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Posted to common-issues@hadoop.apache.org by "Jelmer Kuperus (JIRA)" <ji...@apache.org> on 2018/05/04 07:34:00 UTC
[jira] [Updated] (HADOOP-15447) SwiftRestClient does not propertly
close connections
[ https://issues.apache.org/jira/browse/HADOOP-15447?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Jelmer Kuperus updated HADOOP-15447:
------------------------------------
Issue Type: Bug (was: Improvement)
> SwiftRestClient does not propertly close connections
> ----------------------------------------------------
>
> Key: HADOOP-15447
> URL: https://issues.apache.org/jira/browse/HADOOP-15447
> Project: Hadoop Common
> Issue Type: Bug
> Components: fs/swift
> Affects Versions: 2.9.0, 2.6.5, 2.7.4, 3.0.2
> Reporter: Jelmer Kuperus
> Priority: Major
>
> On production the output of netstat -a showed a large number of connections to swift hosts in the CLOSE_WAIT and ESTABLISHED state
> The reason is that while the SwiftRestClient calls releaseConnection, because HTTP 1.1 is used, the connection is not closed by the http client. Because it could pipeline further requests to the same host:port in the same connection.
> One way to remedy this is to add a "Connection: close" header
> This article further explains the issue : https://doc.nuxeo.com/blog/using-httpclient-properly-avoid-closewait-tcp-connections/
>
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