hadoop-hdfs-issues mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Andrew Wang (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HDFS-12232) ConfiguredFailoverProxyProvider caches DNS results indefinitely
Date Mon, 31 Jul 2017 21:51:00 GMT

     [ https://issues.apache.org/jira/browse/HDFS-12232?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Andrew Wang updated HDFS-12232:
-------------------------------
    Summary: ConfiguredFailoverProxyProvider caches DNS results indefinitely  (was: ConfiguredFailoverProxyProvider
caches DNS results infinitely)

> ConfiguredFailoverProxyProvider caches DNS results indefinitely
> ---------------------------------------------------------------
>
>                 Key: HDFS-12232
>                 URL: https://issues.apache.org/jira/browse/HDFS-12232
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: ha, hdfs
>            Reporter: Haohui Mai
>
> {{ConfiguredFailoverProxyProvider}} resolves the IP addresses and stores them in the
internal state. As a result when migrating the standby NN to a different machine, it requires
restarting all HDFS clients.
> A better approach is to follow Java's policy of caching DNS names: http://javaeesupportpatterns.blogspot.com/2011/03/java-dns-cache-reference-guide.html



--
This message was sent by Atlassian JIRA
(v6.4.14#64029)

---------------------------------------------------------------------
To unsubscribe, e-mail: hdfs-issues-unsubscribe@hadoop.apache.org
For additional commands, e-mail: hdfs-issues-help@hadoop.apache.org


Mime
View raw message