GitHub user akashrn5 opened a pull request:
https://github.com/apache/carbondata/pull/2585 [CARBONDATA-2805]fix the ordering mismatch of segment numbers during cutom compaction
### Problem:
when we have segments from 0 to 6 and i give 1, 2, 3 for custom compaction, then it should create 1.1 as compacted segment, but sometimes it will create 3.1 as compacted segment which is wrong. This is beacuse custom Segment IDs were passing in hashset and finally inserted in hashmap, while identifying segments to be merged. hashmap and hashset does not guarantee the insertion order which may lead to missmatch of segment numbers.
### Solution:
Use LinkedHashSet and LinkedHashMap which always sure about the insertion order.
Be sure to do all of the following checklist to help us incorporate
your contribution quickly and easily:
- [x] Any interfaces changed?
NA
- [x] Any backward compatibility impacted?
NA
- [x] Document update required?
NA
- [x] Testing done
Testing is done executing the custom compaction queries repeatedly and verified
Please provide details on
- Whether new unit test cases have been added or why no new tests are required?
- How it is tested? Please attach test report.
- Is it a performance related change? Please attach the performance test report.
- Any additional information to help reviewers in testing this change.
- [x] For large changes, please consider breaking it into sub-tasks under an umbrella JIRA.
NA
You can merge this pull request into a Git repository by running:
$ git pull
https://github.com/akashrn5/incubator-carbondata custom_compaction
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/carbondata/pull/2585.patchTo close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #2585
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commit f98279b85ffead594d33d35d241ea497b9e17834
Author: akashrn5 <akashnilugal@...>
Date: 2018-07-30T13:52:29Z
fix the mis ordering or segment numbers during cutom compaction
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Locked
