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From "Steve Loughran (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-13973) S3 requests failing: java.lang.IllegalStateException: Connection is not open
Date Wed, 11 Jan 2017 12:54:58 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-13973?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15818246#comment-15818246

Steve Loughran commented on HADOOP-13973:

The problem arises in S3A reopen(), which attempts to open/reopen HTTP connection. We currently
don't do any reties there.

Some hints
* http://stackoverflow.com/questions/29488106/java-lang-illegalstateexception-connection-pool-shut-down-while-using-spring-re
* http://stackoverflow.com/questions/25889925/apache-poolinghttpclientconnectionmanager-throwing-illegal-state-exception

the second hints that there's a fix in org.apache.httpcomponents:httpclient 4.4+; though you
need to make an extra method call in setup: I don't know if the AWS SDK does this

> S3 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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