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https://issues.apache.org/jira/browse/HADOOP-18410?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17582241#comment-17582241
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ASF GitHub Bot commented on HADOOP-18410:
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steveloughran commented on PR #4766:
URL: https://github.com/apache/hadoop/pull/4766#issuecomment-1221329260
as this draining code is used in prefetch too, i'm going to
1. create a StreamDrainer class which the prefetch stream will also switch
to; this code is fussy and I don't want duplicates
2. have it implement CallableWithIOE so can be passed in to submit(); no
need for an extra l-expression to invoke.
the isolation lets me add unit tests for its failure cases
* read returns -1 while data still remaining
* read() throws ioe
* remaining finishes while data remaining
* abort failure
> 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: Blocker
> Labels: pull-request-available
>
> 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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