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https://issues.apache.org/jira/browse/HADOOP-18410?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17581974#comment-17581974
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ASF GitHub Bot commented on HADOOP-18410:
-----------------------------------------
steveloughran opened a new pull request, #4766:
URL: https://github.com/apache/hadoop/pull/4766
Lots more logging at debug, more comments, *no idea why async drain
doesn't work*
also, adaptive changed the stream to go from sequential to random on
unbuffer(),
as it is clear the caller is doing clever things. Still doesn't make things
work.
### How was this patch tested?
staring at test results all afternoon commenting lines on and off.
no regression testing of existing 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?
> S3AInputStream.unbuffer() async drain not releasing http connections
> --------------------------------------------------------------------
>
> Key: HADOOP-18410
> URL: https://issues.apache.org/jira/browse/HADOOP-18410
> Project: Hadoop Common
> Issue Type: Sub-task
> Components: fs/s3
> Affects Versions: 3.3.9
> Reporter: Steve Loughran
> Assignee: Steve Loughran
> Priority: Major
>
> Impala tcp-ds setup to s3 is hitting problems with timeout fetching http
> connections from the s3a fs pool. Disabling s3a async drain makes this
> problem *go away*. assumption, either those async ops are blocking, or they
> are not releasing references properly.
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