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https://issues.apache.org/jira/browse/HADOOP-13973?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15869924#comment-15869924
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Steve Loughran commented on HADOOP-13973:
-----------------------------------------
Later httpclients move to ConnectionClosedException. A cause is
possibly/probably us calling abort() on a connection which is still in the
pool, and so being picked up again
> S3A get requests failing: java.lang.IllegalStateException: Connection is not
> open
> ---------------------------------------------------------------------------------
>
> Key: HADOOP-13973
> URL: https://issues.apache.org/jira/browse/HADOOP-13973
> Project: Hadoop Common
> Issue Type: Sub-task
> Components: fs/s3
> Affects Versions: 2.8.0
> Environment: EC2 cluster
> Reporter: Rajesh Balamohan
> Assignee: Steve Loughran
> Fix For: 2.8.0
>
>
> S3 requests failing with an error coming from Http client,
> "java.lang.IllegalStateException: Connection is not open"
> Some online discussion implies that this is related to shared connection pool
> shutdown & fixed in http client 4.4+. Hadoop & AWS SDK use v 4.5.2 so the fix
> is in, we just need to make sure the pool is being set up right.
> There's a problem here of course: it may require moving to a later version of
> the AWS SDK, with the consequences on jackson &c, as seen in HADOOP-13050.
> And that's if there is a patched version out there
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