewer who merge this PR)
- [ ] Confirm the release note
- [ ] Confirm test cases
- [ ] Confirm document
- [ ] Add branch pick label
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